Try fixing login/register

Signed-off-by: denis0001-dev <denis0001.dev@ya.ru>

.cursor/commands/clean-up.md

@@ -0,0 +1,40 @@
+# Code Cleanup Command
+
+## Overview
+Analyze git diff between the specified branch and HEAD (defaults to main if no branch specified) and clean up code quality issues without altering functionality.
+
+## Process
+1. **Get diff**: Run `git diff <branch>..HEAD` to see changes
+2. **Identify issues**: Look for code quality problems in the diff
+3. **Clean up**: Remove only the identified issues
+4. **Verify**: Ensure no behavioral changes
+
+## What to Clean Up
+- **Debug artifacts**: `console.log()`, `debugger`, `print()` statements
+- **Unused code**: Variables, imports, functions, parameters
+- **Commented code**: Dead code blocks, TODO comments (unless active)
+- **Formatting**: Inconsistent spacing, trailing whitespace
+- **Temporary code**: Test values, hardcoded strings meant to be dynamic
+- **Redundant code**: Duplicate logic, unnecessary intermediate variables
+
+## What NOT to Touch
+- **Functional logic**: Don't change how features work
+- **API interfaces**: Keep method signatures intact
+- **Configuration**: Don't modify settings or constants
+- **Comments**: Keep documentation and explanatory comments
+- **Error handling**: Don't remove try-catch blocks or validation
+
+## Safety Rules
+- ✅ Only modify code that appears in the git diff
+- ✅ Preserve all existing functionality
+- ✅ Maintain code readability and structure
+- ❌ Don't refactor or optimize beyond cleanup
+- ❌ Don't add new features or improvements
+- ❌ Don't change variable names or function signatures
+
+## Example
+```bash
+# If user specifies: "/clean-up main"
+git diff main
+# Clean only the issues found in this diff
+```

.cursor/commands/fix-typecheck-errors.md

@@ -0,0 +1 @@
+Run the command "npm run frontend:typecheck" and fix all errors listed in the command if there's any.

.cursor/commands/restructure.md

@@ -0,0 +1 @@
+Analyze my codebase and think how it could be better organized, like a better folder or code structure.

.cursor/commands/security-audit.md

@@ -0,0 +1,235 @@
+# Security Audit Command
+
+Perform a comprehensive security audit of the FromChat application codebase.
+
+## Project Context
+
+**FromChat** is a 100% open source secure messaging application with:
+- React/TypeScript frontend
+- Python FastAPI backend
+- End-to-end encryption for DMs and calls
+- Caddy reverse proxy with security headers
+- WebSocket support for real-time features
+- Electron support for desktop app
+
+## Important Design Decisions (NOT Vulnerabilities)
+
+When auditing, remember these are **intentional design choices**:
+
+1. **Public messages endpoint** - Open forum accessible without authentication (by design)
+   - The public chat is meant to be an open forum
+   - Private DMs are properly E2E encrypted and require authentication
+
+2. **Public user list** - All users visible in DMs tab (by design)
+   - Users can see all registered accounts
+   - This is intentional for a community-based chat app
+
+3. **XSS protection** - Multi-layer defense already implemented:
+   - React auto-escaping
+   - DOMPurify for sanitization
+   - Caddy CSP headers
+   - Do NOT flag localStorage key storage as critical (already well-protected)
+
+4. **File upload security** - Docker isolation in place:
+   - Server runs in Docker without executable flags
+   - Files cannot execute on server
+   - PIL re-encodes images
+   - Do NOT flag Content-Type validation as critical
+
+5. **CSRF protection** - Not needed:
+   - No cookies used
+   - JWT tokens in Authorization headers only
+   - CSRF attacks don't apply to this auth model
+
+6. **Beta domain CSP** - 'unsafe-inline' is required:
+   - Beta domain (beta.fromchat.ru) points to development machine
+   - Vite dev server requires 'unsafe-inline' to function
+   - Production domain has strict CSP
+
+7. **Security logging** - Already implemented:
+   - All events are logged including security-related activity
+   - Do NOT flag as missing
+
+8. **100% Open Source** - This is a security strength:
+   - Full transparency
+   - Community review capability
+   - No hidden backdoors
+
+## Android App
+
+**EXCLUDE from all audits** - Android app is not production-ready and out of scope.
+
+## Infrastructure (Caddy)
+
+The application runs behind Caddy reverse proxy with comprehensive security controls:
+
+### Caddyfile Configuration
+
+```caddyfile
+fromchat.ru {
+	reverse_proxy 172.18.0.1:8301 host.docker.internal:8301 172.17.0.1:8301 {
+		lb_policy first
+	}
+
+	# Security headers
+	header {
+		X-XSS-Protection "1; mode=block" # Prevent XSS attacks
+		X-Content-Type-Options "nosniff" # Prevent MIME type sniffing
+		X-Frame-Options "DENY" # Prevent clickjacking
+		Referrer-Policy "strict-origin-when-cross-origin"
+		Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';"
+		Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
+		Permissions-Policy "geolocation=(), microphone=(self), camera=(self)"
+	}
+
+	rate_limit {
+		zone global {
+			key {remote_ip}
+			window 1m
+			burst 20
+			events 500
+		}
+	}
+
+	handle_errors {
+		@errors {
+			expression {err.status_code} >= 400
+		}
+
+		handle @errors {
+			rewrite * /{err.status_code}
+			reverse_proxy https://http.cat {
+				header_up Host {upstream_hostport}
+				replace_status {err.status_code}
+			}
+		}
+	}
+}
+
+beta.fromchat.ru {
+    reverse_proxy 95.165.0.162:8301
+
+	# Security headers
+	header {
+		X-XSS-Protection "1; mode=block" # Prevent XSS attacks
+		X-Content-Type-Options "nosniff" # Prevent MIME type sniffing
+		X-Frame-Options "DENY" # Prevent clickjacking
+		Referrer-Policy "strict-origin-when-cross-origin"
+		Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';"
+		Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
+		Permissions-Policy "geolocation=(), microphone=(self), camera=(self)"
+	}
+
+	rate_limit {
+		zone global {
+			key {remote_ip}
+			window 1m
+			burst 20
+			events 1000
+		}
+	}
+
+	handle_errors {
+		@errors {
+			expression {err.status_code} >= 400
+		}
+
+		handle @errors {
+			rewrite * /{err.status_code}
+			reverse_proxy https://http.cat {
+				header_up Host {upstream_hostport}
+				replace_status {err.status_code}
+			}
+		}
+	}
+}
+```
+
+### Key Infrastructure Protections
+
+- ✅ **HTTPS enforcement** - Automatic SSL/TLS with Caddy
+- ✅ **HSTS** - Strict-Transport-Security with preload
+- ✅ **CSP** - Content Security Policy (strict on production, 'unsafe-inline' for scripts on beta for Vite)
+- ✅ **Rate limiting** - 500 events/min (production), 1000 events/min (beta)
+- ✅ **X-Frame-Options: DENY** - Prevents clickjacking
+- ✅ **X-Content-Type-Options: nosniff** - Prevents MIME sniffing
+- ✅ **X-XSS-Protection: 1; mode=block** - XSS protection
+- ✅ **Permissions-Policy** - Restricts geolocation, allows camera/mic for calls
+
+**Important:** These protections are already in place at the infrastructure level. Don't flag missing security headers or rate limiting in the application code.
+
+## Audit Process
+
+1. **Read the Caddyfile first** to understand infrastructure protections
+2. **Check backend code** for authentication, authorization, input validation
+3. **Review frontend code** for XSS protections, crypto implementation
+4. **Verify E2E encryption** implementation (NaCl for DMs, AES-GCM for calls)
+5. **Test CORS configuration** in backend/app.py
+6. **Review password policies** in backend/validation.py
+7. **Check file upload handling** in backend/routes/messaging.py and profile.py
+
+## Rating Guidelines
+
+- **Infrastructure (Caddy):** Should be 9/10 or higher (excellent security headers)
+- **Cryptography:** Should be 8-9/10 (uses industry-standard libraries)
+- **Frontend Security:** Should be 7-8/10 (multi-layer XSS protection)
+- **Backend API:** Focus on CORS, password policies, rate limiting
+
+## Output Format
+
+Provide a **clean, concise report** with:
+
+1. **Executive Summary** - Overall rating and production readiness
+2. **Security Status** - Critical issues (if any) and recommendations
+3. **Security Strengths** - What's done well
+4. **Component Ratings** - Table format for quick reference
+5. **Design Decisions** - Clarify what's intentional vs vulnerable
+6. **Threat Analysis** - Current realistic threats only
+7. **Recommendations** - Prioritized with time estimates
+8. **Conclusion** - Clear production readiness statement
+
+**Keep it under 500 lines** - focus on actionable findings, not verbose explanations.
+
+## Common False Positives to Avoid
+
+❌ **DO NOT FLAG THESE AS ISSUES:**
+- Public messages endpoint (intentional)
+- Username enumeration (users list is public by design)
+- Keys in localStorage (XSS is well-protected)
+- Content-Type validation (Docker isolation prevents execution)
+- CSRF protection (not applicable - no cookies)
+- Beta CSP 'unsafe-inline' (required for Vite)
+- Security logging (already implemented)
+- Android app security (out of scope)
+
+## Key Security Features to Verify
+
+✅ **MUST CHECK:**
+- CORS configuration in backend/app.py
+- Password validation in backend/validation.py
+- JWT token generation and validation
+- E2E encryption implementation (NaCl, AES-GCM)
+- File upload sanitization
+- Authorization checks on sensitive endpoints
+- Rate limiting configuration
+- Security headers in Caddyfile
+
+## Example Good Finding Format
+
+```markdown
+### Password Policy (HIGH PRIORITY - Non-blocking)
+**Current:** 5 character minimum
+**Recommended:** 12+ characters with complexity requirements
+**Risk:** Brute force attacks (mitigated by rate limiting)
+**Estimated Fix:** 4-6 hours
+**Code Location:** backend/validation.py:11-16
+```
+
+## Notes from Developer
+
+- Application is production-ready after CORS fix
+- Focus on practical, actionable improvements
+- Don't overthink things that are already well-protected
+- Open source is a feature, not a concern
+- Community can audit the code themselves
+

.cursor/commands/smart-rebase.md

@@ -0,0 +1,25 @@
+Please analyze the recent commits in this repository and help me clean up the commit history. I want you to:
+
+1. First, show me all commits between the target ref and HEAD using: `git log --oneline <base-branch>..HEAD`
+2. Identify which commits should be squashed together (like cleanup commits, small fixes, or related changes)
+3. For each group of commits you plan to squash, read their full details using: `git show <commit-hash>` to understand what changes they contain
+4. Create a git-rebase-todo.txt file with your recommended rebase plan
+5. Explain your reasoning for the squashing decisions, including what changes each squashed group contains. Be concise.
+6. Stop and ask me if i agree with your plan.
+7. Then execute the rebase using these exact commands (replace `<base-branch>` with the target branch/ref):
+   ```bash
+   export GIT_SEQUENCE_EDITOR="cp git-rebase-todo.txt"
+   git rebase -i <base-branch>
+   ```
+8. If there are conflicts, stop and ask me to fix them.
+9. Delete the `git-rebase-todo.txt` file you created.s
+
+**Usage:** You can specify a target branch/ref as an argument. If no argument is provided, stop and ask me for the branch or ref to rebase onto.
+
+Focus on:
+- Squashing small cleanup commits into their related feature commits
+- Combining related bug fixes
+- Keeping meaningful feature commits separate
+- Maintaining a clean, logical commit history
+
+Please be conservative - if you're unsure about squashing something, ask me for clarification.

.cursor/mcp.json

@@ -0,0 +1,8 @@
+{
+    "mcpServers": {
+        "mdui": {
+            "command": "npx",
+            "args": ["-y", "@mdui/mcp"]
+        }
+    }
+}

.cursor/rules/browser.mdc

@@ -0,0 +1,19 @@
+---
+alwaysApply: true
+---
+
+When using the browser, use this information to work better:
+
+## Login credentials
+
+Username: test
+Password: 11111
+
+## Server URL
+
+http://localhost:8301
+
+## Rules
+- Do NOT start the dev server yourself, it's started automatically. 
+  If the URL doesn't work, stop and ask me to turn on the dev server.
+- Don't wait, you are slow enough to keep up with the browser.

.cursor/rules/docs.mdc

@@ -1,6 +1,5 @@
 ---
-description: Documentation rules
-alwaysApply: false
+alwaysApply: true
 ---
 
 When documenting this project, follow these rules:

.cursor/rules/general.mdc

@@ -0,0 +1,61 @@
+---
+alwaysApply: true
+---
+
+When working with this project, follow these rules:
+
+## Core Behavior
+- NEVER do anything i didn't ask you for!
+- Don't talk like a robot. Behave more like a human.
+- Be concise and direct in responses.
+- If you're unsure about something, ask for clarification instead of guessing.
+
+## Code Quality & Principles
+- Follow DRY, SOLID, YAGNI and KISS principles.
+- Do NOT use old, outdated or deprecated APIs and functions.
+- Use double quotes ("") for strings consistently.
+- Prefer functional components over class components in React.
+- Use TypeScript strictly - avoid `any` types unless absolutely necessary.
+- DO NOT leave placeholders - ask me when it would be better or implement it fully.
+
+## File Operations
+- If possible, try to update files in a single edit when making multiple changes.
+- Do NOT "cd" to the project directory.
+
+## Testing & Validation
+- Do NOT "test the implementation" when you are done. The only exception is when you 
+  need to typecheck or build the app, in that case:
+  - To typecheck, run `npm run frontend:typecheck`.
+  - To build, run `npm run frontend:build`.
+- Do NOT execute other commands like "cd".
+- If the typecheck passed, there's no need for checking the linter errors.
+
+## Async Operations
+- When you need a delay, use `await delay(millis);` from `@/utils/utils` in an async function. If the current function is not async,
+  make it async.
+
+## Database
+- NEVER create database migrations, they are auto-generated.
+
+## Project Structure Awareness
+- This is a React/TypeScript frontend with Python FastAPI backend
+- Uses MDUI components for UI
+- Has Electron support for desktop app
+- Uses Zustand for state management
+- Uses use-immer for immutable state updates
+- Uses React Router for navigation
+- Has WebSocket support for real-time features
+- Uses encryption (tweetnacl) for security
+
+## Performance & Efficiency
+- Batch tool calls when possible to reduce latency
+- Use semantic search before grep when looking for concepts
+- Use TODOs for complex multi-step tasks to track progress
+
+## Styling
+- Use SCSS modules
+- Use nested styles
+- Put SCSS into one folder per page
+
+## Animations with Framer Motion
+- Don't use variants if they are used only once

.cursor/rules/ui.mdc

@@ -1,8 +1,13 @@
 ---
 alwaysApply: true
 ---
-
 When you work with UI:
 
-1. Use MDUI components as HTML elements
-2. Do NOT dynamically create HTML if it's going to be loaded when the page loads, instead put it statically in the HTML.
+1. Use MDUI components through the wrapper: `@/utils/material`. If the component you want to use is missing in that wrapper,
+   add it. Do NOT remove anything.
+3. The supporting text slot for MDUI lists is "description".
+4. When working with lists/sets in states, use the "useImmer" hook.
+5. Do NOT use inline styles in React components if they are static, instead write them in CSS.
+   Find the appropriate file to put the styles in, or create a new one.
+6. In SCSS, for Material Design colors use `$color-dark-<color-name>` variables. For all colors, refer 
+   to `frontend/src/css/_material.scss`.

.dockerignore

@@ -0,0 +1,12 @@
+# Exclude data directory to prevent local database from being copied into production images
+backend/data/
+
+# Exclude logs
+backend/logs/
+
+# Exclude development files
+node_modules/
+.git/
+.gitignore
+README.md
+*.log

.github/workflows/build.yml

@@ -1,35 +1,133 @@
-name: Build Electron Apps
+name: Build Electron app
 
 on:
   workflow_dispatch:
+    inputs:
+      apiBaseUrl:
+        description: "API base URL"
+        required: false
+        default: "fromchat.ru"
+        type: string
   push:
-    branches: ["main", "electron"]
+    tags: ["v**"]
     paths:
       - 'frontend/**'
       - 'package.json'
-      - 'package-lock.json'
-      - 'frontend/electron/**'
       - '.github/workflows/build.yml'
 
 concurrency:
   group: build-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
-  build:
-    name: Build (${{ matrix.os }})
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+  build-linux:
+    name: Build Linux
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+
+      - name: Cache dependencies
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: npm-ubuntu-latest-node-24-${{ hashFiles('package.json') }}
+          restore-keys: |
+            npm-ubuntu-latest-node-24-
+
+      - name: Install dependencies
+        run: npm install --ignore-scripts --no-audit --no-fund
+
+      - name: Cache Electron downloads
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cache/electron
+            ~/.cache/electron-builder
+          key: electron-ubuntu-latest-${{ hashFiles('package.json', 'package.json') }}
+          restore-keys: |
+            electron-ubuntu-latest-
+
+      - name: Build Electron app
+        shell: bash
+        env:
+          VITE_API_BASE_URL: ${{ inputs.apiBaseUrl }}
+        run: npm run build:electron
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: FromChat-linux
+          path: |
+            frontend/build/electron/forge/make/*/**
+          if-no-files-found: error
+
+  build-macos:
+    name: Build macOS
+    runs-on: macos-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+
+      - name: Cache dependencies
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: npm-macos-latest-node-24-${{ hashFiles('package.json') }}
+          restore-keys: |
+            npm-macos-latest-node-24-
+
+      - name: Install dependencies
+        run: npm install --ignore-scripts --no-audit --no-fund
+
+      # - name: Cache Electron downloads
+      #   uses: actions/cache@v4
+      #   with:
+      #     path: |
+      #       ~/.cache/electron
+      #       ~/.cache/electron-builder
+      #     key: electron-macos-latest-${{ hashFiles('package.json') }}
+      #     restore-keys: |
+      #       electron-macos-latest-
+
+      - name: Build Electron app
+        shell: bash
+        env:
+          VITE_API_BASE_URL: ${{ inputs.apiBaseUrl }}
+        run: npm run build:electron
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: FromChat-macOS
+          path: |
+            frontend/build/electron/forge/make/zip/darwin/*/**.zip
+          if-no-files-found: error
+
+  build-windows:
+    name: Build Windows
+    runs-on: windows-latest
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
       - name: Force npm to use Bash
-        if: runner.os == 'Windows'
         run: npm config set script-shell "C:\Program Files\Git\bin\bash.exe"
 
       - name: Setup Node.js
@@ -37,61 +135,37 @@ jobs:
         with:
           node-version: '24'
 
-      - name: Cache npm (Linux/macOS)
-        if: runner.os != 'Windows'
+      - name: Cache dependencies
         uses: actions/cache@v4
         with:
-          path: ~/.npm
-          key: npm-${{ runner.os }}-node-24-${{ hashFiles('package.json') }}
+          path: node_modules
+          key: npm-windows-latest-node-24-${{ hashFiles('package.json') }}
           restore-keys: |
-            npm-${{ runner.os }}-node-24-
+            npm-windows-latest-node-24-
 
-      - name: Cache npm (Windows)
-        if: runner.os == 'Windows'
-        uses: actions/cache@v4
-        with:
-          path: ~\AppData\Local\npm-cache
-          key: npm-${{ runner.os }}-node-24-${{ hashFiles('package.json') }}
-          restore-keys: |
-            npm-${{ runner.os }}-node-24-
-
-      - name: Install root deps (no scripts)
+      - name: Install dependencies
         run: npm install --ignore-scripts --no-audit --no-fund
 
-      - name: Install Electron Forge deps
-        run: npm run frontend:electron:dependencies
-
-      - name: Cache Electron downloads (Linux/macOS)
-        if: runner.os != 'Windows'
-        uses: actions/cache@v4
-        with:
-          path: |
-            ~/.cache/electron
-            ~/.cache/electron-builder
-          key: electron-${{ runner.os }}-${{ hashFiles('package.json', 'frontend/electron/forge/package.json') }}
-          restore-keys: |
-            electron-${{ runner.os }}-
-
-      - name: Cache Electron downloads (Windows)
-        if: runner.os == 'Windows'
+      - name: Cache Electron downloads
         uses: actions/cache@v4
         with:
           path: |
             ~\AppData\Local\electron\Cache
             ~\AppData\Local\electron-builder\Cache
-          key: electron-${{ runner.os }}-${{ hashFiles('package.json', 'frontend/electron/forge/package.json') }}
+          key: electron-windows-latest-${{ hashFiles('package.json') }}
           restore-keys: |
-            electron-${{ runner.os }}-
+            electron-windows-latest-
 
       - name: Build Electron app
         shell: bash
+        env:
+          VITE_API_BASE_URL: ${{ inputs.apiBaseUrl }}
         run: npm run build:electron
 
       - name: Upload artifact
         uses: actions/upload-artifact@v4
         with:
-          name: fromchat-${{ runner.os }}
+          name: FromChat-windows
           path: |
-            frontend/electron/forge/out/**
+            frontend/build/electron/forge/make/zip/win32/x64
           if-no-files-found: error
-

.github/workflows/deploy.yml

@@ -3,8 +3,17 @@ name: Deploy to server
 
 on:
   # Runs on pushes targeting the default branch
-  push:
-    branches: ["main"]
+  # push:
+  #   branches: ["main"]
+  #   paths:
+  #     - "backend/**"
+  #     - "frontend/**"
+  #     - "deployment/**"
+  #     - "**/package.json"
+  #     - ".nvmrc"
+  #     - ".github/workflows/deploy.yml"
+  #     - "!frontend/electron/**"
+  #     - "!**.d.ts"
   workflow_dispatch:
 
 # Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
@@ -13,14 +22,17 @@ concurrency:
   group: "pages"
   cancel-in-progress: false
 
+permissions:
+  contents: read
+
 jobs:
   deploy:
-    runs-on: self-hosted
+    runs-on: raspberry-pi
     env:
       HOME: "/root"
     environment:
       name: production
-      url: https://fromchat.toolbox-io.ru
+      url: https://fromchat.ru
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -30,6 +42,10 @@ jobs:
           touch deployment/.env
           cat > deployment/.env << EOF
           JWT_SECRET=${{ secrets.JWT_SECRET }}
+          VAPID_PUBLIC_KEY=${{ secrets.VAPID_PUBLIC_KEY }}
+          VAPID_PRIVATE_KEY=${{ secrets.VAPID_PRIVATE_KEY }}
+          TURN_USERNAME=${{ vars.TURN_USERNAME }}
+          TURN_PASSWORD=${{ secrets.TURN_PASSWORD }}
           EOF
       - name: Build container
         run: |

.gitignore

@@ -1,6 +1,6 @@
 # File created using '.gitignore Generator' for Visual Studio Code: https://bit.ly/vscode-gig
-# Created by https://www.toptal.com/developers/gitignore/api/visualstudiocode,python,macos,node,osx
-# Edit at https://www.toptal.com/developers/gitignore?templates=visualstudiocode,python,macos,node,osx
+# Created by https://www.toptal.com/developers/gitignore/api/visualstudiocode,python,osx,node,macos,react,reactnative
+# Edit at https://www.toptal.com/developers/gitignore?templates=visualstudiocode,python,osx,node,macos,react,reactnative
 
 ### macOS ###
 # General
@@ -112,6 +112,7 @@ web_modules/
 
 # dotenv environment variable files
 .env
+.env.prod
 .env.development.local
 .env.test.local
 .env.production.local
@@ -203,6 +204,8 @@ dist/
 downloads/
 eggs/
 .eggs/
+lib/
+lib64/
 parts/
 sdist/
 var/
@@ -353,6 +356,194 @@ poetry.toml
 # LSP config files
 pyrightconfig.json
 
+### react ###
+.DS_*
+**/*.backup.*
+**/*.back.*
+
+node_modules
+
+*.sublime*
+
+psd
+thumb
+sketch
+
+### ReactNative ###
+# React Native Stack Base
+
+.expo
+__generated__
+
+### ReactNative.macOS Stack ###
+# General
+
+# Icon must end with two \r
+
+# Thumbnails
+
+# Files that might appear in the root of a volume
+
+# Directories potentially created on remote AFP share
+
+### ReactNative.Android Stack ###
+# Gradle files
+.gradle/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Log/OS Files
+
+# Android Studio generated files and folders
+captures/
+.externalNativeBuild/
+.cxx/
+*.apk
+output.json
+
+# IntelliJ
+*.iml
+.idea/
+misc.xml
+deploymentTargetDropDown.xml
+render.experimental.xml
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof
+
+### ReactNative.Gradle Stack ###
+.gradle
+**/build/
+!src/**/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Avoid ignore Gradle wrappper properties
+!gradle-wrapper.properties
+
+# Cache of project
+.gradletasknamecache
+
+# Eclipse Gradle plugin generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+### ReactNative.Xcode Stack ###
+## User settings
+xcuserdata/
+
+## Xcode 8 and earlier
+*.xcscmblueprint
+*.xccheckout
+
+### ReactNative.Linux Stack ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### ReactNative.Node Stack ###
+# Logs
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+# Runtime data
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+# Coverage directory used by tools like istanbul
+
+# nyc test coverage
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+# Bower dependency directory (https://bower.io/)
+
+# node-waf configuration
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+# Dependency directories
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+# TypeScript cache
+
+# Optional npm cache directory
+
+# Optional eslint cache
+
+# Optional stylelint cache
+
+# Microbundle cache
+
+# Optional REPL history
+
+# Output of 'npm pack'
+
+# Yarn Integrity file
+
+# dotenv environment variable files
+
+# parcel-bundler cache (https://parceljs.org/)
+
+# Next.js build output
+
+# Nuxt.js build / generate output
+
+# Gatsby files
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+
+# vuepress v2.x temp and cache directory
+
+# Docusaurus cache and generated files
+
+# Serverless directories
+
+# FuseBox cache
+
+# DynamoDB Local files
+
+# TernJS port file
+
+# Stores VSCode versions used for testing VSCode extensions
+
+# yarn v2
+
+### ReactNative.Buck Stack ###
+buck-out/
+.buckconfig.local
+.buckd/
+.buckversion
+.fakebuckversion
+
 ### VisualStudioCode ###
 .vscode/*
 !.vscode/settings.json
@@ -372,12 +563,17 @@ pyrightconfig.json
 .history
 .ionide
 
-# End of https://www.toptal.com/developers/gitignore/api/visualstudiocode,python,macos,node,osx
+# End of https://www.toptal.com/developers/gitignore/api/visualstudiocode,python,osx,node,macos,react,reactnative
 
 # Custom rules (everything added below won't be overriden by 'Generate .gitignore File' if you use 'Update' option)
 
-data
+backend/data
 .vite
 *.db
 package-lock.json
-dist-electron
+backend/alembic/**
+!backend/alembic/env.py
+!backend/alembic/script.py.mako
+!frontend/src/css/lib
+**/*.module.scss.d.ts
+.cursor/plans

.husky/post-push

@@ -0,0 +1,116 @@
+#!/bin/sh
+# Post-push hook: opens deploy command in system's native terminal
+# Cross-platform support: macOS, Linux, Windows, WSL
+
+# Get the project root directory
+PROJECT_ROOT="$(git rev-parse --show-toplevel)"
+cd "$PROJECT_ROOT" || exit 1
+
+# Command to run in terminal (deploy.sh will load .env from project root)
+COMMAND="npm run -s deploy"
+
+# Detect OS and open appropriate terminal
+detect_and_open_terminal() {
+    # Detect WSL
+    if [ -n "${WSL_DISTRO_NAME:-}" ] || [ -f /proc/version ] && grep -qi microsoft /proc/version 2>/dev/null; then
+        # WSL detected - try to open Windows Terminal, fallback to Linux terminals
+        if command -v wt.exe >/dev/null 2>&1; then
+            # Windows Terminal (preferred for WSL)
+            ESCAPED_PATH=$(echo "$PROJECT_ROOT" | sed "s/'/'\"'\"'/g")
+            ESCAPED_CMD=$(echo "$COMMAND" | sed "s/'/'\"'\"'/g")
+            wt.exe bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+        elif command -v wsl.exe >/dev/null 2>&1; then
+            # Fallback: use wsl.exe to open cmd
+            WINDOWS_PATH=$(wslpath -w "$PROJECT_ROOT" 2>/dev/null || echo "$PROJECT_ROOT")
+            cmd.exe /c "start cmd /k \"cd /d $WINDOWS_PATH && $COMMAND\""
+        else
+            # Fallback to Linux terminal
+            open_linux_terminal
+        fi
+    # macOS
+    elif [ "$(uname)" = "Darwin" ]; then
+        # macOS - use .command file with open command
+        # Clean up old script files and create a new one
+        rm -f /tmp/post-push-deploy-*.command 2>/dev/null
+        SCRIPT_FILE=$(mktemp /tmp/post-push-deploy-XXXXXX.command 2>/dev/null)
+        if [ -z "$SCRIPT_FILE" ] || [ ! -f "$SCRIPT_FILE" ]; then
+            # Fallback if mktemp fails
+            SCRIPT_FILE="/tmp/post-push-deploy-$$.command"
+        fi
+        {
+            echo "#!/bin/bash"
+            echo "clear"
+            echo "cd '$PROJECT_ROOT'"
+            echo "export PS1=''"
+            echo "set +x"
+            # Export DEPLOYMENT_SERVER if it was set in the hook environment
+            if [ -n "$DEPLOYMENT_SERVER_VALUE" ]; then
+                echo "export DEPLOYMENT_SERVER='$DEPLOYMENT_SERVER_VALUE'"
+            fi
+            echo "$COMMAND"
+            echo "echo ''"
+            echo "echo 'Press Enter to close...'"
+            echo "read -r"
+            echo "osascript -e 'tell application \"Terminal\" to close front window' &"
+        } > "$SCRIPT_FILE"
+        chmod +x "$SCRIPT_FILE"
+        # Use open command to launch .command file - opens only one Terminal window
+        open "$SCRIPT_FILE"
+    # Windows (Git Bash or similar)
+    elif [ -n "${MSYSTEM:-}" ] || [ -n "${MINGW64:-}" ] || [ -n "${MINGW32:-}" ]; then
+        # Git Bash on Windows
+        if command -v wt.exe >/dev/null 2>&1; then
+            # Windows Terminal
+            ESCAPED_PATH=$(echo "$PROJECT_ROOT" | sed "s/'/'\"'\"'/g")
+            ESCAPED_CMD=$(echo "$COMMAND" | sed "s/'/'\"'\"'/g")
+            wt.exe bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+        elif command -v cmd.exe >/dev/null 2>&1; then
+            # Command Prompt - convert path to Windows format
+            WINDOWS_PATH=$(echo "$PROJECT_ROOT" | sed 's|^/\([a-z]\)|\1:|' | sed 's|/|\\|g' | sed 's|\\|\\\\|g')
+            cmd.exe /c "start cmd /k \"cd /d $WINDOWS_PATH && $COMMAND\""
+        else
+            # Fallback
+            ESCAPED_PATH=$(echo "$PROJECT_ROOT" | sed "s/'/'\"'\"'/g")
+            start "Deploy" bash -c "cd '$ESCAPED_PATH' && $COMMAND; exec bash"
+        fi
+    # Linux
+    else
+        open_linux_terminal
+    fi
+}
+
+open_linux_terminal() {
+    # Escape path for use in shell commands
+    ESCAPED_PATH=$(echo "$PROJECT_ROOT" | sed "s/'/'\"'\"'/g")
+    
+    ESCAPED_CMD=$(echo "$COMMAND" | sed "s/'/'\"'\"'/g")
+    # Try different Linux terminal emulators
+    if command -v gnome-terminal >/dev/null 2>&1; then
+        gnome-terminal -- bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+    elif command -v x-terminal-emulator >/dev/null 2>&1; then
+        x-terminal-emulator -e bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+    elif command -v konsole >/dev/null 2>&1; then
+        konsole -e bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+    elif command -v xterm >/dev/null 2>&1; then
+        xterm -e bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+    elif command -v alacritty >/dev/null 2>&1; then
+        alacritty -e bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+    elif command -v kitty >/dev/null 2>&1; then
+        kitty bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+    elif command -v tilix >/dev/null 2>&1; then
+        tilix -e bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+    else
+        # Last resort: try to find any terminal
+        TERMINAL=$(command -v x-terminal-emulator gnome-terminal konsole xterm alacritty kitty tilix 2>/dev/null | head -1)
+        if [ -n "$TERMINAL" ]; then
+            "$TERMINAL" -e bash -c "cd '$ESCAPED_PATH' && set +x && echo 'Post-push: Running deploy...' && $ESCAPED_CMD && echo '' && echo 'Deploy completed. Press Enter to close...' && read -r && exit"
+        else
+            echo "Could not find a terminal emulator. Please run manually: cd '$PROJECT_ROOT' && $COMMAND"
+        fi
+    fi
+}
+
+# Run in background so git push doesn't wait
+# Add a small delay to ensure git push completes first
+(sleep 0.5 && detect_and_open_terminal) &
+

.husky/pre-commit

@@ -0,0 +1,2 @@
+#!/bin/sh
+npm run frontend:typecheck

.vscode/settings.json

@@ -1,6 +1,11 @@
 {
     "files.exclude": {
         "**/__pycache__": true,
-        "**/package-lock.json": true
-    }
+        "**/package-lock.json": true,
+        "**/*.module.scss.d.ts": true,
+        "**/.husky/_": true,
+        "**/.venv": true,
+        "**/node_modules": true
+    },
+    "python.terminal.activateEnvironment": false
 }

.vscode/tasks.json

@@ -2,9 +2,9 @@
     "version": "2.0.0",
     "tasks": [
         {
-            "label": "Run",
-            "type": "shell",
-            "command": "npm run dev",
+            "label": "Backend",
+            "type": "npm",
+            "script": "backend:run",
             "options": {
                 "cwd": "${workspaceFolder}"
             },
@@ -16,23 +16,88 @@
             },
             "group": {
                 "kind": "build"
+            },
+            "isBackground": true
+        },
+        {
+            "label": "Frontend (Web)",
+            "type": "npm",
+            "script": "frontend:dev",
+            "options": {
+                "cwd": "${workspaceFolder}"
+            },
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": false,
+                "panel": "shared"
+            },
+            "group": {
+                "kind": "build"
+            },
+            "isBackground": true
+        },
+        {
+            "label": "Frontend (Electron)",
+            "type": "npm",
+            "script": "frontend:electron:dev",
+            "options": {
+                "cwd": "${workspaceFolder}"
+            },
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": false,
+                "panel": "shared"
+            },
+            "group": {
+                "kind": "build"
+            },
+            "isBackground": true
+        },
+
+        {
+            "label": "Web",
+            "dependsOn": ["Backend", "Frontend (Web)"],
+            "dependsOrder": "parallel",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": false,
+                "panel": "shared"
+            },
+            "runOptions": {
+                "runOn": "folderOpen"
             }
         },
         {
-            "label": "Run (Electron)",
-            "type": "shell",
-            "command": "npm run dev:electron",
-            "options": {
-                "cwd": "${workspaceFolder}"
+            "label": "Electron",
+            "dependsOn": ["Backend", "Frontend (Electron)"],
+            "dependsOrder": "parallel",
+            "group": {
+                "kind": "build"
             },
             "presentation": {
                 "echo": true,
                 "reveal": "always",
                 "focus": false,
                 "panel": "shared"
+            }
         },
-            "group": {
-                "kind": "build"
+        {
+            "label": "Deploy",
+            "type": "shell",
+            "command": "npm run deploy",
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": true,
+                "panel": "dedicated",
+                "clear": true
             }
         }
     ]

README.md

@@ -2,7 +2,7 @@
 
 FromChat - полностью открытый мессенджер. 
 
-Демо версию можно попробовать на [сайте](http://95.165.0.162:8301).
+Его можно попробовать на [сайте](http://fromchat.ru).
 
 ## Содержание:
 - [Основные моменты](#highlights)

backend/admin_cli.py

@@ -0,0 +1,417 @@
+from __future__ import annotations
+
+import argparse
+import base64
+import hashlib
+import hmac
+import os
+import shlex
+import sys
+from getpass import getpass
+from typing import Iterable, List, Optional, Tuple
+import readline
+import httpx
+from rich.console import Console
+from rich.panel import Panel
+from rich.table import Table
+
+
+class CLIError(Exception):
+    """Generic CLI error with a human-readable message."""
+
+
+def _hkdf_extract(salt: bytes, ikm: bytes) -> bytes:
+    return hmac.new(salt, ikm, hashlib.sha256).digest()
+
+
+def _hkdf_expand(prk: bytes, info: bytes, length: int) -> bytes:
+    blocks: list[bytes] = []
+    previous = b""
+    counter = 1
+    while len(b"".join(blocks)) < length:
+        previous = hmac.new(prk, previous + info + bytes([counter]), hashlib.sha256).digest()
+        blocks.append(previous)
+        counter += 1
+    return b"".join(blocks)[:length]
+
+
+def derive_auth_secret(username: str, password: str) -> str:
+    salt = f"fromchat.user:{username}".encode("utf-8")
+    prk = _hkdf_extract(salt, password.encode("utf-8"))
+    okm = _hkdf_expand(prk, b"auth-secret", 32)
+    return base64.b64encode(okm).decode("utf-8")
+
+
+def _read_single_key() -> str:
+    try:  # Windows
+        import msvcrt  # type: ignore
+
+        ch = msvcrt.getch()
+        return ch.decode("utf-8", errors="ignore").lower()
+    except ImportError:
+        import termios
+        import tty
+
+        fd = sys.stdin.fileno()
+        old_settings = termios.tcgetattr(fd)
+        try:
+            tty.setraw(fd)
+            ch = sys.stdin.read(1)
+        finally:
+            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+        return ch.lower()
+
+
+class AdminCLI:
+    def __init__(self, api_url: str) -> None:
+        self.console = Console()
+        self.api_url = api_url.rstrip("/")
+        self.client = httpx.Client(base_url=self.api_url, timeout=30.0)
+        self.username: Optional[str] = None
+        self.token: Optional[str] = None
+
+    # --------------------------- HTTP helpers --------------------------- #
+    def _auth_headers(self) -> dict:
+        headers: dict = {}
+        if self.token:
+            headers["Authorization"] = f"Bearer {self.token}"
+        return headers
+
+    def _request(self, method: str, path: str, *, auth: bool = True, **kwargs) -> httpx.Response:
+        rel_path = path.lstrip("/")
+        headers = kwargs.pop("headers", {})
+        if auth:
+            headers.update(self._auth_headers())
+        response = self.client.request(method, rel_path, headers=headers, **kwargs)
+        if response.status_code >= 400:
+            detail = ""
+            try:
+                payload = response.json()
+                if isinstance(payload, dict):
+                    detail = payload.get("detail") or payload.get("message") or ""
+            except Exception:
+                detail = response.text
+            message = f"{response.status_code} {response.reason_phrase}"
+            if detail:
+                message = f"{message}: {detail}"
+            raise CLIError(message.strip())
+        return response
+
+    # --------------------------- CLI primitives ------------------------- #
+    def _require_auth(self) -> None:
+        if not self.token:
+            raise CLIError("You must login before running this command.")
+
+    def _resolve_user(self, identifier: str) -> dict:
+        self._require_auth()
+        if identifier.isdigit():
+            response = self._request("GET", f"user/id/{identifier}")
+        else:
+            response = self._request("GET", f"user/{identifier.replace('@', '')}")
+        return response.json()
+
+    def _confirm(self, prompt: str) -> bool:
+        self.console.print(f"[bold yellow]{prompt}[/] [green](y)[/] / [red](n)[/]: ", end="")
+        choice = _read_single_key()
+        self.console.print("")  # move to next line
+        return choice == "y"
+
+    def _render_user(self, user: dict) -> None:
+        table = Table(show_header=False)
+        table.add_row("ID", str(user.get("id")))
+        table.add_row("Username", user.get("username", ""))
+        table.add_row("Display name", user.get("display_name", ""))
+        table.add_row("Verified", "✅" if user.get("verified") else "❌")
+        if user.get("suspended"):
+            table.add_row("Suspended", f"🚫 ({user.get('suspension_reason') or 'no reason'})")
+        else:
+            table.add_row("Suspended", "✅ Active")
+        self.console.print(table)
+
+    # --------------------------- Commands ------------------------------- #
+    def cmd_login(self, args: List[str]) -> None:
+        if args:
+            username = args[0]
+        else:
+            username = self.console.input("[bold cyan]Username[/]: ").strip()
+        if not username:
+            raise CLIError("Username is required.")
+
+        password = getpass("Password: ")
+        derived_password = derive_auth_secret(username, password)
+        payload = {"username": username, "password": derived_password}
+        response = self._request("POST", "login", json=payload, auth=False)
+        body = response.json()
+        token = body.get("token")
+        if not token:
+            raise CLIError("Authentication succeeded but token was not returned.")
+        self.token = token
+        self.username = username
+        self.console.print("[bold green]Login successful.[/]")
+
+    def cmd_suspend(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: suspend <user_id|username>")
+        identifier = args[0]
+        user = self._resolve_user(identifier)
+        self.console.print(Panel.fit("[bold red]Suspend user[/]", style="red"))
+        self._render_user(user)
+        reason = self.console.input("[bold yellow]Reason (press Enter to leave empty)[/]: ").strip()
+        if not self._confirm(f"Confirm suspension of {user.get('username')}?"):
+            self.console.print("[yellow]Suspension cancelled.[/]")
+            return
+        payload = {"reason": reason}
+        self._request("POST", f"user/{user['id']}/suspend", json=payload)
+        log_reason = reason or "no reason provided"
+        self.console.print(f"[bold red]User {user['username']} suspended ({log_reason}).[/]")
+
+    def cmd_unsuspend(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: unsuspend <user_id|username>")
+        identifier = args[0]
+        user = self._resolve_user(identifier)
+        self.console.print(Panel.fit("[bold green]Unsuspend user[/]", style="green"))
+        self._render_user(user)
+        if not self._confirm(f"Unsuspend {user.get('username')}?"):
+            self.console.print("[yellow]Unsuspension cancelled.[/]")
+            return
+        self._request("POST", f"user/{user['id']}/unsuspend")
+        self.console.print(f"[bold green]User {user['username']} unsuspended.[/]")
+
+    def cmd_block_word(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: block-word <word or phrase> [additional words...]")
+        self._require_auth()
+        words = args
+        response = self._request("POST", "moderation/blocklist", json={"words": words})
+        data = response.json()
+        added = data.get("added", [])
+        current = data.get("words", [])
+        if added:
+            self.console.print(f"[bold green]Added {len(added)} entr{'y' if len(added)==1 else 'ies'} to blocklist.[/]")
+        else:
+            self.console.print("[yellow]No new words added.[/]")
+        self.console.print(f"Blocklist size: {len(current)}")
+
+    def cmd_list_users(self) -> None:
+        self._require_auth()
+        payload = self._request("GET", "user/list").json()
+        users = payload.get("users", [])
+        table = Table(title="Users", show_lines=False)
+        table.add_column("ID")
+        table.add_column("Username")
+        table.add_column("Display name")
+        table.add_column("Suspended")
+        for user in users:
+            table.add_row(
+                str(user.get("id")),
+                user.get("username", ""),
+                user.get("display_name", ""),
+                "🚫" if user.get("suspended") else "✅",
+            )
+        self.console.print(table)
+
+    def cmd_user(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: user <user_id|username>")
+        user = self._resolve_user(args[0])
+        self._render_user(user)
+
+    def cmd_delete(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: delete <user_id|username>")
+        user = self._resolve_user(args[0])
+        self.console.print(Panel.fit("[bold red]Delete user[/]", style="red"))
+        self._render_user(user)
+        if not self._confirm(f"Permanently delete {user.get('username')}?"):
+            self.console.print("[yellow]Deletion cancelled.[/]")
+            return
+        self._request("POST", f"user/{user['id']}/delete")
+        self.console.print(f"[bold red]User {user['username']} deleted.[/]")
+
+    def cmd_unblock_word(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: unblock-word <word or phrase> [additional words...]")
+        self._require_auth()
+        response = self._request("DELETE", "moderation/blocklist", json={"words": args})
+        data = response.json()
+        removed = data.get("removed", [])
+        current = data.get("words", [])
+        if removed:
+            self.console.print(f"[bold green]Removed {len(removed)} entr{'y' if len(removed)==1 else 'ies'} from blocklist.[/]")
+        else:
+            self.console.print("[yellow]No matching words removed.[/]")
+        self.console.print(f"Blocklist size: {len(current)}")
+
+    def cmd_verify(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: verify <user_id|username>")
+        user = self._resolve_user(args[0])
+        if user.get("verified"):
+            self.console.print(f"[yellow]{user['username']} is already verified.[/]")
+            return
+        self._request("POST", f"user/{user['id']}/verify")
+        self.console.print(f"[bold green]{user['username']} marked as verified.[/]")
+
+    def cmd_unverify(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: unverify <user_id|username>")
+        user = self._resolve_user(args[0])
+        if not user.get("verified"):
+            self.console.print(f"[yellow]{user['username']} is already unverified.[/]")
+            return
+        self._request("POST", f"user/{user['id']}/verify")
+        self.console.print(f"[bold green]{user['username']} is now unverified.[/]")
+
+    def cmd_list_blocklist(self) -> None:
+        self._require_auth()
+        response = self._request("GET", "moderation/blocklist")
+        words = response.json().get("words", [])
+        if not words:
+            self.console.print("[cyan]Blocklist is empty.[/]")
+            return
+        table = Table(title="Blocked Words", show_lines=True)
+        table.add_column("Word / Phrase")
+        for entry in words:
+            table.add_row(entry)
+        self.console.print(table)
+
+    def cmd_unblock_ip(self, args: List[str]) -> None:
+        if not args:
+            raise CLIError("Usage: unblock-ip <ip_address>")
+        self._require_auth()
+        ip = args[0].strip()
+        if not ip:
+            raise CLIError("IP address cannot be empty")
+        response = self._request("POST", "moderation/unblock-ip", json={"ip": ip})
+        data = response.json()
+        message = data.get("message", "IP unblocked")
+        self.console.print(f"[bold green]{message}[/]")
+
+    def cmd_clear_all_rate_limits(self) -> None:
+        """Clear all rate limit entries. Use with caution."""
+        self._require_auth()
+        if not self._confirm("Clear ALL rate limit entries? This affects all IPs."):
+            self.console.print("[yellow]Operation cancelled.[/]")
+            return
+        response = self._request("POST", "moderation/clear-all-rate-limits")
+        data = response.json()
+        message = data.get("message", "Rate limits cleared")
+        self.console.print(f"[bold green]{message}[/]")
+
+    def cmd_help(self) -> None:
+        cmds = {
+            "login [username]": "Authenticate as owner/admin.",
+            "suspend <user>": "Suspend account (alias: ban).",
+            "unsuspend <user>": "Unsuspend account (alias: unban).",
+            "delete <user>": "Permanently delete the user account.",
+            "verify <user>": "Mark user as verified.",
+            "unverify <user>": "Remove verification flag.",
+            "block-word <words>": "Add words/phrases to chat filter.",
+            "unblock-word <words>": "Remove words/phrases from filter.",
+            "blocklist": "Show current blocklist.",
+            "unblock-ip <ip>": "Unblock an IP address from rate limiting.",
+            "clear-all-rate-limits": "Clear all rate limit entries (use with caution).",
+            "list": "List all users.",
+            "user <user>": "Show detailed user information.",
+            "whoami": "Display current session context.",
+            "help": "Show this help panel.",
+            "exit": "Quit the CLI.",
+        }
+        table = Table(title="Available Commands")
+        table.add_column("Command", style="cyan")
+        table.add_column("Description", style="white")
+        for cmd, desc in cmds.items():
+            table.add_row(cmd, desc)
+        self.console.print(table)
+
+    def cmd_whoami(self) -> None:
+        if not self.token:
+            self.console.print("[yellow]Not authenticated.[/]")
+            return
+        self.console.print(f"[green]Logged in as[/] [bold]{self.username}[/] ({self.api_url})")
+
+    # --------------------------- Main loop ------------------------------ #
+    def run(self) -> None:
+        self.console.print(Panel.fit("[bold magenta]FromChat Admin CLI[/]", style="magenta"))
+        while True:
+            prompt_identity = self.username or "guest"
+            try:
+                prompt_str = f"\033[36m{prompt_identity}\033[0m \033[1m>\033[0m "
+                raw = input(prompt_str).strip()
+            except (KeyboardInterrupt, EOFError):
+                self.console.print("\n[red]Exiting...[/]")
+                break
+
+            if not raw:
+                continue
+
+            try:
+                parts = shlex.split(raw)
+            except ValueError as exc:
+                self.console.print(f"[red]Parse error:[/] {exc}")
+                continue
+
+            command = parts[0].lstrip("/").lower()
+            args = parts[1:]
+
+            if command in {"exit", "quit"}:
+                self.console.print("[red]Goodbye.[/]")
+                break
+
+            try:
+                if command == "login":
+                    self.cmd_login(args)
+                elif command in {"suspend", "ban"}:
+                    self.cmd_suspend(args)
+                elif command in {"unsuspend", "unban"}:
+                    self.cmd_unsuspend(args)
+                elif command == "block-word":
+                    self.cmd_block_word(args)
+                elif command == "unblock-word":
+                    self.cmd_unblock_word(args)
+                elif command == "blocklist":
+                    self.cmd_list_blocklist()
+                elif command == "unblock-ip":
+                    self.cmd_unblock_ip(args)
+                elif command == "clear-all-rate-limits":
+                    self.cmd_clear_all_rate_limits()
+                elif command == "verify":
+                    self.cmd_verify(args)
+                elif command == "unverify":
+                    self.cmd_unverify(args)
+                elif command in {"delete", "remove"}:
+                    self.cmd_delete(args)
+                elif command == "list":
+                    self.cmd_list_users()
+                elif command == "user":
+                    self.cmd_user(args)
+                elif command == "help":
+                    self.cmd_help()
+                elif command == "whoami":
+                    self.cmd_whoami()
+                else:
+                    self.console.print("[yellow]Unknown command. Type /help for a list of commands.[/]")
+            except CLIError as err:
+                self.console.print(f"[red]Error:[/] {err}")
+            except httpx.RequestError as err:
+                self.console.print(f"[red]Network error:[/] {err}")
+
+        self.client.close()
+
+
+def main(argv: Optional[Iterable[str]] = None) -> None:
+    parser = argparse.ArgumentParser(description="FromChat Emergency Admin CLI")
+    parser.add_argument(
+        "--api-url",
+        default=os.getenv("FC_ADMIN_API_URL", "http://127.0.0.1:8300"),
+        help="Base API URL for the FromChat backend (default: %(default)s).",
+    )
+    args = parser.parse_args(list(argv) if argv is not None else None)
+    cli = AdminCLI(args.api_url)
+    cli.run()
+
+
+if __name__ == "__main__":
+    main()
+

backend/alembic.ini

@@ -0,0 +1,147 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts.
+# this is typically a path given in POSIX (e.g. forward slashes)
+# format, relative to the token %(here)s which refers to the location of this
+# ini file
+script_location = alembic
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.  for multiple paths, the path separator
+# is defined by "path_separator" below.
+prepend_sys_path = .
+
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python>=3.9 or backports.zoneinfo library and tzdata library.
+# Any required deps can installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to ZoneInfo()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to <script_location>/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "path_separator"
+# below.
+# version_locations = %(here)s/bar:%(here)s/bat:%(here)s/alembic/versions
+
+# path_separator; This indicates what character is used to split lists of file
+# paths, including version_locations and prepend_sys_path within configparser
+# files such as alembic.ini.
+# The default rendered in new alembic.ini files is "os", which uses os.pathsep
+# to provide os-dependent path splitting.
+#
+# Note that in order to support legacy alembic.ini files, this default does NOT
+# take place if path_separator is not present in alembic.ini.  If this
+# option is omitted entirely, fallback logic is as follows:
+#
+# 1. Parsing of the version_locations option falls back to using the legacy
+#    "version_path_separator" key, which if absent then falls back to the legacy
+#    behavior of splitting on spaces and/or commas.
+# 2. Parsing of the prepend_sys_path option falls back to the legacy
+#    behavior of splitting on spaces, commas, or colons.
+#
+# Valid values for path_separator are:
+#
+# path_separator = :
+# path_separator = ;
+# path_separator = space
+# path_separator = newline
+#
+# Use os.pathsep. Default configuration used for new projects.
+path_separator = os
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# database URL.  This is consumed by the user-maintained env.py script only.
+# other means of configuring database URLs may be customized within the env.py
+# file.
+# sqlalchemy.url is set dynamically from DATABASE_URL environment variable
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# lint with attempts to fix using "ruff" - use the module runner, against the "ruff" module
+# hooks = ruff
+# ruff.type = module
+# ruff.module = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Alternatively, use the exec runner to execute a binary found on your PATH
+# hooks = ruff
+# ruff.type = exec
+# ruff.executable = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Logging configuration.  This is also consumed by the user-maintained
+# env.py script only.
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARNING
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARNING
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

backend/alembic/env.py

@@ -0,0 +1,78 @@
+from logging.config import fileConfig
+import logging
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+from backend.shared.models import Base
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

backend/alembic/script.py.mako

@@ -0,0 +1,28 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, Sequence[str], None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}

backend/app.py

@@ -1,21 +1,194 @@
-from fastapi import FastAPI
+import asyncio
+import time
+from fastapi import FastAPI, Request, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
+from contextlib import asynccontextmanager
+import subprocess
+import sys
+import os
+import httpx
+import logging
+# Gateway doesn't need direct model access - it's a stateless proxy
+# Gateway doesn't need constants - it's a stateless proxy
+from backend.shared.utils import get_client_ip
 
-from routes import account, messaging, profile
+# Gateway doesn't need database access - it's a stateless proxy
+from backend.logging_config import access_logger  # noqa: F401 - ensure loggers configured
+from backend.security.audit import log_access
+from backend.security.rate_limit import limiter
+from slowapi.middleware import SlowAPIMiddleware
+
+# Service URL mapping for routing
+SERVICE_URLS = {
+    "account": os.getenv("ACCOUNT_SERVICE_URL", "http://account_service:8302"),
+    "profile": os.getenv("PROFILE_SERVICE_URL", "http://profile_service:8303"),
+    "devices": os.getenv("DEVICE_SERVICE_URL", "http://device_service:8304"),
+    "messaging": os.getenv("MESSAGING_SERVICE_URL", "http://messaging_service:8305"),
+    "push": os.getenv("PUSH_SERVICE_URL", "http://push_service:8306"),
+    "webrtc": os.getenv("WEBRTC_SERVICE_URL", "http://webrtc_service:8307"),
+    "moderation": os.getenv("MODERATION_SERVICE_URL", "http://moderation_service:8308"),
+}
+
+logger = logging.getLogger("uvicorn.error")
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    # Gateway is a stateless proxy - no database operations or background tasks needed
+    logger.info("Gateway proxy service initialized - routing to microservices")
+    yield
+    logger.info("Gateway proxy service shutting down.")
 
 # Инициализация FastAPI
-app = FastAPI(title="PixelChat")
+app = FastAPI(title="FromChat", lifespan=lifespan)
+
+# Add rate limiting middleware
+app.state.limiter = limiter
+app.add_middleware(SlowAPIMiddleware)
+
+
+@app.middleware("http")
+async def access_logging_middleware(request: Request, call_next):
+    # Log incoming request and Authorization header presence for debugging auth issues
+    try:
+        auth_header = request.headers.get("authorization")
+        if auth_header:
+            short = auth_header[:20] + "..." if len(auth_header) > 20 else auth_header
+            logger.info("Incoming request %s %s Authorization=%s", request.method, request.url.path, short)
+        else:
+            logger.info("Incoming request %s %s Authorization=NONE", request.method, request.url.path)
+    except Exception:
+        pass
+    start = time.perf_counter()
+    try:
+        response = await call_next(request)
+    except Exception as exc:
+        duration = time.perf_counter() - start
+        user = getattr(getattr(request, "state", None), "current_user", None)
+        log_access(
+            "http_error",
+            method=request.method,
+            path=request.url.path,
+            status="error",
+            user=getattr(user, "username", None),
+            ip=get_client_ip(request),
+            duration=f"{duration:.3f}s",
+            error=str(exc),
+        )
+        raise
+    else:
+        duration = time.perf_counter() - start
+        user = getattr(getattr(request, "state", None), "current_user", None)
+        log_access(
+            "http_request",
+            method=request.method,
+            path=request.url.path,
+            status=response.status_code,
+            user=getattr(user, "username", None),
+            ip=get_client_ip(request),
+            duration=f"{duration:.3f}s",
+        )
+        return response
+
 
 # CORS
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=["*"],  # В продакшене замените на нужные домены
+    allow_origins=[
+        "https://fromchat.ru",
+        "https://beta.fromchat.ru",
+        "https://www.fromchat.ru",
+        "http://127.0.0.1:8301",
+        "http://127.0.0.1:8300",
+        "http://localhost:8301",
+        "http://localhost:8300",
+    ],
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],
 )
 
-# Routes
-app.include_router(account.router)
-app.include_router(messaging.router)
-app.include_router(profile.router)
+# Common API endpoints - route to appropriate services (defined first for priority)
+@app.api_route("/login", methods=["POST"])
+async def login(request: Request):
+    """Login endpoint - routes to account service."""
+    return await _proxy_to_service("account", "login", request)
+
+@app.api_route("/register", methods=["POST"])
+async def register(request: Request):
+    """Register endpoint - routes to account service."""
+    return await _proxy_to_service("account", "register", request)
+
+
+# API routes - route to appropriate microservices
+@app.api_route("/account/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"])
+async def proxy_account(path: str, request: Request):
+    """Proxy account service requests."""
+    return await _proxy_to_service("account", path, request)
+
+@app.api_route("/profile/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"])
+async def proxy_profile(path: str, request: Request):
+    """Proxy profile service requests."""
+    return await _proxy_to_service("profile", path, request)
+
+@app.api_route("/devices/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"])
+async def proxy_devices(path: str, request: Request):
+    """Proxy device service requests."""
+    return await _proxy_to_service("devices", path, request)
+
+@app.api_route("/messaging/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"])
+async def proxy_messaging(path: str, request: Request):
+    """Proxy messaging service requests."""
+    return await _proxy_to_service("messaging", path, request)
+
+@app.api_route("/push/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"])
+async def proxy_push(path: str, request: Request):
+    """Proxy push service requests."""
+    return await _proxy_to_service("push", path, request)
+
+@app.api_route("/webrtc/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"])
+async def proxy_webrtc(path: str, request: Request):
+    """Proxy WebRTC service requests."""
+    return await _proxy_to_service("webrtc", path, request)
+
+@app.api_route("/moderation/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"])
+async def proxy_moderation(path: str, request: Request):
+    """Proxy moderation service requests."""
+    return await _proxy_to_service("moderation", path, request)
+
+async def _proxy_to_service(service: str, path: str, request: Request):
+    """Helper function to proxy requests to microservices."""
+    from fastapi.responses import Response
+
+    service_url = SERVICE_URLS[service]
+    target_url = f"{service_url}/{service}/{path}"
+
+    # Get request body
+    body = await request.body()
+
+    # Prepare headers (remove host header)
+    headers = dict(request.headers)
+    headers.pop("host", None)
+
+    try:
+        async with httpx.AsyncClient(timeout=30.0) as client:
+            response = await client.request(
+                method=request.method,
+                url=target_url,
+                headers=headers,
+                content=body,
+                params=request.query_params,
+            )
+
+            # Return response with the same status code and content
+            content = response.content
+            return Response(
+                content=content,
+                status_code=response.status_code,
+                headers={"content-type": response.headers.get("content-type", "application/json")}
+            )
+    except httpx.RequestError as exc:
+        logging.error(f"Error communicating with {service} service: {exc}")
+        raise HTTPException(status_code=503, detail=f"Service {service} unavailable")
+
+# Routes are handled by the catch-all proxy above

backend/constants.py

@@ -1,9 +1,11 @@
 import os
 
-
 DATABASE_URL = "sqlite:///./data/database.db"
 JWT_ALGORITHM = "HS256"
-ACCESS_TOKEN_EXPIRE_HOURS = 24
+# Token inactivity expiration - token expires if not used for this duration
+TOKEN_INACTIVITY_EXPIRE_HOURS = 30 * 24  # 30 days of inactivity
+# Maximum token lifetime (safety net) - tokens expire after this regardless of usage
+MAX_TOKEN_LIFETIME_HOURS = 365 * 24  # 1 year maximum
 OWNER_USERNAME = "denis0001-dev"
 JWT_SECRET_KEY = os.getenv("JWT_SECRET")
 

backend/db.py

@@ -6,5 +6,35 @@ from constants import DATABASE_URL
 # Ensure data directory exists
 os.makedirs("data", exist_ok=True)
 
-engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
+POOL_SIZE = int(os.getenv("DB_POOL_SIZE", "20"))
+MAX_OVERFLOW = int(os.getenv("DB_MAX_OVERFLOW", "40"))
+POOL_RECYCLE = int(os.getenv("DB_POOL_RECYCLE", "1800"))
+POOL_TIMEOUT = int(os.getenv("DB_POOL_TIMEOUT", "30"))
+
+POOL_CONFIG = {
+    "pool_size": POOL_SIZE,
+    "max_overflow": MAX_OVERFLOW,
+    "pool_recycle": POOL_RECYCLE,
+    "pool_timeout": POOL_TIMEOUT,
+    "pool_pre_ping": True,
+}
+
+engine_kwargs = {
+    "pool_size": POOL_SIZE,
+    "max_overflow": MAX_OVERFLOW,
+    "pool_recycle": POOL_RECYCLE,
+    "pool_pre_ping": True,
+    "pool_timeout": POOL_TIMEOUT,
+}
+
+connect_args = {}
+if DATABASE_URL.startswith("sqlite"):
+    connect_args["check_same_thread"] = False
+
+engine = create_engine(
+    DATABASE_URL,
+    connect_args=connect_args,
+    **engine_kwargs,
+)
+
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

backend/dependencies.py

@@ -1,11 +1,14 @@
-from fastapi import Depends, HTTPException, status
+from datetime import datetime, timedelta
+from fastapi import Depends, HTTPException, Request, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 from sqlalchemy.orm import Session
-from utils import *
-from models import *
+from utils import verify_token
+from models import User, DeviceSession
 from db import SessionLocal
+import logging
 
 security = HTTPBearer()
+logger = logging.getLogger("uvicorn.error")
 
 # Зависимость для получения сессии БД
 def get_db():
@@ -17,12 +20,22 @@ def get_db():
 
 # Зависимость для получения текущего пользователя
 def get_current_user(
+    request: Request,
     credentials: HTTPAuthorizationCredentials = Depends(security),
-    db: Session = Depends(get_db)
+    db: Session = Depends(get_db),
 ) -> User:
     token = credentials.credentials
+    try:
         payload = verify_token(token)
+    except Exception as e:
+        logger.warning("get_current_user: token verification error: %s", str(e))
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid or expired token",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
     if not payload:
+        logger.info("get_current_user: verify_token returned empty payload")
         raise HTTPException(
             status_code=status.HTTP_401_UNAUTHORIZED,
             detail="Invalid or expired token",
@@ -30,9 +43,78 @@ def get_current_user(
         )
     user = db.query(User).filter(User.id == payload["user_id"]).first()
     if not user:
+        logger.info("get_current_user: user not found for user_id=%s", payload.get("user_id"))
         raise HTTPException(
             status_code=status.HTTP_401_UNAUTHORIZED,
             detail="User not found",
             headers={"WWW-Authenticate": "Bearer"},
         )
+
+    if user.id == 1 and user.suspended:
+        user.suspended = False
+        user.suspension_reason = None
+        db.commit()
+        db.refresh(user)
+
+    # Validate device session from JWT
+    session_id = payload.get("session_id")
+    if not session_id:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid session",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    device_session = (
+        db.query(DeviceSession)
+        .filter(DeviceSession.user_id == user.id, DeviceSession.session_id == session_id)
+        .first()
+    )
+
+    if not device_session or device_session.revoked:
+        logger.info("get_current_user: session missing/revoked for user_id=%s session_id=%s", user.id, session_id)
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Session revoked or not found",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    # Check if session has been inactive for too long (sliding expiration)
+    from constants import TOKEN_INACTIVITY_EXPIRE_HOURS
+    inactivity_threshold = datetime.now() - timedelta(hours=TOKEN_INACTIVITY_EXPIRE_HOURS)
+    if device_session.last_seen < inactivity_threshold:
+        # Session expired due to inactivity - revoke it
+        device_session.revoked = True
+        db.commit()
+        logger.info("get_current_user: session expired due to inactivity for user_id=%s session_id=%s", user.id, session_id)
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Session expired due to inactivity",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    # Touch last_seen on valid session (sliding expiration - extends token life)
+    device_session.last_seen = datetime.now()
+    db.commit()
+
+    # Check if user is suspended
+    if user.suspended:
+        logger.info("get_current_user: account suspended for user_id=%s reason=%s", user.id, user.suspension_reason)
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Account suspended",
+            headers={"suspension_reason": user.suspension_reason or "No reason provided"},
+        )
+
+    # Check if user is deleted
+    if user.deleted:
+        logger.info("get_current_user: account deleted for user_id=%s", user.id)
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Account deleted",
+        )
+
+    request.state.current_user = user
+    request.state.session_id = session_id
+
     return user

backend/generate_vapid_keys.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+"""
+Generate VAPID keys for push notifications
+Run this script to generate new VAPID keys for your application
+"""
+
+import sys
+import base64
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import ec
+from cryptography.hazmat.backends import default_backend
+
+def generate_vapid_keys():
+    """Generate VAPID keys for push notifications"""
+    try:
+        private_key = ec.generate_private_key(ec.SECP256R1(), default_backend())
+        public_key = private_key.public_key()
+        
+        # Convert to base64 for web push
+        private_key_b64 = base64.urlsafe_b64encode(
+            private_key.private_bytes(
+                encoding=serialization.Encoding.DER,
+                format=serialization.PrivateFormat.PKCS8,
+                encryption_algorithm=serialization.NoEncryption()
+            )
+        ).decode('utf-8').rstrip('=')
+        
+        # Get the raw uncompressed public key point (65 bytes: 0x04 + 32 bytes x + 32 bytes y)
+        public_numbers = public_key.public_numbers()
+        x_bytes = public_numbers.x.to_bytes(32, 'big')
+        y_bytes = public_numbers.y.to_bytes(32, 'big')
+        public_key_raw = b'\x04' + x_bytes + y_bytes
+        
+        public_key_b64 = base64.urlsafe_b64encode(public_key_raw).decode('utf-8').rstrip('=')
+        
+        print(f"VAPID_PRIVATE_KEY=\"{private_key_b64}\"")
+        print(f"VAPID_PUBLIC_KEY=\"{public_key_b64}\"")
+        
+        return private_key_b64, public_key_b64
+    except Exception as e:
+        print(f"Error generating VAPID keys: {e}", file=sys.stderr)
+        return None, None
+
+if __name__ == "__main__":
+    generate_vapid_keys()

backend/logging_config.py

@@ -0,0 +1,89 @@
+import logging
+import os
+from datetime import datetime
+from logging.handlers import RotatingFileHandler
+from pathlib import Path
+from threading import RLock
+from typing import Dict
+
+LOGS_DIR = Path(__file__).resolve().parent / "logs"
+LOGS_DIR.mkdir(parents=True, exist_ok=True)
+
+
+class HumanReadableFileHandler(RotatingFileHandler):
+    def __init__(self, filename: Path, level: int) -> None:
+        super().__init__(filename, maxBytes=5 * 1024 * 1024, backupCount=5, encoding="utf-8", delay=True)
+        self.level = level
+        self._lock = RLock()
+        self._last_date: str | None = None
+        self._previous_entry: str | None = None
+
+    def emit(self, record: logging.LogRecord) -> None:
+        try:
+            message = record.getMessage().strip()
+            if not message:
+                return
+
+            timestamp = datetime.fromtimestamp(record.created)
+            date_str = timestamp.strftime("%d.%m.%Y")
+            time_str = timestamp.strftime("%H:%M:%S")
+            lines = [line.rstrip() for line in message.splitlines() if line.strip()]
+
+            with self._lock:
+                if self.stream is None:
+                    self.stream = self._open()
+
+                if self._last_date != date_str:
+                    if self._last_date is not None:
+                        self.stream.write("\n")
+                    separator = "-" * 11
+                    self.stream.write(f"\n\n{separator}\n{date_str}\n{separator}\n\n")
+                    self._last_date = date_str
+
+                entry_lines: list[str] = []
+                if lines:
+                    entry_lines.append(f"{time_str} {lines[0]}")
+                    for line in lines[1:]:
+                        if line.startswith("|"):
+                            entry_lines.append(f"    {line}")
+                        else:
+                            entry_lines.append(f"  ↳ {line}")
+                else:
+                    entry_lines.append(time_str)
+                entry_text = "\n".join(entry_lines)
+                if entry_text == self._previous_entry:
+                    return
+                self.stream.write(entry_text + "\n")
+                self._previous_entry = entry_text
+                self.flush()
+        except Exception:
+            self.handleError(record)
+
+
+_HANDLED_FILES: Dict[str, Path] = {}
+
+
+def _configure_logger(name: str, filename: str, level: int = logging.INFO) -> logging.Logger:
+    logger = logging.getLogger(name)
+    target_path = LOGS_DIR / filename
+
+    if _HANDLED_FILES.get(name) == target_path:
+        return logger
+
+    logger.handlers.clear()
+
+    handler = HumanReadableFileHandler(target_path, level)
+    handler.setLevel(level)
+    logger.addHandler(handler)
+    logger.setLevel(level)
+    logger.propagate = False
+
+    _HANDLED_FILES[name] = target_path
+    return logger
+
+
+security_logger = _configure_logger("security", "security.log")
+public_chat_logger = _configure_logger("public_chat", "public-chat.log")
+dm_logger = _configure_logger("dm", "dm.log")
+access_logger = _configure_logger("access", "access.log")
+

backend/main.py

@@ -1,7 +1,7 @@
-from constants import *
-from db import *
-from models import *
-from validation import *
-from utils import *
-from dependencies import *
+from backend.shared.constants import *
+from backend.shared.db import *
+from backend.shared.models import *
+from backend.shared.validation import *
+from backend.shared.utils import *
+from backend.shared.dependencies import *
 from app import *

backend/migration.py

@@ -0,0 +1,645 @@
+"""
+Database migration utility using Alembic.
+This module handles running database migrations on startup.
+"""
+import os
+import logging
+from alembic import command
+from alembic.config import Config
+from alembic.runtime.migration import MigrationContext
+from sqlalchemy import create_engine
+from backend.shared.constants import DATABASE_URL
+import logging
+
+logger = logging.getLogger(__name__)
+
+def run_migrations():
+    """
+    Run database migrations using Alembic.
+    This function will upgrade the database to the latest migration.
+    Fully automated - handles all scenarios automatically.
+    """
+    # Get the directory where this script is located
+    current_dir = os.path.dirname(os.path.abspath(__file__))
+
+    try:
+        # FIRST: Check if database has any application tables (excluding alembic_version)
+        engine = create_engine(DATABASE_URL)
+        with engine.connect() as connection:
+            from sqlalchemy import inspect
+            inspector = inspect(connection)
+            existing_tables = [table for table in inspector.get_table_names()
+                             if not table.startswith('sqlite_') and table != 'alembic_version']
+
+        # If no application tables exist, create them directly from models
+        if not existing_tables:
+            logger.info("No application tables found. Creating all tables directly from models...")
+            from backend.shared.models import Base
+            Base.metadata.create_all(bind=engine)
+            logger.info("All tables created successfully from models.")
+
+        # Note: Problematic migrations are now cleaned up during Docker build
+
+        # Create Alembic configuration
+        alembic_cfg = Config(os.path.join(current_dir, "alembic.ini"))
+
+        # Disable Alembic's logging configuration to avoid interfering with FastAPI
+        alembic_cfg.set_main_option("configure_logging", "false")
+
+        # Set the database URL in the config
+        alembic_cfg.set_main_option("sqlalchemy.url", DATABASE_URL)
+
+        # Check if any migration files exist
+        versions_dir = os.path.join(current_dir, "alembic", "versions")
+
+        if not os.path.exists(versions_dir):
+            os.makedirs(versions_dir)
+
+        migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+
+        # If no migration files exist after cleanup, create initial migration
+        if not migration_files:
+            logger.info("No migration files found after cleanup. Creating initial migration...")
+            command.revision(alembic_cfg, autogenerate=True, message="Initial migration")
+            migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+            logger.info(f"Created {len(migration_files)} initial migration(s)")
+        
+        if not migration_files:
+            logger.info("No migration files found. Creating initial migration...")
+            # Check if database exists and has tables
+            engine = create_engine(DATABASE_URL)
+            with engine.connect() as connection:
+                from sqlalchemy import text
+                result = connection.execute(text("SELECT name FROM sqlite_master WHERE type='table' AND name != 'alembic_version'"))
+                existing_tables = result.fetchall()
+                
+                if existing_tables:
+                    logger.info("Found existing database with tables. Creating migration to match current schema...")
+                    # Create migration with autogenerate to detect differences
+                    command.revision(alembic_cfg, autogenerate=True, message="Initial migration from existing database")
+                    
+                    # Check if the generated migration is empty (common with existing databases)
+                    versions_dir = os.path.join(current_dir, "alembic", "versions")
+                    migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+                    if migration_files:
+                        latest_migration = max(migration_files)
+                        migration_path = os.path.join(versions_dir, latest_migration)
+                        
+                        # Check if migration is empty
+                        with open(migration_path, 'r') as f:
+                            content = f.read()
+                            if 'pass' in content and 'op.create_table' not in content and 'op.add_column' not in content:
+                                logger.info("Generated migration is empty. Creating complete schema migration...")
+                                # Remove the empty migration
+                                os.remove(migration_path)
+                                # Create a complete migration
+                                _create_complete_migration(alembic_cfg)
+                else:
+                    logger.info("No existing tables found. Creating fresh migration...")
+                    # Create fresh migration
+                    command.revision(alembic_cfg, autogenerate=True, message="Initial migration")
+            logger.info("Initial migration created successfully.")
+        else:
+            # Migration files exist, check if we need to create a new migration for schema changes
+            logger.info("Migration files exist. Checking for pending schema changes...")
+            try:
+                # Create a new migration to detect any schema changes
+                command.revision(alembic_cfg, autogenerate=True, message="Auto-generated migration for schema changes")
+                
+                # Check if the new migration is empty (no changes detected)
+                migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+                if migration_files:
+                    latest_migration = max(migration_files)
+                    migration_path = os.path.join(versions_dir, latest_migration)
+                    
+                    # Check if migration is empty
+                    with open(migration_path, 'r') as f:
+                        content = f.read()
+                        if 'pass' in content and 'op.create_table' not in content and 'op.add_column' not in content and 'op.drop_table' not in content and 'op.drop_column' not in content:
+                            logger.info("No schema changes detected. Removing empty migration...")
+                            # Remove the empty migration
+                            os.remove(migration_path)
+                        else:
+                            logger.info("Schema changes detected. New migration created.")
+                            
+            except Exception as e:
+                logger.info(f"No new migrations needed or error creating migration: {e}")
+                pass
+        
+        # Check if database is in an inconsistent state (has alembic_version but no tables)
+        engine = create_engine(DATABASE_URL)
+        with engine.connect() as connection:
+            from sqlalchemy import text, inspect
+            inspector = inspect(connection)
+            existing_tables = inspector.get_table_names()
+            
+            # Check if we have alembic_version but no actual tables
+            if 'alembic_version' in existing_tables and len(existing_tables) == 1:
+                logger.info("Database has alembic_version but no actual tables - resetting migration state...")
+                # Clear alembic_version and start fresh
+                connection.execute(text("DELETE FROM alembic_version"))
+                connection.commit()
+                logger.info("Reset migration state - will create fresh migration")
+        
+        # Run the upgrade command
+        logger.info("Running database migrations...")
+        try:
+            command.upgrade(alembic_cfg, "head")
+            logger.info("Database migrations completed successfully.")
+        except Exception as upgrade_error:
+            error_msg = str(upgrade_error)
+            # Handle PostgreSQL "already exists" errors gracefully
+            if "already exists" in error_msg.lower() or "relation" in error_msg.lower() and "exists" in error_msg.lower():
+                pass
+            elif "Can't locate revision identified by 'direct_creation'" in error_msg:
+                logger.info("Found 'direct_creation' revision - resetting migration state...")
+                # Clear the alembic_version table and start fresh
+                engine = create_engine(DATABASE_URL)
+                with engine.connect() as connection:
+                    from sqlalchemy import text
+                    connection.execute(text("DELETE FROM alembic_version"))
+                    connection.commit()
+                
+                # Set the correct revision in alembic_version table
+                current_dir = os.path.dirname(os.path.abspath(__file__))
+                versions_dir = os.path.join(current_dir, "alembic", "versions")
+                migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+                
+                if migration_files:
+                    # Get the latest migration file and extract its revision ID
+                    latest_migration = max(migration_files)
+                    migration_path = os.path.join(versions_dir, latest_migration)
+                    
+                    with open(migration_path, 'r') as f:
+                        content = f.read()
+                        # Extract revision ID from the file
+                        import re
+                        revision_match = re.search(r"revision: str = '([^']+)'", content)
+                        if revision_match:
+                            revision_id = revision_match.group(1)
+                            logger.info(f"Setting alembic_version to {revision_id}")
+                            connection.execute(text(f"INSERT INTO alembic_version (version_num) VALUES ('{revision_id}')"))
+                            connection.commit()
+                
+                # Try upgrade again
+                command.upgrade(alembic_cfg, "head")
+                logger.info("Database migrations completed successfully after reset.")
+            elif "no such table" in str(upgrade_error).lower():
+                logger.info("Database tables missing - resetting migration state...")
+                # Clear the alembic_version table and start fresh
+                engine = create_engine(DATABASE_URL)
+                with engine.connect() as connection:
+                    from sqlalchemy import text
+                    connection.execute(text("DELETE FROM alembic_version"))
+                    connection.commit()
+
+                # Try upgrade again
+                command.upgrade(alembic_cfg, "head")
+                logger.info("Database migrations completed successfully after reset.")
+            # Note: Index-related errors are now prevented by Docker build cleanup
+            else:
+                raise upgrade_error
+        
+    except Exception as e:
+        logger.error(f"Error running database migrations: {e}")
+        # Fully automated recovery - handle ALL error scenarios
+        logger.info("Attempting automated recovery...")
+        try:
+            # Clear the alembic_version table to reset state
+            engine = create_engine(DATABASE_URL)
+            with engine.connect() as connection:
+                from sqlalchemy import text
+                connection.execute(text("DROP TABLE IF EXISTS alembic_version"))
+                connection.commit()
+            
+            # Check if we have existing migration files
+            versions_dir = os.path.join(current_dir, "alembic", "versions")
+            migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+            
+            if migration_files:
+                # We have migration files, just fix the alembic_version table
+                logger.info("Found existing migration files, fixing alembic_version table...")
+                latest_migration = max(migration_files)
+                migration_path = os.path.join(versions_dir, latest_migration)
+                
+                with open(migration_path, 'r') as f:
+                    content = f.read()
+                    import re
+                    revision_match = re.search(r"revision: str = '([^']+)'", content)
+                    if revision_match:
+                        revision_id = revision_match.group(1)
+                        logger.info(f"Setting alembic_version to {revision_id}")
+                        connection.execute(text(f"INSERT INTO alembic_version (version_num) VALUES ('{revision_id}')"))
+                        connection.commit()
+                
+                # Try upgrade again
+                command.upgrade(alembic_cfg, "head")
+                logger.info("Automated recovery completed successfully.")
+            else:
+                # No migration files, create fresh ones
+                logger.info("No migration files found, creating fresh migration...")
+                _create_complete_migration(alembic_cfg)
+                
+                # Run the migration
+                command.upgrade(alembic_cfg, "head")
+                logger.info("Automated recovery completed successfully.")
+            
+        except Exception as recovery_error:
+            logger.error(f"Automated recovery failed: {recovery_error}")
+            # Last resort: create database using SQLAlchemy directly
+            logger.info("Using fallback: creating database directly...")
+            _create_database_directly()
+            logger.info("Database created successfully using fallback method.")
+
+
+def _create_complete_migration(alembic_cfg):
+    """Create a complete migration file with all database schema."""
+    # Create a new migration file
+    command.revision(alembic_cfg, message="Complete schema migration")
+    
+    # Get the latest migration file
+    versions_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "alembic", "versions")
+    migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+    latest_migration = max(migration_files) if migration_files else None
+    
+    if latest_migration:
+        migration_path = os.path.join(versions_dir, latest_migration)
+        _populate_migration_file(migration_path)
+
+
+def _populate_migration_file(migration_path):
+    """Populate a migration file with the complete database schema from models."""
+    # Generate the migration content dynamically from models
+    migration_content = _generate_migration_from_models()
+    
+    # Read the current migration file
+    with open(migration_path, 'r') as f:
+        content = f.read()
+    
+    # Add datetime import if needed
+    if "datetime.now" in migration_content and "from datetime import datetime" not in content:
+        # Insert the import after the existing imports
+        import re
+        content = re.sub(
+            r'(from alembic import op\nimport sqlalchemy as sa\n)',
+            r'\1from datetime import datetime\n',
+            content
+        )
+    
+    # Replace the empty upgrade/downgrade functions
+    import re
+    # More flexible regex to match the actual content
+    content = re.sub(
+        r'def upgrade\(\) -> None:.*?pass.*?(?=\n\ndef downgrade|\n\nif __name__|\Z)',
+        migration_content,
+        content,
+        flags=re.DOTALL
+    )
+    
+    # Write the updated content back
+    with open(migration_path, 'w') as f:
+        f.write(content)
+
+
+def _generate_migration_from_models():
+    """Generate migration content dynamically from SQLAlchemy models."""
+    from backend.shared.models import Base
+    import sqlalchemy as sa
+    from datetime import datetime
+    
+    # Generate migration content using Alembic's op functions
+    upgrade_statements = []
+    downgrade_statements = []
+    
+    # Get all tables from Base metadata
+    for table_name, table in Base.metadata.tables.items():
+        if table_name != 'alembic_version':  # Skip alembic_version table
+            # Check if table exists and compare schema
+            schema_diff = _detect_schema_differences(table_name, table)
+            
+            if schema_diff['table_exists']:
+                if schema_diff['needs_update']:
+                    # Generate ALTER TABLE statements for existing table
+                    upgrade_statements.append(f"    # Update {table_name} table schema")
+                    for statement in schema_diff['alter_statements']:
+                        upgrade_statements.append(f"    {statement}")
+                else:
+                    # Table exists and is up to date - skip creating it
+                    upgrade_statements.append(f"    # Table {table_name} already exists and is up to date")
+            else:
+                # Generate CREATE TABLE for new table
+                table_code = _generate_table_creation_code(table_name, table)
+                upgrade_statements.append(f"    # Create {table_name} table")
+                upgrade_statements.append(table_code)
+            
+            # Only add to downgrade if table actually exists
+            if schema_diff['table_exists']:
+                downgrade_statements.append(f"    # op.drop_table('{table_name}')  # Skipped - table exists")
+            else:
+                downgrade_statements.append(f"    op.drop_table('{table_name}')")
+    
+    # Combine all statements
+    upgrade_content = "def upgrade() -> None:\n    \"\"\"Upgrade schema.\"\"\"\n" + "\n".join(upgrade_statements)
+    downgrade_content = "def downgrade() -> None:\n    \"\"\"Downgrade schema.\"\"\"\n" + "\n".join(downgrade_statements)
+    
+    return upgrade_content + "\n\n" + downgrade_content
+
+
+def _detect_schema_differences(table_name, expected_table):
+    """Detect differences between existing table and expected schema."""
+    engine = create_engine(DATABASE_URL)
+    
+    with engine.connect() as connection:
+        from sqlalchemy import text, inspect
+        
+        # Check if table exists
+        inspector = inspect(connection)
+        if table_name not in inspector.get_table_names():
+            return {
+                'table_exists': False,
+                'needs_update': False,
+                'alter_statements': []
+            }
+        
+        # Get existing columns
+        existing_columns = inspector.get_columns(table_name)
+        existing_column_names = {col['name'] for col in existing_columns}
+        
+        # Get expected columns
+        expected_column_names = {col.name for col in expected_table.columns}
+        
+        # Check for missing columns
+        missing_columns = expected_column_names - existing_column_names
+        extra_columns = existing_column_names - expected_column_names
+        
+        alter_statements = []
+        
+        # Add missing columns
+        for column in expected_table.columns:
+            if column.name in missing_columns:
+                column_def = _generate_column_definition(column)
+                alter_statements.append(f"op.add_column('{table_name}', {column_def})")
+        
+        # Add missing indexes
+        for index in expected_table.indexes:
+            if not index.unique:
+                cols = "', '".join([col.name for col in index.columns])
+                alter_statements.append(f"op.create_index(op.f('ix_{table_name}_{index.name}'), '{table_name}', ['{cols}'], unique=False)")
+        
+        return {
+            'table_exists': True,
+            'needs_update': len(alter_statements) > 0,
+            'alter_statements': alter_statements
+        }
+
+
+def _generate_column_definition(column):
+    """Generate column definition for ALTER TABLE."""
+    type_def = _get_column_type(column)
+    nullable = "nullable=True" if column.nullable else "nullable=False"
+    
+    definition = f"sa.Column('{column.name}', {type_def}, {nullable}"
+    
+    # Handle default values properly
+    if column.default is not None:
+        if hasattr(column.default, 'arg'):
+            # Handle callable defaults
+            if callable(column.default.arg):
+                definition += f", default=datetime.now"
+            else:
+                definition += f", default={repr(column.default.arg)}"
+        else:
+            definition += f", default={repr(column.default)}"
+    
+    definition += ")"
+    return definition
+
+
+def _generate_table_creation_code(table_name, table):
+    """Generate op.create_table code for a SQLAlchemy table."""
+    lines = [f"    op.create_table('{table_name}',"]
+    
+    # Collect all table items (columns + constraints)
+    all_items = []
+    
+    # Add columns
+    for column in table.columns:
+        column_def = f"        sa.Column('{column.name}', {_get_column_type(column)}, nullable={column.nullable}"
+        if column.default is not None:
+            # Handle callable defaults properly
+            if hasattr(column.default, 'arg') and callable(column.default.arg):
+                column_def += f", default=datetime.now"
+            else:
+                column_def += f", default={repr(column.default)}"
+        column_def += ")"
+        all_items.append(column_def)
+    
+    # Add constraints
+    for constraint in table.constraints:
+        if hasattr(constraint, 'columns'):
+            if constraint.__class__.__name__ == 'PrimaryKeyConstraint':
+                all_items.append(f"        sa.PrimaryKeyConstraint('{constraint.columns.keys()[0]}')")
+            elif constraint.__class__.__name__ == 'UniqueConstraint':
+                cols = "', '".join(constraint.columns.keys())
+                all_items.append(f"        sa.UniqueConstraint('{cols}')")
+    
+    # Add foreign key constraints
+    for fk in table.foreign_keys:
+        all_items.append(f"        sa.ForeignKeyConstraint(['{fk.parent.name}'], ['{fk.column.table.name}.{fk.column.name}'], )")
+    
+    # Add all items with commas (except the last one)
+    for i, item in enumerate(all_items):
+        if i < len(all_items) - 1:
+            item += ","
+        lines.append(item)
+    
+    lines.append("    )")
+    
+    # Add indexes with IF NOT EXISTS equivalent using try/except
+    for index in table.indexes:
+        if not index.unique:
+            cols = "', '".join([col.name for col in index.columns])
+            lines.append(f"    # Create index for {table_name}")
+            lines.append(f"    try:")
+            lines.append(f"        op.create_index(op.f('ix_{table_name}_{index.name}'), '{table_name}', ['{cols}'], unique=False)")
+            lines.append(f"    except Exception:")
+            lines.append(f"        pass  # Index may already exist")
+    
+    return "\n".join(lines)
+
+
+def _get_column_type(column):
+    """Get SQLAlchemy column type string."""
+    type_name = column.type.__class__.__name__
+    
+    if type_name == 'String':
+        return f"sa.String(length={column.type.length})"
+    elif type_name == 'Integer':
+        return "sa.Integer()"
+    elif type_name == 'Text':
+        return "sa.Text()"
+    elif type_name == 'Boolean':
+        return "sa.Boolean()"
+    elif type_name == 'DateTime':
+        return "sa.DateTime()"
+    else:
+        return f"sa.{type_name}()"
+
+
+def _create_database_directly():
+    """Fallback method: create database directly using SQLAlchemy."""
+    from backend.shared.models import Base
+    from backend.shared.db import get_engine
+    from sqlalchemy import text, inspect
+
+    engine = get_engine()
+
+    # Check existing tables and update schema
+    with engine.connect() as connection:
+        inspector = inspect(connection)
+        existing_tables = inspector.get_table_names()
+        
+        # For each model table, check if it needs updates
+        for table_name, table in Base.metadata.tables.items():
+            if table_name != 'alembic_version':
+                if table_name in existing_tables:
+                    # Table exists, check for missing columns
+                    existing_columns = {col['name'] for col in inspector.get_columns(table_name)}
+                    expected_columns = {col.name for col in table.columns}
+                    missing_columns = expected_columns - existing_columns
+                    
+                    # Add missing columns
+                    for column in table.columns:
+                        if column.name in missing_columns:
+                            # Convert to raw SQL for direct execution
+                            sql_type = _get_sql_type(column)
+                            nullable = "NULL" if column.nullable else "NOT NULL"
+                            
+                            # Handle datetime columns without default (SQLite limitation)
+                            if column.type.__class__.__name__ == 'DateTime':
+                                # Add column without default, then update existing rows
+                                alter_sql = f"ALTER TABLE {table_name} ADD COLUMN {column.name} {sql_type} {nullable}"
+                                try:
+                                    connection.execute(text(alter_sql))
+                                    logger.info(f"Added column {column.name} to {table_name}")
+                                    
+                                    # Update existing rows with current timestamp
+                                    update_sql = f"UPDATE {table_name} SET {column.name} = CURRENT_TIMESTAMP WHERE {column.name} IS NULL"
+                                    connection.execute(text(update_sql))
+                                    logger.info(f"Updated {column.name} with current timestamp")
+                                except Exception as e:
+                                    logger.error(f"Could not add column {column.name}: {e}")
+                            else:
+                                # Handle other column types with defaults
+                                default_clause = ""
+                                if column.default is not None:
+                                    if hasattr(column.default, 'arg') and callable(column.default.arg):
+                                        # Skip callable defaults for SQLite compatibility
+                                        pass
+                                    elif hasattr(column.default, 'arg'):
+                                        default_clause = f" DEFAULT {repr(column.default.arg)}"
+                                
+                                alter_sql = f"ALTER TABLE {table_name} ADD COLUMN {column.name} {sql_type} {nullable}{default_clause}"
+                                try:
+                                    connection.execute(text(alter_sql))
+                                    logger.info(f"Added column {column.name} to {table_name}")
+                                except Exception as e:
+                                    logger.error(f"Could not add column {column.name}: {e}")
+                else:
+                    # Table doesn't exist, create it
+                    logger.info(f"Creating table {table_name}")
+        
+        # Create alembic_version table manually
+        engine = get_engine(DATABASE_URL)
+        with engine.connect() as connection:
+            # Create alembic_version table manually
+            connection.execute(text("""
+                CREATE TABLE IF NOT EXISTS alembic_version (
+                    version_num VARCHAR(32) NOT NULL,
+                    CONSTRAINT alembic_version_pkc PRIMARY KEY (version_num)
+                )
+            """))
+
+            # Get the correct revision ID from existing migration files
+            current_dir = os.path.dirname(os.path.abspath(__file__))
+            versions_dir = os.path.join(current_dir, "alembic", "versions")
+            migration_files = [f for f in os.listdir(versions_dir) if f.endswith('.py') and not f.startswith('__')]
+
+            if migration_files:
+                latest_migration = max(migration_files)
+                migration_path = os.path.join(versions_dir, latest_migration)
+
+                with open(migration_path, 'r') as f:
+                    content = f.read()
+                    import re
+                    revision_match = re.search(r"revision: str = '([^']+)'", content)
+                    if revision_match:
+                        revision_id = revision_match.group(1)
+                        connection.execute(text(f"INSERT INTO alembic_version (version_num) VALUES ('{revision_id}') ON CONFLICT DO NOTHING"))
+                    else:
+                        connection.execute(text("INSERT INTO alembic_version (version_num) VALUES ('direct_creation') ON CONFLICT DO NOTHING"))
+            else:
+                connection.execute(text("INSERT OR IGNORE INTO alembic_version (version_num) VALUES ('direct_creation')"))
+
+            connection.commit()
+
+
+def _get_sql_type(column):
+    """Get SQL type for direct SQL execution."""
+    type_name = column.type.__class__.__name__
+    
+    if type_name == 'String':
+        return f"VARCHAR({column.type.length})"
+    elif type_name == 'Integer':
+        return "INTEGER"
+    elif type_name == 'Text':
+        return "TEXT"
+    elif type_name == 'Boolean':
+        return "BOOLEAN"
+    elif type_name == 'DateTime':
+        return "DATETIME"
+    else:
+        return "TEXT"  # fallback
+
+
+def check_migration_status():
+    """
+    Check if the database needs migrations.
+    Returns True if migrations are needed, False otherwise.
+    """
+    try:
+        # Create engine
+        engine = create_engine(DATABASE_URL)
+        
+        # Check if alembic_version table exists
+        with engine.connect() as connection:
+            # Check if alembic_version table exists
+            from sqlalchemy import text
+            result = connection.execute(
+                text("SELECT name FROM sqlite_master WHERE type='table' AND name='alembic_version'")
+            )
+            alembic_table_exists = result.fetchone() is not None
+            
+            if not alembic_table_exists:
+                return True
+            
+            # Get current migration context
+            context = MigrationContext.configure(connection)
+            current_rev = context.get_current_revision()
+            
+            # Get the latest revision from alembic
+            current_dir = os.path.dirname(os.path.abspath(__file__))
+            alembic_cfg = Config(os.path.join(current_dir, "alembic.ini"))
+            script_dir = command.ScriptDirectory.from_config(alembic_cfg)
+            head_rev = script_dir.get_current_head()
+            
+            return current_rev != head_rev
+            
+    except Exception as e:
+        logger.error(f"Error checking migration status: {e}")
+        return True  # Assume migrations are needed if we can't check
+
+
+if __name__ == "__main__":
+    # This allows running migrations directly
+    run_migrations()

backend/models.py

@@ -1,8 +1,7 @@
 from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey, inspect, text
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey, inspect, null, text, UniqueConstraint
 from sqlalchemy.orm import relationship
 from datetime import datetime
-from db import engine
 from pydantic import BaseModel
 
 Base = declarative_base()
@@ -14,12 +13,17 @@ class User(Base):
 
     id = Column(Integer, primary_key=True, index=True)
     username = Column(String(50), unique=True, nullable=False, index=True)
+    display_name = Column(String(64), nullable=False)
     password_hash = Column(String(200), nullable=False)
     profile_picture = Column(String(255), nullable=True)
     bio = Column(Text, nullable=True)
     online = Column(Boolean, default=False)
     last_seen = Column(DateTime, default=datetime.now)
     created_at = Column(DateTime, default=datetime.now)
+    verified = Column(Boolean, default=False)
+    suspended = Column(Boolean, default=False)
+    suspension_reason = Column(Text, nullable=True)
+    deleted = Column(Boolean, default=False)
     messages = relationship("Message", back_populates="author", lazy="select")
 
 
@@ -36,8 +40,153 @@ class Message(Base):
 
     author = relationship("User", back_populates="messages")
     reply_to = relationship("Message", remote_side=[id])
+    files = relationship("MessageFile", back_populates="message", cascade="all, delete-orphan", lazy="select")
+    reactions = relationship("Reaction", cascade="all, delete-orphan", lazy="select")
 
 
+class MessageFile(Base):
+    __tablename__ = "message_file"
+
+    id = Column(Integer, primary_key=True, index=True)
+    message_id = Column(Integer, ForeignKey("message.id"), nullable=False, index=True)
+    path = Column(Text, nullable=False)
+    name = Column(Text, nullable=False)
+
+    message = relationship("Message", back_populates="files")
+
+
+class CryptoPublicKey(Base):
+    __tablename__ = "crypto_public_key"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False, unique=True)
+    public_key_b64 = Column(Text, nullable=False)
+
+
+class CryptoBackup(Base):
+    __tablename__ = "crypto_backup"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False, unique=True)
+    blob_json = Column(Text, nullable=False)
+
+
+class DMEnvelope(Base):
+    __tablename__ = "dm_envelope"
+
+    id = Column(Integer, primary_key=True, index=True)
+    sender_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    recipient_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    iv_b64 = Column(Text, nullable=False)
+    ciphertext_b64 = Column(Text, nullable=False)
+    salt_b64 = Column(Text, nullable=False)
+    iv2_b64 = Column(Text, nullable=False)
+    wrapped_mk_b64 = Column(Text, nullable=False)
+    reply_to_id = Column(Integer, nullable=True)
+    timestamp = Column(DateTime, default=datetime.now)
+    files = relationship("DMFile", back_populates="message", cascade="all, delete-orphan", lazy="select")
+    reactions = relationship("DMReaction", cascade="all, delete-orphan", lazy="select")
+
+
+class DMFile(Base):
+    __tablename__ = "dm_file"
+
+    id = Column(Integer, primary_key=True, index=True)
+    message_id = Column(Integer, ForeignKey("dm_envelope.id"), nullable=False, index=True)
+    sender_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    recipient_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    name = Column(Text, nullable=False)
+    path = Column(Text, nullable=False)
+
+    message = relationship("DMEnvelope", back_populates="files")
+
+
+class PushSubscription(Base):
+    __tablename__ = "push_subscription"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    endpoint = Column(Text, nullable=False)
+    p256dh_key = Column(Text, nullable=False)
+    auth_key = Column(Text, nullable=False)
+    created_at = Column(DateTime, default=datetime.now)
+    updated_at = Column(DateTime, default=datetime.now, onupdate=datetime.now)
+
+
+class FcmToken(Base):
+    __tablename__ = "fcm_token"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False, index=True)
+    token = Column(Text, nullable=False, unique=True)
+    created_at = Column(DateTime, default=datetime.now)
+    updated_at = Column(DateTime, default=datetime.now, onupdate=datetime.now)
+
+
+class Reaction(Base):
+    __tablename__ = "reaction"
+
+    id = Column(Integer, primary_key=True, index=True)
+    message_id = Column(Integer, ForeignKey("message.id"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    emoji = Column(String(10), nullable=False)  # Store emoji as string
+    timestamp = Column(DateTime, default=datetime.now)
+    
+    # Relationships
+    user = relationship("User")
+    
+    # Ensure unique combination of message, user, and emoji
+    __table_args__ = (UniqueConstraint('message_id', 'user_id', 'emoji', name='unique_reaction'),)
+
+
+class DMReaction(Base):
+    __tablename__ = "dm_reaction"
+
+    id = Column(Integer, primary_key=True, index=True)
+    dm_envelope_id = Column(Integer, ForeignKey("dm_envelope.id"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    emoji = Column(String(10), nullable=False)  # Store emoji as string
+    timestamp = Column(DateTime, default=datetime.now)
+    
+    # Relationships
+    user = relationship("User")
+    dm_envelope = relationship("DMEnvelope", overlaps="reactions")
+    
+    # Ensure unique combination of dm_envelope, user, and emoji
+    __table_args__ = (UniqueConstraint('dm_envelope_id', 'user_id', 'emoji', name='unique_dm_reaction'),)
+
+
+# Tracks authenticated device sessions per user
+class DeviceSession(Base):
+    __tablename__ = "device_session"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False, index=True)
+
+    # Raw User-Agent for reference/debugging
+    raw_user_agent = Column(Text, nullable=True)
+
+    # Parsed fields
+    device_name = Column(String(128), nullable=True)
+    device_type = Column(String(32), nullable=True)  # desktop/mobile/tablet/bot/unknown
+    os_name = Column(String(64), nullable=True)
+    os_version = Column(String(64), nullable=True)
+    browser_name = Column(String(64), nullable=True)
+    browser_version = Column(String(64), nullable=True)
+    brand = Column(String(64), nullable=True)
+    model = Column(String(64), nullable=True)
+
+    # Session identity embedded into JWTs
+    session_id = Column(String(64), unique=True, nullable=False, index=True)
+
+    # Lifecycle
+    created_at = Column(DateTime, default=datetime.now)
+    last_seen = Column(DateTime, default=datetime.now)
+    revoked = Column(Boolean, default=False)
+
+    # Relationship back to user (optional lazy to avoid heavy loads)
+    user = relationship("User", lazy="select")
+
 # Pydantic модели
 class LoginRequest(BaseModel):
     username: str
@@ -46,23 +195,26 @@ class LoginRequest(BaseModel):
 
 class RegisterRequest(BaseModel):
     username: str
+    display_name: str
     password: str
     confirm_password: str
 
 
+class ChangePasswordRequest(BaseModel):
+    currentPasswordDerived: str
+    newPasswordDerived: str
+    logoutAllExceptCurrent: bool = False
+
+
 class SendMessageRequest(BaseModel):
     content: str
+    reply_to_id: int | None = None
 
 
 class EditMessageRequest(BaseModel):
     content: str
 
 
-class ReplyMessageRequest(BaseModel):
-    content: str
-    reply_to_id: int
-
-
 class DeleteMessageRequest(BaseModel):
     message_id: int
 
@@ -71,14 +223,24 @@ class UpdateBioRequest(BaseModel):
     bio: str
 
 
+class PushSubscriptionRequest(BaseModel):
+    endpoint: str
+    keys: dict
+
+
 class UserProfileResponse(BaseModel):
     id: int
     username: str
+    display_name: str
     profile_picture: str | None
     bio: str | None
     online: bool
-    last_seen: datetime
-    created_at: datetime
+    last_seen: datetime | None
+    created_at: datetime | None
+    verified: bool
+    suspended: bool
+    suspension_reason: str | None
+    deleted: bool
 
     class Config:
         from_attributes = True
@@ -97,5 +259,54 @@ class MessageResponse(BaseModel):
         from_attributes = True
 
 
-# Создание таблиц
-Base.metadata.create_all(bind=engine)
+class ReactionRequest(BaseModel):
+    message_id: int
+    emoji: str
+
+
+class ReactionResponse(BaseModel):
+    id: int
+    message_id: int
+    user_id: int
+    emoji: str
+    timestamp: datetime
+    username: str
+
+    class Config:
+        from_attributes = True
+
+
+class DMReactionRequest(BaseModel):
+    dm_envelope_id: int
+    emoji: str
+
+
+class DMReactionResponse(BaseModel):
+    id: int
+    dm_envelope_id: int
+    user_id: int
+    emoji: str
+    timestamp: datetime
+    username: str
+
+    class Config:
+        from_attributes = True
+
+
+class UpdateLog(Base):
+    """Stores update sequence numbers and updates for gap detection"""
+    __tablename__ = "update_log"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False, index=True)
+    sequence = Column(Integer, nullable=False, index=True)
+    updates = Column(Text, nullable=False)  # JSON array of updates
+    timestamp = Column(DateTime, default=datetime.now, index=True)
+
+    __table_args__ = (
+        UniqueConstraint("user_id", "sequence", name="uq_user_sequence"),
+    )
+
+
+# Tables are now created through Alembic migrations
+# Base.metadata.create_all(bind=engine)

backend/requirements.txt

@@ -2,7 +2,18 @@ PyJWT>=2.8.0
 fastapi[standard]>=0.116.1
 pydantic>=2.11.7
 sqlalchemy>=2.0.43
+psycopg2-binary>=2.9.9
 bcrypt>=4.3.0
 websockets>=15.0.1
 Pillow>=10.0.0
 python-multipart>=0.0.6
+pywebpush>=1.14.0
+cryptography>=41.0.0
+alembic>=1.13.2
+better-profanity>=0.7.0
+user-agents>=2.2.0
+httpx>=0.27.2
+rich>=13.9.4
+slowapi>=0.1.9
+firebase_admin>=7.1.0
+PyNaCl>=1.5.0

backend/routes/account.py

@@ -1,24 +1,62 @@
 from datetime import datetime
-from fastapi import APIRouter, Depends, HTTPException, status
+from collections import defaultdict, deque
+import time
+from fastapi import APIRouter, Depends, HTTPException, status, Request
 from sqlalchemy.orm import Session
+from sqlalchemy import inspect, text
+import uuid
+from user_agents import parse as parse_ua
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 
-from routes.messaging import convert_message
-from constants import OWNER_USERNAME
-from dependencies import get_current_user, get_db
-from models import LoginRequest, RegisterRequest, User
-from utils import create_token, get_password_hash, verify_password
-from validation import is_valid_password, is_valid_username
+from backend.shared.constants import OWNER_USERNAME
+from backend.shared.dependencies import get_current_user, get_db
+from backend.shared.models import LoginRequest, RegisterRequest, ChangePasswordRequest, User, CryptoPublicKey, CryptoBackup
+from backend.shared.utils import create_token, get_password_hash, verify_password, get_client_ip
+from backend.shared.validation import is_valid_password, is_valid_username, is_valid_display_name
+import os
 
+from backend.security.audit import log_security
+from backend.security.profanity import contains_profanity
+from backend.security.rate_limit import rate_limit_per_ip
 router = APIRouter()
 
+_FAILED_ATTEMPT_WINDOW_SECONDS = 300
+_FAILED_ATTEMPT_THRESHOLD = 5
+_failed_login_attempts: dict[str, deque[float]] = defaultdict(deque)
+
+
+def _record_failed_login(identifier: str) -> bool:
+    now = time.time()
+    attempts = _failed_login_attempts[identifier]
+    attempts.append(now)
+
+    while attempts and now - attempts[0] > _FAILED_ATTEMPT_WINDOW_SECONDS:
+        attempts.popleft()
+
+    return len(attempts) >= _FAILED_ATTEMPT_THRESHOLD
+
+
+def _reset_failed_logins(identifier: str) -> None:
+    _failed_login_attempts.pop(identifier, None)
+
+def _is_admin(user: User) -> bool:
+    return user.id == 1
+
 def convert_user(user: User) -> dict:
     return {
         "id": user.id,
         "created_at": user.created_at.isoformat(),
         "last_seen": user.last_seen.isoformat(),
-        "online": user.online,
+        "online": user.is_online,
         "username": user.username,
-        "admin": user.username == OWNER_USERNAME
+        "display_name": user.display_name,
+        "profile_picture": user.avatar_url,
+        "bio": user.bio,
+        "admin": _is_admin(user),
+        "verified": user.verified,
+        "suspended": user.suspended,
+        "suspension_reason": user.suspension_reason,
+        "deleted": user.deleted
     }
 
 @router.get("/check_auth")
@@ -26,25 +64,83 @@ def check_auth(current_user: User = Depends(get_current_user)):
     return {
         "authenticated": True,
         "username": current_user.username,
-        "admin": current_user.username == OWNER_USERNAME
+        "admin": _is_admin(current_user)
     }
 
 
 @router.post("/login")
-def login(request: LoginRequest, db: Session = Depends(get_db)):
-    user = db.query(User).filter(User.username == request.username.strip()).first()
+@rate_limit_per_ip("5/minute")
+def login(request: Request, login_request: LoginRequest, db: Session = Depends(get_db)):
+    username = login_request.username.strip()
+    client_ip = get_client_ip(request)
+    raw_ua = request.headers.get("user-agent")
 
-    if not user or not verify_password(request.password.strip(), user.password_hash):
+    user = db.query(User).filter(User.username == username).first()
+
+    if not user or not verify_password(login_request.password.strip(), user.hashed_password):
+        log_security(
+            "login_failed",
+            severity="warning",
+            username=username,
+            ip=client_ip,
+            reason="invalid_credentials",
+        )
+        identifiers = [f"user:{username}"]
+        if client_ip:
+            identifiers.append(f"ip:{client_ip}")
+
+        suspicious = False
+        for identifier in identifiers:
+            if _record_failed_login(identifier):
+                suspicious = True
+
+        if suspicious:
+            total_failures = {
+                identifier: len(_failed_login_attempts.get(identifier, []))
+                for identifier in identifiers
+            }
+            log_security(
+                "auth_bruteforce_detected",
+                severity="warning",
+                username=username,
+                ip=client_ip,
+                failures=total_failures,
+                window_seconds=_FAILED_ATTEMPT_WINDOW_SECONDS,
+            )
         raise HTTPException(
             status_code=401,
             detail="Неверное имя пользователя или пароль"
         )
 
+    # Generate session ID for JWT (device session will be created on first device service access)
+    session_id = uuid.uuid4().hex
+
     user.online = True
     user.last_seen = datetime.now()
     db.commit()
 
-    token = create_token(user.id, user.username)
+    token = create_token(user.id, user.username, session_id)
+
+    identifiers = [f"user:{username}"]
+    if client_ip:
+        identifiers.append(f"ip:{client_ip}")
+    for identifier in identifiers:
+        _reset_failed_logins(identifier)
+
+    # Parse user agent for logging
+    ua = parse_ua(raw_ua or "")
+    device_type = "mobile" if ua.is_mobile else "tablet" if ua.is_tablet else "bot" if ua.is_bot else "desktop"
+
+    log_security(
+        "login_success",
+        username=user.username,
+        user_id=user.id,
+        ip=client_ip,
+        session_id=session_id,
+        device=device_type,
+        os=ua.os.family,
+        browser=ua.browser.family,
+    )
 
     return {
         "status": "success",
@@ -55,26 +151,39 @@ def login(request: LoginRequest, db: Session = Depends(get_db)):
 
 
 @router.post("/register")
-def register(request: RegisterRequest, db: Session = Depends(get_db)):
-    username = request.username.strip()
-    password = request.password.strip()
-    confirm_password = request.confirm_password.strip()
+@rate_limit_per_ip("3/hour")
+def register(request: Request, register_request: RegisterRequest, db: Session = Depends(get_db)):
+    username = register_request.username.strip()
+    display_name = register_request.display_name.strip()
+    password = register_request.password.strip()
+    confirm_password = register_request.confirm_password.strip()
+    client_ip = get_client_ip(request)
+    raw_ua = request.headers.get("user-agent")
 
     # Determine if owner already exists
     owner_exists = db.query(User).filter(User.username == OWNER_USERNAME).first() is not None
 
-    # If owner not yet registered, only allow the owner to register
-    if not owner_exists and username != OWNER_USERNAME:
-        raise HTTPException(
-            status_code=status.HTTP_403_FORBIDDEN,
-            detail="Регистрация временно закрыта до регистрации владельца"
-        )
-
     # Validate input
     if not is_valid_username(username):
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
-            detail="Имя пользователя должно быть от 3 до 20 символов и не содержать пробелов"
+            detail="Имя пользователя должно быть от 3 до 20 символов и содержать только английские буквы, цифры, дефисы и подчеркивания"
+        )
+    if contains_profanity(username):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Имя пользователя содержит запрещённые слова"
+        )
+
+    if not is_valid_display_name(display_name):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Отображаемое имя должно быть от 1 до 64 символов и не может быть пустым"
+        )
+    if contains_profanity(display_name):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Отображаемое имя содержит запрещённые слова"
         )
 
     if not is_valid_password(password):
@@ -89,13 +198,6 @@ def register(request: RegisterRequest, db: Session = Depends(get_db)):
             detail="Пароли не совпадают"
         )
 
-    # After owner exists, disallow registering the reserved owner username via public registration
-    if owner_exists and username == OWNER_USERNAME:
-        raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="Это имя пользователя зарезервировано"
-        )
-
     existing_user = db.query(User).filter(User.username == username).first()
     if existing_user:
         raise HTTPException(
@@ -104,22 +206,101 @@ def register(request: RegisterRequest, db: Session = Depends(get_db)):
         )
 
     hashed_password = get_password_hash(password)
+    
+    # Set verified=True for the owner (first user to register)
+    is_owner = not owner_exists and username == OWNER_USERNAME
+    
     new_user = User(
         username=username,
-        password_hash=hashed_password,
-        online=True,
-        last_seen=datetime.now()
+        display_name=display_name,
+        hashed_password=hashed_password,
+        salt="",  # Not used since bcrypt includes salt in hash
+        is_online=True,
+        last_seen=datetime.now(),
+        verified=is_owner
     )
 
     db.add(new_user)
     db.commit()
     db.refresh(new_user)
 
+    # Generate a temporary session ID for the token (device session will be created on first device service access)
+    session_id = uuid.uuid4().hex
+    token = create_token(new_user.id, new_user.username, session_id)
+
+    # Parse user agent for logging
+    raw_ua = request.headers.get("user-agent")
+    ua = parse_ua(raw_ua or "")
+    os_name = ua.os.family or "Unknown OS"
+    if ua.os.version_string:
+        os_name = f"{os_name} {ua.os.version_string}"
+    browser_name = ua.browser.family or "Unknown browser"
+    if ua.browser.version_string:
+        browser_name = f"{browser_name} {ua.browser.version_string}"
+    user_agent_summary = f"{os_name}, {browser_name}"
+
+    log_security(
+        "registration_success",
+        username=new_user.username,
+        display_name=new_user.display_name,
+        user_id=new_user.id,
+        ip=client_ip,
+        user_agent=user_agent_summary,
+        owner=is_owner,
+    )
+
     return {
         "status": "success",
-        "message": "Регистрация прошла успешно Теперь вы можете войти."
+        "message": "Регистрация прошла успешно",
+        "token": token,
+        "user": convert_user(new_user)
     }
 
+@router.get("/crypto/public-key")
+def get_public_key(current_user: User = Depends(get_current_user), db: Session = Depends(get_db)):
+    row = db.query(CryptoPublicKey).filter(CryptoPublicKey.user_id == current_user.id).first()
+    return {"publicKey": row.public_key_b64 if row else None}
+
+
+@router.post("/crypto/public-key")
+def set_public_key(payload: dict, current_user: User = Depends(get_current_user), db: Session = Depends(get_db)):
+    pk = payload.get("publicKey")
+    if not pk:
+        raise HTTPException(status_code=400, detail="publicKey required")
+    if not isinstance(pk, str) or len(pk) > 10000 or len(pk) < 10:
+        raise HTTPException(status_code=400, detail="Invalid publicKey format")
+    row = db.query(CryptoPublicKey).filter(CryptoPublicKey.user_id == current_user.id).first()
+    if row:
+        row.public_key_b64 = pk
+    else:
+        row = CryptoPublicKey(user_id=current_user.id, public_key_b64=pk)
+        db.add(row)
+    db.commit()
+    return {"status": "ok"}
+
+
+@router.get("/crypto/backup")
+def get_backup(current_user: User = Depends(get_current_user), db: Session = Depends(get_db)):
+    row = db.query(CryptoBackup).filter(CryptoBackup.user_id == current_user.id).first()
+    return {"blob": row.blob_json if row else None}
+
+
+@router.post("/crypto/backup")
+def set_backup(payload: dict, current_user: User = Depends(get_current_user), db: Session = Depends(get_db)):
+    blob = payload.get("blob")
+    if not blob:
+        raise HTTPException(status_code=400, detail="blob required")
+    if not isinstance(blob, str) or len(blob) > 1000000:  # 1MB limit
+        raise HTTPException(status_code=400, detail="Invalid blob format or size exceeds 1MB")
+    row = db.query(CryptoBackup).filter(CryptoBackup.user_id == current_user.id).first()
+    if row:
+        row.blob_json = blob
+    else:
+        row = CryptoBackup(user_id=current_user.id, blob_json=blob)
+        db.add(row)
+    db.commit()
+    return {"status": "ok"}
+
 
 @router.delete("/admin/user/{user_id}")
 def delete_user_as_owner(
@@ -128,7 +309,7 @@ def delete_user_as_owner(
     db: Session = Depends(get_db)
 ):
     # Only owner can delete users
-    if current_user.username != OWNER_USERNAME:
+    if _is_admin(current_user):
         raise HTTPException(status_code=403, detail="Only owner can perform this action")
 
     user = db.query(User).filter(User.id == user_id).first()
@@ -136,28 +317,223 @@ def delete_user_as_owner(
         raise HTTPException(status_code=404, detail="User not found")
 
     # Prevent deleting the owner account via API
-    if user.username == OWNER_USERNAME:
+    if _is_admin(user):
         raise HTTPException(status_code=400, detail="Cannot delete owner account")
 
     # Manually delete user's messages to satisfy FK constraints
-    from models import Message  # local import to avoid circular
+    from backend.shared.models import Message  # local import to avoid circular
     db.query(Message).filter(Message.user_id == user.id).delete()
 
     db.delete(user)
     db.commit()
 
+    log_security(
+        "admin_delete_user",
+        severity="warning",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        target_username=user.username,
+        target_id=user.id,
+    )
+
     return {"status": "success", "deleted_user_id": user_id}
 
 @router.get("/logout")
 def logout(
+    http: Request,
+    credentials: HTTPAuthorizationCredentials = Depends(HTTPBearer()),
     current_user: User = Depends(get_current_user),
     db: Session = Depends(get_db)
 ):
+    # Revoke current session - TODO: Move to device service
+    # from backend.shared.utils import verify_token as _verify_token
+    # payload = _verify_token(credentials.credentials)
+    # if payload and payload.get("session_id"):
+    #     db.query(DeviceSession).filter(
+    #         DeviceSession.user_id == current_user.id,
+    #         DeviceSession.session_id == payload["session_id"],
+    #     ).update({DeviceSession.revoked: True})
+
     current_user.online = False
     current_user.last_seen = datetime.now()
     db.commit()
 
+    client_ip = get_client_ip(http)
+    log_security(
+        "logout",
+        username=current_user.username,
+        user_id=current_user.id,
+        ip=client_ip,
+        session_id=None,  # TODO: Get session_id from device service
+    )
+
     return {
         "status": "success",
         "message": "Logged out successfully"
     }
+
+
+@router.post("/change-password")
+@rate_limit_per_ip("5/hour")
+def change_password(
+    request: Request,
+    password_request: ChangePasswordRequest,
+    credentials: HTTPAuthorizationCredentials = Depends(HTTPBearer()),
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    # Verify current derived password against stored hash
+    if not verify_password(password_request.currentPasswordDerived.strip(), current_user.hashed_password):
+        raise HTTPException(status_code=401, detail="Текущий пароль неверный")
+
+    # Update password hash to hash of new derived password
+    current_user.hashed_password = get_password_hash(password_request.newPasswordDerived.strip())
+    db.commit()
+
+    # Optionally revoke all other sessions, keeping the current one - TODO: Move to device service
+    # if password_request.logoutAllExceptCurrent:
+    #     from backend.shared.utils import verify_token as _verify_token
+    #     payload = _verify_token(credentials.credentials)
+    #     if not payload:
+    #             raise HTTPException(status_code=401, detail="Invalid token")
+    #     current_session_id = payload.get("session_id")
+    #     db.query(DeviceSession).filter(
+    #         DeviceSession.user_id == current_user.id,
+    #         DeviceSession.session_id != current_session_id,
+    #     ).update({DeviceSession.revoked: True})
+    #     db.commit()
+
+    client_ip = get_client_ip(request)
+    log_security(
+        "password_changed",
+        username=current_user.username,
+        user_id=current_user.id,
+        ip=client_ip,
+        logout_others=bool(password_request.logoutAllExceptCurrent),
+    )
+
+    return {"status": "success"}
+
+
+@router.get("/users")
+@rate_limit_per_ip("30/minute")  # Per-IP limit to prevent abuse
+def list_users(request: Request, current_user: User = Depends(get_current_user), db: Session = Depends(get_db)):
+    users = db.query(User).order_by(User.username.asc()).all()
+    return {
+        "users": [
+            convert_user(u) for u in users if u.id != current_user.id
+        ]
+    }
+
+
+@router.get("/crypto/public-key/of/{user_id}")
+@rate_limit_per_ip("100/minute")  # Per-IP limit to prevent abuse
+def get_public_key_of(request: Request, user_id: int, current_user: User = Depends(get_current_user), db: Session = Depends(get_db)):
+    row = db.query(CryptoPublicKey).filter(CryptoPublicKey.user_id == user_id).first()
+    return {"publicKey": row.public_key_b64 if row else None}
+
+
+@router.get("/users/search")
+@rate_limit_per_ip("60/minute")  # Per-IP limit to prevent abuse
+def search_users(request: Request, q: str, current_user: User = Depends(get_current_user), db: Session = Depends(get_db)):
+    if len(q.strip()) < 2:
+        return {"users": []}
+    
+    # Case-insensitive partial match on username
+    users = db.query(User).filter(
+        User.username.ilike(f"%{q.strip()}%"),
+        User.id != current_user.id  # Exclude current user
+    ).order_by(User.username.asc()).limit(20).all()
+    
+    return {
+        "users": [convert_user(u) for u in users]
+    }
+
+
+async def _delete_user_data(user: User, db: Session):
+    """
+    Helper function to delete user data - marks user as deleted, clears sensitive data,
+    deletes profile picture, removes non-whitelist user data, and sends WebSocket message.
+    """
+    user_id = user.id
+    
+    # Mark user as deleted and clear sensitive data
+    user.deleted = True
+    user.display_name = f"Deleted User #{user_id}"
+    user.bio = None
+    user.hashed_password = ""
+    user.username = f"deleted_{user_id}"
+    user.profile_picture = None
+    user.last_seen = None  # Clear last seen timestamp
+    user.created_at = None  # Clear member since timestamp
+    
+    # Delete profile picture file if exists
+    if user.profile_picture and user.profile_picture.startswith("/api/profile-picture/"):
+        try:
+            filename = user.profile_picture.split("/")[-1]
+            filepath = os.path.join("data/uploads/pfp", filename)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        except Exception as e:
+            # Log error but don't fail the request
+            pass
+    
+    # Dynamic deletion of all non-whitelist data
+    WHITELIST_TABLES = {"message", "dm_envelope", "reaction", "dm_reaction", "message_file", "dm_file"}
+    
+    try:
+        inspector = inspect(db.bind)
+        all_tables = inspector.get_table_names()
+        
+        for table_name in all_tables:
+            if table_name in WHITELIST_TABLES or table_name == "user":
+                continue
+            
+            # Check if table has user_id column
+            columns = inspector.get_columns(table_name)
+            has_user_id = any(col['name'] == 'user_id' for col in columns)
+            
+            if has_user_id:
+                # Delete all records for this user
+                db.execute(text(f"DELETE FROM {table_name} WHERE user_id = :uid"), {"uid": user_id})
+        
+        db.commit()
+    except Exception as e:
+        # Log error and rollback
+        db.rollback()
+        raise HTTPException(status_code=500, detail="Failed to delete user data")
+    
+    # Send WebSocket deletion message
+    try:
+        from .messaging import messagingManager
+        await messagingManager.send_deletion_to_user(user_id)
+    except Exception as e:
+        # Log error but don't fail the request
+        pass
+
+
+@router.post("/delete")
+async def delete_account(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Delete the current user's own account - preserves messages/DMs/reactions/files
+    """
+    # Prevent admin/owner account self-deletion
+    if _is_admin(current_user):
+        raise HTTPException(status_code=400, detail="Cannot delete admin/owner account")
+    
+    await _delete_user_data(current_user, db)
+    
+    log_security(
+        "self_delete_account",
+        severity="warning",
+        user_id=current_user.id,
+        username=current_user.username,
+    )
+
+    return {
+        "status": "success",
+        "message": "Account deleted successfully"
+    }

backend/routes/devices.py

@@ -0,0 +1,92 @@
+from datetime import datetime
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from backend.shared.dependencies import get_current_user, get_db
+from backend.shared.models import User, DeviceSession
+from backend.shared.utils import verify_token
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+
+router = APIRouter()
+security = HTTPBearer()
+
+
+def _get_current_session_id(credentials: HTTPAuthorizationCredentials) -> str:
+    token = credentials.credentials
+    payload = verify_token(token)
+    if not payload or "session_id" not in payload:
+        raise HTTPException(status_code=401, detail="Invalid session")
+    return payload["session_id"]
+
+
+@router.get("")
+def list_devices(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    current_session_id = _get_current_session_id(credentials)
+    sessions = (
+        db.query(DeviceSession)
+        .filter(DeviceSession.user_id == current_user.id, DeviceSession.revoked == False)
+        .order_by(DeviceSession.last_seen.desc())
+        .all()
+    )
+    return {
+        "devices": [
+            {
+                "session_id": s.session_id,
+                "device_type": s.device_type,
+                "device_name": s.device_name,
+                "os_name": s.os_name,
+                "os_version": s.os_version,
+                "browser_name": s.browser_name,
+                "browser_version": s.browser_version,
+                "brand": s.brand,
+                "model": s.model,
+                "created_at": s.created_at.isoformat() if s.created_at else None,
+                "last_seen": s.last_seen.isoformat() if s.last_seen else None,
+                "revoked": s.revoked,
+                "current": s.session_id == current_session_id,
+            }
+            for s in sessions
+        ]
+    }
+
+
+@router.delete("/{session_id}")
+def revoke_device(
+    session_id: str,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    if not session_id or len(session_id) > 64 or len(session_id) < 1:
+        raise HTTPException(status_code=400, detail="Invalid session ID")
+    
+    s = (
+        db.query(DeviceSession)
+        .filter(DeviceSession.user_id == current_user.id, DeviceSession.session_id == session_id)
+        .first()
+    )
+    if not s:
+        raise HTTPException(status_code=404, detail="Device session not found")
+    s.revoked = True
+    db.commit()
+    return {"status": "success"}
+
+
+@router.post("/logout-all")
+def logout_all_except_current(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    current_session_id = _get_current_session_id(credentials)
+    db.query(DeviceSession).filter(
+        DeviceSession.user_id == current_user.id,
+        DeviceSession.session_id != current_session_id,
+    ).update({DeviceSession.revoked: True})
+    db.commit()
+    return {"status": "success"}
+
+

backend/routes/moderation.py

@@ -0,0 +1,114 @@
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel, Field
+from typing import List
+
+from backend.shared.constants import OWNER_USERNAME
+from backend.shared.dependencies import get_current_user
+from backend.shared.models import User
+from backend.security.audit import log_security
+from backend.security.profanity import add_to_blocklist, get_blocklist, remove_from_blocklist
+from backend.security.rate_limit import reset_rate_limit_for_ip, clear_all_rate_limits
+
+
+class BlocklistUpdateRequest(BaseModel):
+    words: List[str] = Field(default_factory=list, min_items=1)
+
+
+class UnblockIPRequest(BaseModel):
+    ip: str = Field(..., min_length=1)
+
+
+router = APIRouter(prefix="/moderation", tags=["moderation"])
+
+
+def _ensure_owner(user: User) -> None:
+    if user.username != OWNER_USERNAME:
+        raise HTTPException(status_code=403, detail="Only owner can perform this action")
+
+
+@router.get("/blocklist")
+def list_blocklist(current_user: User = Depends(get_current_user)):
+    _ensure_owner(current_user)
+    return {"words": get_blocklist()}
+
+
+@router.post("/blocklist")
+def append_blocklist(
+    request: BlocklistUpdateRequest,
+    current_user: User = Depends(get_current_user)
+):
+    _ensure_owner(current_user)
+    added, updated = add_to_blocklist(request.words)
+    log_security(
+        "blocklist_add",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        added=added,
+    )
+    return {"added": added, "words": updated}
+
+
+@router.delete("/blocklist")
+def delete_from_blocklist(
+    request: BlocklistUpdateRequest,
+    current_user: User = Depends(get_current_user)
+):
+    _ensure_owner(current_user)
+    removed, updated = remove_from_blocklist(request.words)
+    log_security(
+        "blocklist_remove",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        removed=removed,
+    )
+    return {"removed": removed, "words": updated}
+
+
+@router.post("/unblock-ip")
+def unblock_ip(
+    request: UnblockIPRequest,
+    current_user: User = Depends(get_current_user)
+):
+    """Unblock an IP address from rate limiting."""
+    _ensure_owner(current_user)
+    ip = request.ip.strip()
+    
+    if not ip:
+        raise HTTPException(status_code=400, detail="IP address is required")
+    
+    cleared = reset_rate_limit_for_ip(ip)
+    
+    log_security(
+        "rate_limit_unblock",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        ip=ip,
+        success=cleared,
+    )
+    
+    if cleared:
+        return {"status": "success", "message": f"Rate limit cleared for IP: {ip}"}
+    else:
+        return {"status": "success", "message": f"No rate limit entries found for IP: {ip}"}
+
+
+@router.post("/clear-all-rate-limits")
+def clear_all_rate_limits_endpoint(
+    current_user: User = Depends(get_current_user)
+):
+    """Clear all rate limit entries. Use with caution."""
+    _ensure_owner(current_user)
+    
+    cleared = clear_all_rate_limits()
+    
+    log_security(
+        "rate_limit_clear_all",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        entries_cleared=cleared,
+    )
+    
+    return {"status": "success", "message": f"Cleared {cleared} rate limit entries"}
+
+
+

backend/routes/profile.py

@@ -1,23 +1,50 @@
 from pathlib import Path
+import re
 from fastapi import APIRouter, Depends, HTTPException, UploadFile, File
+from fastapi.responses import FileResponse
 from sqlalchemy.orm import Session
 from PIL import Image
 import os
 import uuid
 import io
+from fastapi import Request
 
-from dependencies import get_db, get_current_user
-from models import User, UpdateBioRequest, UserProfileResponse
+from backend.shared.dependencies import get_db, get_current_user
+from backend.shared.models import User, UpdateBioRequest, UserProfileResponse
+from pydantic import BaseModel
+from backend.shared.validation import is_valid_username, is_valid_display_name
+from backend.shared.similarity import is_user_similar_to_verified
+import os
+import httpx
+from backend.security.audit import log_security
+from backend.security.profanity import contains_profanity
+from backend.security.rate_limit import rate_limit_per_ip
 
 router = APIRouter()
 
+
+def _ensure_owner_unsuspended(user: User | None, db: Session):
+    if user and user.id == 1 and user.suspended:
+        user.suspended = False
+        user.suspension_reason = None
+        db.commit()
+        db.refresh(user)
+
+# Request models
+class UpdateProfileRequest(BaseModel):
+    username: str | None = None
+    display_name: str | None = None
+    description: str | None = None
+
 # Create uploads directory if it doesn't exist
-PROFILE_PICTURES_DIR = Path("data/uploads/pfp")
+PROFILE_PICTURES_DIR = Path(__file__).resolve().parent.parent / "data" / "uploads" / "pfp"
 
 os.makedirs(PROFILE_PICTURES_DIR, exist_ok=True)
 
 @router.post("/upload-profile-picture")
+@rate_limit_per_ip("10/minute")
 async def upload_profile_picture(
+    request: Request,
     profile_picture: UploadFile = File(...),
     current_user: User = Depends(get_current_user),
     db: Session = Depends(get_db)
@@ -72,12 +99,15 @@ async def get_profile_picture(filename: str):
     """
     Serve profile picture files
     """
+
+    if not re.match(r"^\d+_[0-9a-z]+\.jpg$", filename):
+        raise HTTPException(status_code=400, detail="Invalid file name")
+
     filepath = os.path.join(PROFILE_PICTURES_DIR, filename)
     
     if not os.path.exists(filepath):
         raise HTTPException(status_code=404, detail="Profile picture not found")
     
-    from fastapi.responses import FileResponse
     return FileResponse(filepath, media_type="image/jpeg")
 
 @router.get("/user/profile")
@@ -88,30 +118,148 @@ async def get_user_profile(
     """
     Get current user's profile information
     """
+    _ensure_owner_unsuspended(current_user, db)
+
+    return UserProfileResponse(
+        id=current_user.id,
+        username=current_user.username,
+        display_name=current_user.display_name,
+        profile_picture=current_user.profile_picture,
+        bio=current_user.bio,
+        online=current_user.online,
+        last_seen=current_user.last_seen,
+        created_at=current_user.created_at,
+        verified=current_user.verified,
+        suspended=current_user.suspended or False,
+        suspension_reason=current_user.suspension_reason,
+        deleted=(current_user.deleted or current_user.suspended) or False,  # Treat suspended as deleted
+    )
+
+
+@router.get("/user/list")
+async def list_users(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    if current_user.id != 1:
+        raise HTTPException(status_code=403, detail="Only admin can list users")
+
+    _ensure_owner_unsuspended(current_user, db)
+
+    users = db.query(User).order_by(User.username.asc()).all()
     return {
-        "id": current_user.id,
+        "users": [
+            UserProfileResponse(
+                id=user.id,
+                username=user.username,
+                display_name=user.display_name,
+                profile_picture=user.profile_picture,
+                bio=user.bio,
+                online=user.online,
+                last_seen=user.last_seen,
+                created_at=user.created_at,
+                verified=user.verified,
+                suspended=user.suspended or False,
+                suspension_reason=user.suspension_reason,
+                deleted=(user.deleted or user.suspended) or False,  # Treat suspended as deleted
+            ).model_dump()
+            for user in users
+        ]
+    }
+
+@router.put("/user/profile")
+@rate_limit_per_ip("10/minute")
+async def update_user_profile(
+    request: Request,
+    update_request: UpdateProfileRequest,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Update current user's profile information
+    """
+    updated = False
+    
+    # Update username if provided
+    if update_request.username is not None:
+        username = update_request.username.strip()
+        if not is_valid_username(username):
+            raise HTTPException(
+                status_code=400, 
+                detail="Имя пользователя должно быть от 3 до 20 символов и содержать только английские буквы, цифры, дефисы и подчеркивания"
+            )
+        if contains_profanity(username):
+            raise HTTPException(
+                status_code=400,
+                detail="Имя пользователя содержит запрещённые слова"
+            )
+        
+        # Check if username is already taken by another user
+        existing_user = db.query(User).filter(User.username == username, User.id != current_user.id).first()
+        if existing_user:
+            raise HTTPException(status_code=400, detail="Это имя пользователя уже занято")
+        
+        current_user.username = username
+        updated = True
+    
+    # Update display name if provided
+    if update_request.display_name is not None:
+        display_name = update_request.display_name.strip()
+        if not is_valid_display_name(display_name):
+            raise HTTPException(
+                status_code=400, 
+                detail="Отображаемое имя должно быть от 1 до 64 символов и не может быть пустым"
+            )
+        if contains_profanity(display_name):
+            raise HTTPException(
+                status_code=400,
+                detail="Отображаемое имя содержит запрещённые слова"
+            )
+        
+        current_user.display_name = display_name
+        updated = True
+    
+    # Update bio if provided
+    if update_request.description is not None:
+        bio = update_request.description.strip()
+        if len(bio) > 500:
+            raise HTTPException(status_code=400, detail="Bio must be 500 characters or less")
+        
+        current_user.bio = bio
+        updated = True
+    
+    if updated:
+        db.commit()
+        return {
+            "message": "Profile updated successfully",
             "username": current_user.username,
-        "profile_picture": current_user.profile_picture,
-        "bio": current_user.bio,
-        "online": current_user.online,
-        "last_seen": current_user.last_seen,
-        "created_at": current_user.created_at
+            "display_name": current_user.display_name,
+            "bio": current_user.bio
+        }
+    else:
+        return {
+            "message": "No changes made",
+            "username": current_user.username,
+            "display_name": current_user.display_name,
+            "bio": current_user.bio
         }
 
 
 @router.put("/user/bio")
+@rate_limit_per_ip("10/minute")
 async def update_user_bio(
-    request: UpdateBioRequest,
+    request: Request,
+    bio_request: UpdateBioRequest,
     current_user: User = Depends(get_current_user),
     db: Session = Depends(get_db)
 ):
     """
     Update current user's bio
     """
-    if len(request.bio) > 500:  # Limit bio to 500 characters
+    if len(bio_request.bio) > 500:  # Limit bio to 500 characters
         raise HTTPException(status_code=400, detail="Bio must be 500 characters or less")
     
-    current_user.bio = request.bio.strip()
+    current_user.bio = bio_request.bio.strip()
     db.commit()
     
     return {
@@ -128,17 +276,305 @@ async def get_user_by_username(
     """
     Get user profile by username
     """
+    if not username or not is_valid_username(username):
+        raise HTTPException(status_code=400, detail="Invalid username format")
+    
     user = db.query(User).filter(User.username == username).first()
     
     if not user:
         raise HTTPException(status_code=404, detail="User not found")
 
+    _ensure_owner_unsuspended(user, db)
+    
+    # Handle deleted or suspended users
+    if user.deleted or user.suspended:
+        return UserProfileResponse(
+            id=user.id,
+            username="deleted",
+            display_name="Deleted User",
+            profile_picture=None,
+            bio=None,
+            online=False,
+            last_seen=None,  # Clear last seen timestamp
+            created_at=None,  # Clear member since timestamp
+            verified=False,
+            suspended=False,
+            suspension_reason=None,
+            deleted=True
+        )
+    
     return UserProfileResponse(
         id=user.id,
         username=user.username,
+        display_name=user.display_name,
         profile_picture=user.profile_picture,
         bio=user.bio,
         online=user.online,
         last_seen=user.last_seen,
-        created_at=user.created_at
+        created_at=user.created_at,
+        verified=user.verified,
+        suspended=user.suspended or False,
+        suspension_reason=user.suspension_reason,
+        deleted=(user.deleted or user.suspended) or False,  # Treat suspended as deleted
     )
+
+@router.get("/user/id/{user_id}")
+async def get_user_by_id(
+    user_id: int,
+    db: Session = Depends(get_db)
+):
+    """
+    Get user profile by user ID
+    """
+    if user_id <= 0:
+        raise HTTPException(status_code=400, detail="Invalid user ID")
+    
+    user = db.query(User).filter(User.id == user_id).first()
+    
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+
+    _ensure_owner_unsuspended(user, db)
+    
+    # Handle deleted or suspended users
+    if user.deleted or user.suspended:
+        return UserProfileResponse(
+            id=user.id,
+            username="deleted",
+            display_name="Deleted User",
+            profile_picture=None,
+            bio=None,
+            online=False,
+            last_seen=None,  # Clear last seen timestamp
+            created_at=None,  # Clear member since timestamp
+            verified=False,
+            suspended=False,
+            suspension_reason=None,
+            deleted=True
+        )
+    
+    return UserProfileResponse(
+        id=user.id,
+        username=user.username,
+        display_name=user.display_name,
+        profile_picture=user.profile_picture,
+        bio=user.bio,
+        online=user.online,
+        last_seen=user.last_seen,
+        created_at=user.created_at,
+        verified=user.verified,
+        suspended=user.suspended or False,
+        suspension_reason=user.suspension_reason,
+        deleted=user.deleted or False
+    )
+
+
+@router.post("/user/{user_id}/verify")
+async def verify_user(
+    user_id: int,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Toggle verification status for a user (owner only)
+    """
+    # Only user with ID 1 (owner) can verify users
+    if current_user.id != 1:
+        raise HTTPException(status_code=403, detail="Only owner can verify users")
+    
+    target_user = db.query(User).filter(User.id == user_id).first()
+    if not target_user:
+        raise HTTPException(status_code=404, detail="User not found")
+    
+    # Toggle verification status
+    target_user.verified = not target_user.verified
+    db.commit()
+    
+    log_security(
+        "admin_verify_toggle",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        target_username=target_user.username,
+        target_id=target_user.id,
+        verified=target_user.verified,
+    )
+
+    return {
+        "verified": target_user.verified,
+        "message": f"User verification {'enabled' if target_user.verified else 'disabled'}"
+    }
+
+
+@router.get("/user/check-similarity/{user_id}")
+async def check_user_similarity(
+    user_id: int,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Check if a user is similar to any verified user
+    """
+    target_user = db.query(User).filter(User.id == user_id).first()
+    if not target_user:
+        raise HTTPException(status_code=404, detail="User not found")
+    
+    # Get all verified users
+    verified_users = db.query(User).filter(User.verified == True).all()
+    verified_users_data = [
+        {"username": user.username, "display_name": user.display_name}
+        for user in verified_users
+    ]
+    
+    # Check similarity
+    is_similar, similar_to = is_user_similar_to_verified(
+        target_user.username,
+        target_user.display_name,
+        verified_users_data
+    )
+    
+    return {
+        "isSimilar": is_similar,
+        "similarTo": similar_to if is_similar else None
+    }
+
+
+# Admin endpoints for user management
+class SuspendUserRequest(BaseModel):
+    reason: str
+
+@router.post("/user/{user_id}/suspend")
+async def suspend_user(
+    user_id: int,
+    request: SuspendUserRequest,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Suspend a user account (admin only)
+    """
+    # Only user with ID 1 (admin) can suspend users
+    if current_user.id != 1:
+        raise HTTPException(status_code=403, detail="Only admin can suspend users")
+    
+    target_user = db.query(User).filter(User.id == user_id).first()
+    if not target_user:
+        raise HTTPException(status_code=404, detail="User not found")
+    
+    # Cannot suspend admin
+    if target_user.id == 1:
+        raise HTTPException(status_code=400, detail="Cannot suspend admin account")
+    
+    # Suspend the user
+    target_user.suspended = True
+    target_user.suspension_reason = request.reason
+    db.commit()
+    
+    log_security(
+        "admin_suspend_user",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        target_username=target_user.username,
+        target_id=target_user.id,
+        reason=request.reason,
+    )
+
+    # Send WebSocket suspension message
+    try:
+        messaging_service_url = os.getenv("MESSAGING_SERVICE_URL", "http://messaging_service:8305")
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            response = await client.post(
+                f"{messaging_service_url}/messaging/send-suspension",
+                json={
+                    "user_id": user_id,
+                    "reason": request.reason
+                }
+            )
+            response.raise_for_status()
+    except Exception as e:
+        # Log error but don't fail the request
+        pass
+    
+    return {
+        "status": "success",
+        "message": f"User {target_user.username} has been suspended",
+        "reason": request.reason
+    }
+
+
+@router.post("/user/{user_id}/unsuspend")
+async def unsuspend_user(
+    user_id: int,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Unsuspend a user account (admin only)
+    """
+    # Only user with ID 1 (admin) can unsuspend users
+    if current_user.id != 1:
+        raise HTTPException(status_code=403, detail="Only admin can unsuspend users")
+    
+    target_user = db.query(User).filter(User.id == user_id).first()
+    if not target_user:
+        raise HTTPException(status_code=404, detail="User not found")
+    
+    # Unsuspend the user
+    target_user.suspended = False
+    target_user.suspension_reason = None
+    db.commit()
+    
+    log_security(
+        "admin_unsuspend_user",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        target_username=target_user.username,
+        target_id=target_user.id,
+    )
+
+    return {
+        "status": "success",
+        "message": f"User {target_user.username} has been unsuspended"
+    }
+
+
+@router.post("/user/{user_id}/delete")
+async def delete_user(
+    user_id: int,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Delete a user account (admin only) - preserves messages/DMs/reactions/files
+    """
+    # Only user with ID 1 (admin) can delete users
+    if current_user.id != 1:
+        raise HTTPException(status_code=403, detail="Only admin can delete users")
+    
+    target_user = db.query(User).filter(User.id == user_id).first()
+    if not target_user:
+        raise HTTPException(status_code=404, detail="User not found")
+    
+    # Cannot delete admin
+    if target_user.id == 1:
+        raise HTTPException(status_code=400, detail="Cannot delete admin account")
+    
+    snapshot_username = target_user.username
+    snapshot_display_name = target_user.display_name
+
+    from .account import _delete_user_data
+    await _delete_user_data(target_user, db)
+    
+    log_security(
+        "admin_delete_user",
+        severity="warning",
+        actor=current_user.username,
+        actor_id=current_user.id,
+        target_username=snapshot_username,
+        target_display_name=snapshot_display_name,
+        target_id=target_user.id,
+    )
+
+    return {
+        "status": "success",
+        "message": f"User {target_user.username} has been deleted"
+    }

backend/routes/push.py

@@ -0,0 +1,69 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+from pydantic import BaseModel
+from backend.shared.dependencies import get_current_user, get_db
+from backend.shared.models import User, PushSubscriptionRequest
+from backend.services.push.files import push_service
+
+router = APIRouter()
+
+class SendPublicNotificationRequest(BaseModel):
+    message_id: int
+    exclude_user_id: int
+
+@router.post("/subscribe")
+async def subscribe_to_push_notifications(
+    request: PushSubscriptionRequest,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Subscribe user to push notifications"""
+    try:
+        success = await push_service.subscribe_user(
+            db=db,
+            user_id=current_user.id,
+            endpoint=request.endpoint,
+            p256dh_key=request.keys["p256dh"],
+            auth_key=request.keys["auth"]
+        )
+        
+        if success:
+            return {"status": "success", "message": "Push notifications enabled"}
+        else:
+            raise HTTPException(status_code=500, detail="Failed to enable push notifications")
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+@router.delete("/unsubscribe")
+async def unsubscribe_from_push_notifications(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Unsubscribe user from push notifications"""
+    try:
+        success = await push_service.unsubscribe_user(db=db, user_id=current_user.id)
+
+        if success:
+            return {"status": "success", "message": "Push notifications disabled"}
+        else:
+            raise HTTPException(status_code=500, detail="Failed to disable push notifications")
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+@router.post("/send-public-notification")
+async def send_public_message_notification(
+    request: SendPublicNotificationRequest,
+    db: Session = Depends(get_db)
+):
+    """Send push notification for public message (called by messaging service)"""
+    try:
+        # Get the message from database
+        from backend.shared.models import Message
+        message = db.query(Message).filter(Message.id == request.message_id).first()
+        if not message:
+            raise HTTPException(status_code=404, detail="Message not found")
+
+        await push_service.send_public_message_notification(db, message, exclude_user_id=request.exclude_user_id)
+        return {"status": "success"}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))

backend/routes/webrtc.py

@@ -0,0 +1,89 @@
+import logging
+import os
+import hmac
+import hashlib
+import time
+from fastapi import APIRouter, Depends
+from backend.shared.dependencies import get_current_user
+import traceback
+
+router = APIRouter()
+logger = logging.getLogger("uvicorn.error")
+
+
+def generate_turn_credentials(username: str, secret: str, expiration_minutes: int = 60):
+    """Generate time-limited TURN credentials using TURN REST API format.
+    
+    This creates temporary credentials that expire after the specified time.
+    The username format is: timestamp:username
+    The password is an HMAC hash of the username and secret.
+    """
+    # Current timestamp (seconds since epoch)
+    timestamp = int(time.time()) + (expiration_minutes * 60)
+    
+    # Create temporary username: timestamp:original_username
+    temp_username = f"{timestamp}:{username}"
+    
+    # Generate password using HMAC-SHA1
+    temp_password = hmac.new(
+        secret.encode('utf-8'),
+        temp_username.encode('utf-8'),
+        hashlib.sha1
+    ).hexdigest()
+    
+    return temp_username, temp_password
+
+
+@router.get("/ice")
+async def get_ice_servers(current_user = Depends(get_current_user)):
+    """Return ICE server configuration (STUN/TURN) for WebRTC clients.
+    
+    Generates time-limited TURN credentials that expire in 1 hour.
+    """
+    try:
+        # Prefer using your own coturn for both STUN and TURN
+        turn_domain = "fromchat.ru"
+        stun_urls = [
+            f"stun:{turn_domain}:3478",
+            f"stuns:{turn_domain}:5349",
+        ]
+        
+        turn_urls = [
+            f"turn:{turn_domain}:3478",
+            f"turns:{turn_domain}:5349",
+        ]
+
+        # Get TURN configuration from environment
+        turn_username = os.getenv("TURN_USERNAME")
+        turn_secret = os.getenv("TURN_SECRET")
+
+        # Check if required environment variables are set
+        if not turn_username:
+            logger.error("ERROR: TURN_USERNAME environment variable is not set")
+            raise ValueError("TURN_USERNAME environment variable is not set")
+        
+        if not turn_secret:
+            logger.error("ERROR: TURN_SECRET environment variable is not set")
+            raise ValueError("TURN_SECRET environment variable is not set")
+
+        ice_servers: list[dict] = [{"urls": url} for url in stun_urls]
+
+        temp_username, temp_password = generate_turn_credentials(
+            turn_username, 
+            turn_secret, 
+            expiration_minutes=60  # Expires in 1 hour
+        )
+        
+        ice_servers.append({
+            "urls": turn_urls,
+            "username": temp_username,
+            "credential": temp_password,
+        })
+
+        return {"iceServers": ice_servers}
+        
+    except Exception as e:
+        logger.error(f"ERROR in /api/webrtc/ice: {str(e)}")
+        logger.error(f"ERROR type: {type(e).__name__}")
+        traceback.print_exc()
+        raise

backend/run_local.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+"""
+Local development server that runs all services in a single FastAPI application.
+This provides the same monolithic experience as before, but with microservice separation.
+"""
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+import uvicorn
+import os
+
+# Import service routers
+from backend.routes.account import router as account_router
+from backend.routes.profile import router as profile_router
+from backend.routes.devices import router as device_router
+from backend.routes.messaging import router as messaging_router
+from backend.routes.push import router as push_router
+from backend.routes.webrtc import router as webrtc_router
+from backend.routes.moderation import router as moderation_router
+
+# Import security modules
+from security.audit import log_access
+from security.rate_limit import limiter
+from slowapi.middleware import SlowAPIMiddleware
+
+# Create main FastAPI app
+app = FastAPI(title="FromChat Local Development")
+
+# Add rate limiting middleware
+app.state.limiter = limiter
+app.add_middleware(SlowAPIMiddleware)
+
+# CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=[
+        "https://fromchat.ru",
+        "https://beta.fromchat.ru",
+        "https://www.fromchat.ru",
+        "http://127.0.0.1:8301",
+        "http://127.0.0.1:8300",
+        "http://localhost:8301",
+        "http://localhost:8300",
+    ],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Mount service routers with appropriate prefixes
+app.include_router(account_router, prefix="/account")
+app.include_router(profile_router, prefix="/profile")
+app.include_router(device_router, prefix="/devices")
+app.include_router(messaging_router, prefix="/messaging")
+app.include_router(push_router, prefix="/push")
+app.include_router(webrtc_router, prefix="/webrtc")
+app.include_router(moderation_router, prefix="/moderation")
+
+if __name__ == "__main__":
+    # Run the server
+    port = int(os.getenv("PORT", "8301"))
+    host = os.getenv("HOST", "127.0.0.1")
+
+    print(f"Starting FromChat local development server on {host}:{port}")
+    print("Available services:")
+    print("  - Account: http://127.0.0.1:8301/account/")
+    print("  - Profile: http://127.0.0.1:8301/profile/")
+    print("  - Devices: http://127.0.0.1:8301/devices/")
+    print("  - Messaging: http://127.0.0.1:8301/messaging/")
+    print("  - Push: http://127.0.0.1:8301/push/")
+    print("  - WebRTC: http://127.0.0.1:8301/webrtc/")
+    print("  - Moderation: http://127.0.0.1:8301/moderation/")
+
+    uvicorn.run(
+        "run_local:app",
+        host=host,
+        port=port,
+        reload=True,
+        reload_dirs=["backend"]
+    )

backend/security/__init__.py

@@ -0,0 +1,2 @@
+# Package marker for security utilities
+

backend/security/audit.py

@@ -0,0 +1,406 @@
+from __future__ import annotations
+
+import logging
+from html import unescape
+from typing import Any, Callable, Dict, List
+
+from backend.logging_config import access_logger, dm_logger, public_chat_logger, security_logger
+
+
+def _clean_username(username: Any) -> str:
+    if not username:
+        return "unknown user"
+    return f"@{username}"
+
+
+def _format_user(fields: Dict[str, Any], username_key: str = "username", user_id_key: str = "user_id") -> str:
+    username = fields.get(username_key)
+    if username is None and "_" in username_key:
+        base_key = username_key.split("_", 1)[0]
+        username = fields.get(base_key)
+
+    user_id = fields.get(user_id_key)
+    if user_id is None and "_" in user_id_key:
+        base_key = user_id_key.split("_", 1)[0]
+        user_id = fields.get(base_key)
+
+    if username and user_id is not None:
+        return f"{_clean_username(username)} (user id {user_id})"
+    if username:
+        return _clean_username(username)
+    if user_id is not None:
+        return f"user id {user_id}"
+    return "unknown user"
+
+
+def _format_actor(fields: Dict[str, Any], prefix: str) -> str:
+    return _format_user(fields, f"{prefix}_username", f"{prefix}_id")
+
+
+def _plural(label: str, count: int) -> str:
+    return f"{count} {label if count == 1 else label + 's'}"
+
+
+def _yes_no(flag: Any) -> str:
+    return "yes" if flag else "no"
+
+
+def _render_security(action: str, fields: Dict[str, Any]) -> List[str]:
+    if action == "login_success":
+        lines = [f"Login approved for {_format_user(fields)}"]
+        session = fields.get("session_id")
+        if session:
+            lines.append(f"Session: {session}")
+        client_bits: List[str] = []
+        if fields.get("device"):
+            client_bits.append(fields["device"])
+        if fields.get("os"):
+            client_bits.append(fields["os"])
+        if fields.get("browser"):
+            client_bits.append(fields["browser"])
+        if client_bits:
+            lines.append(f"Client: {', '.join(client_bits)}")
+        if fields.get("ip"):
+            lines.append(f"IP address: {fields['ip']}")
+        return lines
+    if action == "login_failed":
+        lines = [f"Login denied for {_format_user(fields)}"]
+        if fields.get("reason"):
+            lines.append(f"Reason: {fields['reason']}")
+        if fields.get("ip"):
+            lines.append(f"IP address: {fields['ip']}")
+        return lines
+    if action == "auth_bruteforce_detected":
+        lines = ["Brute-force login pattern detected"]
+        lines.append(f"Target: {_format_user(fields)}")
+        failures = fields.get("failures")
+        if isinstance(failures, dict):
+            for key, value in failures.items():
+                lines.append(f"{key}: {value}")
+        if fields.get("ip"):
+            lines.append(f"IP address: {fields['ip']}")
+        if fields.get("window_seconds"):
+            lines.append(f"Observation window: {fields['window_seconds']} seconds")
+        return lines
+    if action == "registration_success":
+        ip_raw = fields.get("ip")
+        ip_display = "localhost" if ip_raw in {"127.0.0.1", "::1"} else ip_raw
+        display_name = fields.get("display_name") or "Unknown"
+        username = fields.get("username")
+        user_id = fields.get("user_id")
+        user_agent = fields.get("user_agent") or "Unknown user agent"
+        lines = ["Account registered"]
+        lines.append(f"Display name: {display_name}")
+        lines.append(f"Username: {_clean_username(username) if username else 'unknown'}")
+        if ip_display:
+            lines.append(f"IP: {ip_display}")
+        if user_agent:
+            lines.append(f"User agent: {user_agent}")
+        if user_id is not None:
+            lines.append(f"User ID: {user_id}")
+        return lines
+    if action == "password_changed":
+        lines = [f"Password changed for {_format_user(fields)}"]
+        lines.append(f"Other sessions revoked: {_yes_no(fields.get('logout_others'))}")
+        if fields.get("ip"):
+            lines.append(f"IP address: {fields['ip']}")
+        return lines
+    if action == "logout":
+        lines = [f"Logout recorded for {_format_user(fields)}"]
+        if fields.get("session_id"):
+            lines.append(f"Session: {fields['session_id']}")
+        if fields.get("ip"):
+            lines.append(f"IP address: {fields['ip']}")
+        return lines
+    if action == "admin_delete_user":
+        return [
+            "Account removal",
+            f"Actor: {_format_actor(fields, 'actor')}",
+            f"Target: {_format_actor(fields, 'target')}",
+        ]
+    if action == "admin_suspend_user":
+        lines = [
+            "User suspension",
+            f"Actor: {_format_actor(fields, 'actor')}",
+            f"Target: {_format_actor(fields, 'target')}",
+        ]
+        if fields.get("reason"):
+            lines.append(f"Reason: {fields.get('reason')}")
+        return lines
+    if action == "admin_unsuspend_user":
+        return [
+            "User unsuspension",
+            f"Actor: {_format_actor(fields, 'actor')}",
+            f"Target: {_format_actor(fields, 'target')}",
+        ]
+    if action == "admin_verify_toggle":
+        return [
+            "User verification",
+            f"Actor: {_format_actor(fields, 'actor')}",
+            f"Target: {_format_actor(fields, 'target')}",
+            f"Verified: {_yes_no(fields.get('verified'))}",
+        ]
+    if action == "self_delete_account":
+        return [f"User {_format_user(fields)} deleted their account"]
+    if action == "auto_suspension_public_spam":
+        lines = [
+            f"Automatic suspension triggered for {_format_user(fields)}",
+        ]
+        match_type = fields.get("match_type")
+        if match_type:
+            lines.append(f"Match type: {match_type}")
+        similar = fields.get("similar_messages")
+        occurrences = fields.get("occurrences")
+        if similar:
+            lines.append(f"Similar messages detected: {similar}")
+        if occurrences and not similar:
+            lines.append(f"Occurrences: {occurrences}")
+        if fields.get("window_seconds"):
+            lines.append(f"Observation window: {fields['window_seconds']} seconds")
+        if fields.get("reason"):
+            lines.append(f"Reason: {fields['reason']}")
+        return lines
+    if action == "auto_suspension_public_burst":
+        lines = [
+            f"Automatic suspension triggered for {_format_user(fields)}",
+            f"Messages sent: {fields.get('count')} within {fields.get('window_seconds')} seconds",
+        ]
+        if fields.get("reason"):
+            lines.append(f"Reason: {fields['reason']}")
+        return lines
+    if action == "public_message_burst":
+        return [
+            f"Rapid messaging spike for {_format_user(fields)}",
+            f"Messages sent: {fields.get('count')} within {fields.get('window_seconds')} seconds",
+        ]
+    if action == "blocklist_add":
+        added = fields.get("added") or []
+        lines = [f"Blocklist updated by {_format_actor(fields, 'actor')}"]
+        if added:
+            lines.append(f"Added entries: {', '.join(added)}")
+        total = len(fields.get("words") or [])
+        lines.append(f"Total entries: {total}")
+        return lines
+    if action == "blocklist_remove":
+        removed = fields.get("removed") or []
+        lines = [f"Blocklist cleaned by {_format_actor(fields, 'actor')}"]
+        if removed:
+            lines.append(f"Removed entries: {', '.join(removed)}")
+        total = len(fields.get("words") or [])
+        lines.append(f"Total entries: {total}")
+        return lines
+    return [f"{action.replace('_', ' ').capitalize()}"] + [
+        f"{key.replace('_', ' ').capitalize()}: {value}"
+        for key, value in fields.items()
+        if value is not None
+    ]
+
+
+def _render_public_chat(action: str, fields: Dict[str, Any]) -> List[str]:
+    if action == "message_created":
+        lines = [f"Message #{fields.get('message_id')} sent by {_format_user(fields)}"]
+        if fields.get("reply_to"):
+            lines.append(f"In reply to message #{fields['reply_to']}")
+        attachments = fields.get("attachments")
+        if attachments:
+            lines.append(f"Attachments: {_plural('file', attachments)}")
+        
+        # If content was censored, log both raw and censored versions
+        if fields.get("raw_content") is not None:
+            lines.append("Raw content (before censoring):")
+            for line in unescape(fields["raw_content"]).splitlines():
+                lines.append(f"| {line}")
+            lines.append("Censored content (stored):")
+            for line in unescape(fields.get("censored_content", fields.get("content", ""))).splitlines():
+                lines.append(f"| {line}")
+        elif fields.get("content"):
+            lines.append("Content:")
+            for line in unescape(fields["content"]).splitlines():
+                lines.append(f"| {line}")
+        return lines
+    if action == "message_edited":
+        lines = [f"Message #{fields.get('message_id')} edited by {_format_user(fields)}"]
+        if fields.get("reply_to"):
+            lines.append(f"Reply to #{fields['reply_to']}")
+        if fields.get("previous_content"):
+            lines.append("Previous content:")
+            for line in unescape(fields["previous_content"] or "").splitlines() or [""]:
+                lines.append(f"| {line}")
+        
+        # If content was censored, log both raw and censored versions
+        if fields.get("raw_content") is not None:
+            lines.append("Raw content (before censoring):")
+            for line in unescape(fields["raw_content"]).splitlines():
+                lines.append(f"| {line}")
+            lines.append("Censored content (stored):")
+            for line in unescape(fields.get("censored_content", fields.get("content", ""))).splitlines():
+                lines.append(f"| {line}")
+        elif fields.get("content"):
+            lines.append("New content:")
+            for line in unescape(fields["content"] or "").splitlines() or [""]:
+                lines.append(f"| {line}")
+        
+        return lines
+    if action == "message_deleted":
+        lines = [
+            f"Message #{fields.get('message_id')} deleted",
+            f"Actor: {_format_actor(fields, 'actor')}",
+        ]
+        if fields.get("original_author_id") is not None:
+            lines.append(f"Original author: user #{fields['original_author_id']}")
+        if fields.get("content"):
+            lines.append("Previous content:")
+            for line in unescape(fields["content"]).splitlines():
+                lines.append(f"| {line}")
+        return lines
+    if action == "reaction_update":
+        lines = [
+            f"Reaction {fields.get('action', 'updated')} on message #{fields.get('message_id')}",
+            f"User: {_format_user(fields)}",
+        ]
+        if fields.get("emoji"):
+            lines.append(f"Emoji: {fields['emoji']}")
+        return lines
+    return [f"{action.replace('_', ' ').capitalize()}"] + [
+        f"{key.replace('_', ' ').capitalize()}: {value}"
+        for key, value in fields.items()
+        if value is not None
+    ]
+
+
+def _render_dm(action: str, fields: Dict[str, Any]) -> List[str]:
+    if action in {"message_sent", "message_sent_ws"}:
+        lines = [
+            f"Direct message #{fields.get('dm_envelope_id')} sent",
+            f"Sender: {_format_actor(fields, 'sender')}",
+        ]
+        if fields.get("recipient_id") is not None:
+            lines.append(f"Recipient: user id {fields['recipient_id']}")
+        attachments = fields.get("attachment_count")
+        if attachments:
+            lines.append(f"Attachments: {_plural('file', attachments)}")
+        if fields.get("reply_to"):
+            lines.append(f"In reply to DM #{fields['reply_to']}")
+        return lines
+    if action == "message_edited":
+        return [
+            f"Direct message #{fields.get('dm_envelope_id')} edited",
+            f"Author: {_format_user(fields)}",
+        ]
+    if action == "message_deleted":
+        lines = [
+            f"Direct message #{fields.get('dm_envelope_id')} deleted",
+            f"Actor: {_format_user(fields)}",
+        ]
+        if fields.get("recipient_id") is not None:
+            lines.append(f"Recipient: user id {fields['recipient_id']}")
+        return lines
+    if action == "reaction_update":
+        lines = [
+            f"Reaction {fields.get('action', 'updated')} on DM #{fields.get('dm_envelope_id')}",
+            f"User: {_format_user(fields)}",
+        ]
+        if fields.get("emoji"):
+            lines.append(f"Emoji: {fields['emoji']}")
+        return lines
+    return [f"{action.replace('_', ' ').capitalize()}"] + [
+        f"{key.replace('_', ' ').capitalize()}: {value}"
+        for key, value in fields.items()
+        if value is not None
+    ]
+
+
+def _render_access(action: str, fields: Dict[str, Any]) -> List[str]:
+    ip_raw = fields.get("ip")
+    ip_display = "localhost" if ip_raw in {"127.0.0.1", "::1"} else ip_raw
+    if action == "http_request":
+        first_line = f"{fields.get('method')} {fields.get('path')}"
+        if ip_display:
+            first_line += f" from {ip_display}"
+        first_line += f" -> {fields.get('status')}"
+        lines = [first_line]
+        if fields.get("user"):
+            lines.append(f"Authenticated user: {_clean_username(fields['user'])}")
+        return lines
+    if action == "http_error":
+        first_line = f"HTTP error during {fields.get('method')} {fields.get('path')}"
+        if ip_display:
+            first_line += f" from {ip_display}"
+        lines = [first_line]
+        if fields.get("error"):
+            lines.append(f"Exception: {fields['error']}")
+        if fields.get("user"):
+            lines.append(f"Authenticated user: {_clean_username(fields['user'])}")
+        return lines
+    if action == "ws_connect":
+        lines = ["WebSocket connected"]
+        if fields.get("path"):
+            lines.append(f"Endpoint: {fields['path']}")
+        if ip_display:
+            lines.append(f"IP: {ip_display}")
+        return lines
+    if action == "ws_disconnect":
+        lines = ["WebSocket disconnected"]
+        if fields.get("path"):
+            lines.append(f"Endpoint: {fields['path']}")
+        if fields.get("code") is not None:
+            reason = fields.get("reason") or "no reason"
+            lines.append(f"Code {fields['code']} ({reason})")
+        if ip_display:
+            lines.append(f"IP: {ip_display}")
+        return lines
+    if action == "ws_event":
+        event_name = fields.get("event")
+        path = fields.get("path")
+        first_line = "WS"
+        if path:
+            first_line += f" {path}"
+        if ip_display:
+            first_line += f" from {ip_display}"
+        if event_name:
+            first_line += f" -> {event_name}"
+        lines = [first_line]
+        if fields.get("user"):
+            lines.append(f"Authenticated user: {_format_user(fields, 'user', 'user_id')}")
+        for key, value in fields.items():
+            if key in {"path", "event", "user", "user_id", "ip"} or value is None:
+                continue
+            lines.append(f"{key.replace('_', ' ').capitalize()}: {value}")
+        return lines
+    return [f"{action.replace('_', ' ').capitalize()}"] + [
+        f"{key.replace('_', ' ').capitalize()}: {value}"
+        for key, value in fields.items()
+        if value is not None
+    ]
+
+
+def _log_event(
+    logger: logging.Logger,
+    renderer: Callable[[str, Dict[str, Any]], List[str]],
+    action: str,
+    severity: str,
+    fields: Dict[str, Any],
+) -> None:
+    lines = renderer(action, fields)
+    if not lines:
+        return
+    level = getattr(logging, severity.upper(), logging.INFO)
+    logger.log(level, "\n".join(lines))
+
+
+def log_security(action: str, severity: str = "info", **fields: Any) -> None:
+    _log_event(security_logger, _render_security, action, severity, fields)
+
+
+def log_public_chat(action: str, severity: str = "info", **fields: Any) -> None:
+    _log_event(public_chat_logger, _render_public_chat, action, severity, fields)
+
+
+def log_dm(action: str, severity: str = "info", **fields: Any) -> None:
+    sanitized_fields = {key: value for key, value in fields.items() if key != "content"}
+    _log_event(dm_logger, _render_dm, action, severity, sanitized_fields)
+
+
+def log_access(action: str, severity: str = "info", **fields: Any) -> None:
+    _log_event(access_logger, _render_access, action, severity, fields)
+

backend/security/profanity.py

@@ -0,0 +1,694 @@
+from __future__ import annotations
+
+import json
+import re
+import unicodedata
+from pathlib import Path
+from threading import RLock
+from typing import Iterable, List, Set, Tuple
+
+from better_profanity import Profanity
+
+BLOCKLIST_PATH = Path(__file__).resolve().parent.parent / "data" / "profanity" / "blocklist.json"
+BLOCKLIST_PATH.parent.mkdir(parents=True, exist_ok=True)
+
+_CUSTOM_RU_TERMS: Set[str] = {
+    "бляд", "блять", "бля", "сука", "суки", "сучка", "мразь", "ебан",
+    "ебать", "ебёт", "ебет", "ебаная", "ебаная", "уёбок", "уебок", "уебище", "пизда",
+    "пиздец", "хуй", "хуя", "хуе", "хуё", "хуйня", "хер", "гондон",
+    "долбоёб", "долбоеб", "дебил", "член", "проститутка", "проститутки",
+    "урод", "хуесос", "хуесосы", "хуесосов", "хуесоса", "сос", "пидор",
+    "пидоры", "пидорас", "пидорасы", "пидорасов",
+}
+
+_ADULT_TERMS: Set[str] = {
+    "порно", "порнуха", "эротика", "эротический", "секс", "сексуальный",
+    "инцест", "порнография", "порностудия", "порновидео", "порносайт",
+    "сексчат", "сексчатик", "секслайв", "сексвидео",
+}
+
+_STATIC_TERMS: Set[str] = set(term.lower() for term in (_CUSTOM_RU_TERMS | _ADULT_TERMS))
+
+# Words that should never be flagged as profanity (whitelist)
+_WHITELIST: Set[str] = {
+    "говно",  # Allow this word
+}
+
+# Phrase patterns - these will be applied to normalized text (without special chars)
+_PHRASE_PATTERNS: Tuple[re.Pattern[str], ...] = (
+    re.compile(r"\bmax\s+is\s+better\b", re.IGNORECASE | re.UNICODE),
+    re.compile(r"\bмакс\s+лучше\b", re.IGNORECASE | re.UNICODE),
+    re.compile(r"\bfromchat\s+г[ао]вно\b", re.IGNORECASE | re.UNICODE),
+    re.compile(r"\bфромчат\s+г[ао]вно\b", re.IGNORECASE | re.UNICODE),
+    re.compile(r"\b18\+\b", re.IGNORECASE | re.UNICODE),
+    re.compile(r"\bxxx\b", re.IGNORECASE | re.UNICODE),
+    re.compile(r"\bайфон\s+топ\b", re.IGNORECASE | re.UNICODE),
+    re.compile(r"\bсамсунг\s+г[ао]вно\b", re.IGNORECASE | re.UNICODE),
+)
+
+# Patterns to check in original text (before normalization) to catch visual bypasses
+# These patterns check for special character combinations that visually form letters
+_ORIGINAL_TEXT_PATTERNS: Tuple[re.Pattern[str], ...] = (
+    # Catch "}{" used to visually form "х" followed by "С0С" or similar patterns
+    # This catches "хуесос" written as "}{¥€С0С" or variations
+    # Matches: }{ + any characters (including special chars) + С/с + 0 + С/с
+    # The pattern allows any characters between to catch special chars like ¥€
+    re.compile(r"}\{.*?[сcСC].*?[0оoОO].*?[сcСC]", re.IGNORECASE | re.UNICODE),
+    # Also catch "}{" followed by "уесос" with 0 instead of о
+    re.compile(r"}\{.*?[уyУY].*?[еeЕE].*?[сcСC].*?[0оoОO].*?[сcСC]", re.IGNORECASE | re.UNICODE),
+)
+
+# Map for normalizing homoglyphs (similar-looking characters)
+# Maps English/Latin characters to their Cyrillic equivalents and vice versa
+# Also includes Greek, full-width, and other Unicode variants
+_LEET_MAP = {
+    # Numbers to letters
+    "0": "о",
+    "1": "и",
+    "3": "е",
+    "4": "а",
+    # Latin to Cyrillic (lowercase)
+    "a": "а",
+    "c": "с",
+    "e": "е",
+    "f": "ф",
+    "g": "г",
+    "i": "и",
+    "m": "м",
+    "n": "н",
+    "o": "о",
+    "p": "п",
+    "s": "с",
+    "t": "т",
+    "u": "у",
+    "v": "в",
+    "x": "х",
+    "y": "у",
+    "z": "з",  # English 'z' to Cyrillic 'з'
+    # Latin to Cyrillic (uppercase)
+    "A": "а",
+    "C": "с",
+    "E": "е",
+    "F": "ф",
+    "G": "г",
+    "I": "и",
+    "M": "м",
+    "N": "н",
+    "O": "о",
+    "P": "п",
+    "S": "с",
+    "T": "т",
+    "U": "у",
+    "V": "в",
+    "X": "х",
+    "Y": "у",
+    "Z": "з",  # English 'Z' to Cyrillic 'з'
+    # Greek letters that look like Cyrillic/Latin
+    "α": "а",  # Greek alpha
+    "Α": "а",
+    "ο": "о",  # Greek omicron
+    "Ο": "о",
+    "ρ": "р",  # Greek rho (looks like Cyrillic р)
+    "Ρ": "р",
+    "υ": "у",  # Greek upsilon
+    "Υ": "у",
+    "χ": "х",  # Greek chi
+    "Χ": "х",
+    "ε": "е",  # Greek epsilon
+    "Ε": "е",
+    "ι": "и",  # Greek iota
+    "Ι": "и",
+    "ν": "н",  # Greek nu
+    "Ν": "н",
+    "μ": "м",  # Greek mu
+    "Μ": "м",
+    "π": "п",  # Greek pi
+    "Π": "п",
+    "τ": "т",  # Greek tau
+    "Τ": "т",
+    "γ": "г",  # Greek gamma
+    "Γ": "г",
+    "σ": "с",  # Greek sigma
+    "Σ": "с",
+    "φ": "ф",  # Greek phi
+    "Φ": "ф",
+    # Full-width Latin characters
+    "ａ": "а",
+    "Ａ": "а",
+    "ｃ": "с",
+    "Ｃ": "с",
+    "ｅ": "е",
+    "Ｅ": "е",
+    "ｆ": "ф",
+    "Ｆ": "ф",
+    "ｇ": "г",
+    "Ｇ": "г",
+    "ｉ": "и",
+    "Ｉ": "и",
+    "ｍ": "м",
+    "Ｍ": "м",
+    "ｎ": "н",
+    "Ｎ": "н",
+    "ｏ": "о",
+    "Ｏ": "о",
+    "ｐ": "п",
+    "Ｐ": "п",
+    "ｓ": "с",
+    "Ｓ": "с",
+    "ｔ": "т",
+    "Ｔ": "т",
+    "ｕ": "у",
+    "Ｕ": "у",
+    "ｖ": "в",
+    "Ｖ": "в",
+    "ｘ": "х",
+    "Ｘ": "х",
+    "ｙ": "у",
+    "Ｙ": "у",
+    "ｚ": "з",  # Full-width 'z' to Cyrillic 'з'
+    "Ｚ": "з",
+    # Cyrillic to canonical Cyrillic (identity mappings)
+    "а": "а",
+    "с": "с",
+    "е": "е",
+    "ё": "е",
+    "ф": "ф",
+    "г": "г",
+    "и": "и",
+    "м": "м",
+    "н": "н",
+    "о": "о",
+    "п": "п",
+    "т": "т",
+    "у": "у",
+    "ү": "у",  # Cyrillic capital U (U+04AE)
+    "Ү": "у",  # Cyrillic capital U (U+04AE)
+    "в": "в",
+    "х": "х",
+    "р": "р",
+    "з": "з",  # Cyrillic 'з'
+    "д": "д",  # Cyrillic 'д'
+    "б": "б",  # Cyrillic 'б'
+    "л": "л",  # Cyrillic 'л'
+    "я": "я",  # Cyrillic 'я'
+    "н": "н",  # Already mapped, but explicit
+    # Special characters
+    "@": "а",
+    # Multi-character visual bypasses (handled separately in preprocessing)
+    # "}{" visually forms "х" - handled in _preprocess_visual_bypasses
+}
+
+_RAW_PHRASE_GROUPS: Tuple[Tuple[str, Tuple[str, ...]], ...] = (
+    ("generic", ("айфон", "топ")),
+    ("generic", ("самсунг", "говно")),
+)
+
+_SENSITIVE_PHRASE_PATH = Path("data/profanity/sensitive_phrases.json")
+_PHRASE_CACHE: dict[str, Tuple[Tuple[str, ...], ...]] = {}
+
+
+def _preprocess_visual_bypasses(text: str) -> str:
+    """
+    Preprocess text to convert multi-character visual bypasses to their intended letters.
+    This handles cases like "}{" visually forming "х".
+    """
+    result = text
+    # Convert "}{" to "х" (visual bypass for Cyrillic х)
+    # The curly braces visually form the letter х when placed together
+    result = result.replace("}{", "х")
+    return result
+
+
+def _normalize_char(ch: str) -> str:
+    """Normalize a single character, mapping homoglyphs to canonical form."""
+    # First try direct mapping (preserves case for non-mapped chars)
+    if ch in _LEET_MAP:
+        return _LEET_MAP[ch]
+    # Then try lowercase mapping
+    lower = ch.lower()
+    if lower in _LEET_MAP:
+        return _LEET_MAP[lower]
+    # If no mapping and character is ASCII letter, return lowercase
+    # This preserves English words like "fromchat" as-is
+    if ch.isascii() and ch.isalpha():
+        return lower
+    # For other characters, return lowercase for consistency
+    return lower
+
+
+def _normalize_token(token: str) -> str:
+    """Normalize a token by mapping all homoglyphs."""
+    return "".join(_normalize_char(ch) for ch in token)
+
+
+def _normalize_text_for_profanity(text: str) -> str:
+    """
+    Normalize entire text by mapping homoglyphs to canonical forms.
+    This prevents bypasses like using English 'u' instead of Russian 'у'.
+    """
+    return "".join(_normalize_char(ch) for ch in text)
+
+
+def _strip_zero_width_chars(text: str) -> str:
+    """
+    Remove zero-width characters that could be used to bypass filters.
+    """
+    # Zero-width space, zero-width non-joiner, zero-width joiner, etc.
+    zero_width_chars = [
+        '\u200B',  # Zero-width space
+        '\u200C',  # Zero-width non-joiner
+        '\u200D',  # Zero-width joiner
+        '\uFEFF',  # Zero-width no-break space
+        '\u2060',  # Word joiner
+        '\u2061',  # Function application
+        '\u2062',  # Invisible times
+        '\u2063',  # Invisible separator
+        '\u2064',  # Invisible plus
+    ]
+    result = text
+    for zw_char in zero_width_chars:
+        result = result.replace(zw_char, '')
+    return result
+
+
+def _extract_alphanumeric_with_mapping(text: str, preserve_spaces: bool = False) -> tuple[str, list[int]]:
+    """
+    Extract only alphanumeric characters from text and create a mapping
+    from normalized positions to original positions.
+    
+    Args:
+        preserve_spaces: If True, preserve spaces in the normalized text (for phrase matching)
+    
+    Returns:
+        (normalized_text, position_map) where position_map[i] is the original
+        position of the i-th character in normalized_text
+    """
+    # First preprocess visual bypasses (like "}{" -> "х")
+    text = _preprocess_visual_bypasses(text)
+    
+    # Then normalize Unicode (composed vs decomposed)
+    normalized_unicode = unicodedata.normalize('NFKC', text)
+    
+    # For phrase matching, convert zero-width chars to spaces instead of stripping
+    if preserve_spaces:
+        zero_width_chars = ['\u200B', '\u200C', '\u200D', '\uFEFF', '\u2060', '\u2061', '\u2062', '\u2063', '\u2064']
+        for zw_char in zero_width_chars:
+            normalized_unicode = normalized_unicode.replace(zw_char, ' ')
+    else:
+        # Strip zero-width characters
+        normalized_unicode = _strip_zero_width_chars(normalized_unicode)
+    
+    normalized = []
+    position_map = []
+    
+    for i, ch in enumerate(normalized_unicode):
+        # Check if character is alphanumeric (including Cyrillic)
+        if ch.isalnum():
+            # For phrase matching, preserve ASCII letters as-is (just lowercase)
+            # to allow English words in patterns to match
+            if preserve_spaces and ch.isascii() and ch.isalpha():
+                normalized.append(ch.lower())
+            else:
+                # Normalize this character (homoglyphs, Cyrillic, etc.)
+                normalized.append(_normalize_char(ch))
+            position_map.append(i)
+        elif preserve_spaces:
+            # For phrase matching, treat any whitespace or non-alphanumeric as word separator
+            if ch.isspace() or not ch.isalnum():
+                # Normalize to single space to allow patterns to match
+                if normalized and normalized[-1] != ' ':  # Don't add consecutive spaces
+                    normalized.append(' ')
+                    position_map.append(i)
+    
+    return "".join(normalized), position_map
+
+
+def _check_profanity_substrings(normalized_text: str, profane_words: Set[str]) -> list[tuple[int, int]]:
+    """
+    Check for profane words as substrings or subsequences in normalized text.
+    This catches cases like "хуй" in "хууй" (with extra characters).
+    Returns list of (start, end) positions where profanity is found.
+    """
+    spans = []
+    normalized_lower = normalized_text.lower()
+    
+    for word in profane_words:
+        word_lower = word.lower()
+        
+        # First try exact substring match
+        start = 0
+        while True:
+            pos = normalized_lower.find(word_lower, start)
+            if pos == -1:
+                break
+            spans.append((pos, pos + len(word_lower)))
+            start = pos + 1
+        
+        # Also check if profane word appears as a subsequence (allowing extra chars)
+        # This catches cases like "хуй" in "хууй" or "х}{¥€уй" -> "хууй"
+        # Now applies to ALL words, not just length >= 4, to prevent bypasses
+        word_chars = list(word_lower)
+        text_chars = list(normalized_lower)
+        
+        # Stricter span limits based on word length to prevent false positives
+        # Shorter words get much stricter limits
+        if len(word_lower) <= 3:
+            max_span_ratio = 1.3  # Very strict for 3-char words (e.g., "хуй")
+        elif len(word_lower) == 4:
+            max_span_ratio = 1.4  # Strict for 4-char words
+        elif len(word_lower) <= 5:
+            max_span_ratio = 1.5  # Moderate for 5-char words
+        else:
+            max_span_ratio = 1.8  # Slightly more lenient for longer words
+        
+        # Try to find the word as a subsequence
+        i = 0  # position in text
+        j = 0  # position in word
+        seq_start = None
+        
+        while i < len(text_chars) and j < len(word_chars):
+            if text_chars[i] == word_chars[j]:
+                if seq_start is None:
+                    seq_start = i
+                j += 1
+                if j == len(word_chars):
+                    # Found the word as subsequence
+                    seq_end = i + 1
+                    # Check if the span is reasonable (not too long)
+                    span_length = seq_end - seq_start
+                    max_allowed_span = int(len(word_lower) * max_span_ratio)
+                    if span_length <= max_allowed_span:
+                        # Only add if it's not already covered by exact match
+                        if (seq_start, seq_end) not in spans:
+                            spans.append((seq_start, seq_end))
+                    # Reset to find next occurrence - continue from after the end of this match
+                    next_start = seq_start + 1
+                    seq_start = None
+                    j = 0
+                    i = next_start
+                    continue
+            i += 1
+    
+    return spans
+
+
+def _check_profanity_in_normalized(normalized_text: str) -> bool:
+    """
+    Check if normalized text contains profanity.
+    Uses both better_profanity library and substring matching for better detection.
+    
+    Returns True if profanity is found.
+    """
+    if not normalized_text:
+        return False
+    
+    # Check normalized text for profanity using better_profanity
+    censored = _profanity.censor(normalized_text, censor_char="\\*")
+    
+    # Check if better_profanity found anything
+    if "*" in censored:
+        return True
+    
+    # Also check for profane words as substrings (to catch cases like "хуй" in "хууй" or "хуйня")
+    profane_words = _STATIC_TERMS
+    substring_spans = _check_profanity_substrings(normalized_text, profane_words)
+    
+    # If we found any substring matches, there's profanity
+    if substring_spans:
+        return True
+    
+    return False
+
+
+def _tokenize_with_spans(text: str) -> List[Tuple[int, int, str]]:
+    tokens: List[Tuple[int, int, str]] = []
+    start: int | None = None
+    buffer: List[str] = []
+
+    for idx, ch in enumerate(text):
+        if ch.isalnum() or ch in {"@", "#", "_"}:
+            if start is None:
+                start = idx
+            buffer.append(ch)
+        else:
+            if buffer and start is not None:
+                token_raw = "".join(buffer)
+                tokens.append((start, idx, _normalize_token(token_raw)))
+                buffer.clear()
+                start = None
+    if buffer and start is not None:
+        token_raw = "".join(buffer)
+        tokens.append((start, len(text), _normalize_token(token_raw)))
+    return tokens
+
+
+def _edit_distance_limited(a: str, b: str, max_distance: int = 1) -> bool:
+    if a == b:
+        return True
+    if max_distance <= 0:
+        return False
+    if abs(len(a) - len(b)) > max_distance:
+        return False
+
+    previous = list(range(len(b) + 1))
+    for i, ca in enumerate(a, 1):
+        current = [i]
+        best = current[0]
+        for j, cb in enumerate(b, 1):
+            insert_cost = current[j - 1] + 1
+            delete_cost = previous[j] + 1
+            replace_cost = previous[j - 1] + (0 if ca == cb else 1)
+            cost = min(insert_cost, delete_cost, replace_cost)
+            current.append(cost)
+            if cost < best:
+                best = cost
+        if best > max_distance:
+            return False
+        previous = current
+    return previous[-1] <= max_distance
+
+
+def _load_sensitive_phrases() -> List[Tuple[str, ...]]:
+    if not _SENSITIVE_PHRASE_PATH.exists():
+        return []
+    try:
+        payload = json.loads(_SENSITIVE_PHRASE_PATH.read_text(encoding="utf-8"))
+        phrases: List[Tuple[str, ...]] = []
+        if isinstance(payload, list):
+            for entry in payload:
+                if isinstance(entry, list) and entry:
+                    normalized = tuple(str(part).strip() for part in entry if str(part).strip())
+                    if normalized:
+                        phrases.append(normalized)
+        return phrases
+    except Exception:
+        return []
+
+
+def _get_phrases(group: str) -> Tuple[Tuple[str, ...], ...]:
+    if group not in _PHRASE_CACHE:
+        base = [phrase for key, phrase in _RAW_PHRASE_GROUPS if key == group]
+        if group == "sensitive":
+            base.extend(_load_sensitive_phrases())
+        _PHRASE_CACHE[group] = tuple(
+            tuple(_normalize_token(part) for part in phrase)
+            for phrase in base
+        )
+    return _PHRASE_CACHE[group]
+
+
+def _find_fuzzy_phrase_spans(text: str, group: str = "generic") -> List[Tuple[int, int]]:
+    tokens = _tokenize_with_spans(text)
+    if not tokens:
+        return []
+
+    spans: List[Tuple[int, int]] = []
+    normalized_phrases = _get_phrases(group)
+
+    for index in range(len(tokens)):
+        for phrase in normalized_phrases:
+            if index + len(phrase) > len(tokens):
+                continue
+            matches = True
+            for offset, target in enumerate(phrase):
+                token = tokens[index + offset][2]
+                if not _edit_distance_limited(token, target):
+                    matches = False
+                    break
+            if matches:
+                span_start = tokens[index][0]
+                span_end = tokens[index + len(phrase) - 1][1]
+                spans.append((span_start, span_end))
+    return spans
+
+_dictionary_lock = RLock()
+_blocklist_signature: Tuple[str, ...] | None = None
+_profanity = Profanity()
+
+
+def _normalize_words(words: Iterable[str]) -> Set[str]:
+    normalized: Set[str] = set()
+    for raw in words:
+        if not raw:
+            continue
+        cleaned = re.sub(r"\s+", " ", str(raw)).strip().lower()
+        if cleaned:
+            normalized.add(cleaned)
+    return normalized
+
+
+def _load_blocklist() -> Set[str]:
+    if not BLOCKLIST_PATH.exists():
+        return set()
+    try:
+        data = json.loads(BLOCKLIST_PATH.read_text(encoding="utf-8"))
+        if isinstance(data, list):
+            return _normalize_words(data)
+    except Exception:
+        pass
+    return set()
+
+
+def _write_blocklist(words: Iterable[str]) -> None:
+    BLOCKLIST_PATH.write_text(
+        json.dumps(sorted(words), ensure_ascii=False, indent=2) + "\n",
+        encoding="utf-8"
+    )
+
+
+def _rebuild_dictionary(force: bool = False) -> None:
+    global _profanity, _blocklist_signature
+    with _dictionary_lock:
+        blocklist_list = sorted(_load_blocklist())
+        signature = tuple(blocklist_list)
+        if not force and _blocklist_signature == signature and _blocklist_signature is not None:
+            return
+
+        profanity = Profanity()
+        profanity.load_censor_words()
+        # Remove whitelisted words from the default word list
+        try:
+            for word in _WHITELIST:
+                profanity.remove_censor_words([word])
+        except AttributeError:
+            # If remove_censor_words doesn't exist, we'll handle it in post-processing
+            pass
+        combined = set(_STATIC_TERMS)
+        combined.update(blocklist_list)
+        # Remove whitelisted words from our custom terms
+        combined -= _WHITELIST
+        if combined:
+            profanity.add_censor_words(list(combined))
+
+        _profanity = profanity
+        _blocklist_signature = signature
+
+
+def _check_phrase_patterns(text: str) -> bool:
+    """
+    Check if text matches any phrase patterns.
+    Returns True if any pattern matches.
+    """
+    # Normalize text for phrase matching (remove special chars but preserve spaces)
+    normalized_text, _ = _extract_alphanumeric_with_mapping(text, preserve_spaces=True)
+    normalized_lower = normalized_text.lower()
+    
+    # Check phrase patterns
+    for pattern in _PHRASE_PATTERNS:
+        if pattern.search(normalized_lower):
+            return True
+    
+    # Check fuzzy phrase spans
+    if _find_fuzzy_phrase_spans(normalized_lower, "generic"):
+        return True
+    
+    return False
+
+
+def contains_profanity(text: str) -> bool:
+    """
+    Check if text contains profanity.
+    Returns True if profanity is detected.
+    """
+    if not text:
+        return False
+
+    _rebuild_dictionary()
+    
+    # Check original text patterns first (before normalization) to catch visual bypasses
+    # like "}{" used to form "х"
+    for pattern in _ORIGINAL_TEXT_PATTERNS:
+        if pattern.search(text):
+            return True
+    
+    # Check phrase patterns
+    if _check_phrase_patterns(text):
+        return True
+    
+    # Normalize text for whitelist matching (to handle special characters)
+    normalized_for_whitelist, _ = _extract_alphanumeric_with_mapping(text)
+    normalized_for_whitelist_lower = normalized_for_whitelist.lower()
+    
+    # Check if text contains whitelisted words - if the entire text is a whitelisted word, skip profanity check
+    for whitelist_word in _WHITELIST:
+        normalized_whitelist, _ = _extract_alphanumeric_with_mapping(whitelist_word)
+        normalized_whitelist_lower = normalized_whitelist.lower()
+        
+        # Check if the normalized text exactly matches a whitelisted word
+        if normalized_for_whitelist_lower == normalized_whitelist_lower:
+            return False
+    
+    # Extract only alphanumeric characters and normalize homoglyphs
+    # This removes special characters, emojis, etc. that could be used to bypass the filter
+    normalized_text, _ = _extract_alphanumeric_with_mapping(text)
+    
+    # Check profanity on normalized text (without special characters)
+    return _check_profanity_in_normalized(normalized_text)
+
+
+def contains_sensitive_phrase(text: str) -> bool:
+    if not text:
+        return False
+    if _find_fuzzy_phrase_spans(text, "sensitive"):
+        return True
+    return False
+
+
+def get_blocklist() -> List[str]:
+    with _dictionary_lock:
+        return sorted(_load_blocklist())
+
+
+def add_to_blocklist(words: Iterable[str]) -> Tuple[List[str], List[str]]:
+    normalized = _normalize_words(words)
+    if not normalized:
+        return [], get_blocklist()
+
+    with _dictionary_lock:
+        current = _load_blocklist()
+        added = sorted(normalized - current)
+        if not added:
+            return [], sorted(current)
+
+        updated = sorted(current | normalized)
+        _write_blocklist(updated)
+        _rebuild_dictionary(force=True)
+        return added, updated
+
+
+def remove_from_blocklist(words: Iterable[str]) -> Tuple[List[str], List[str]]:
+    normalized = _normalize_words(words)
+    if not normalized:
+        return [], get_blocklist()
+
+    with _dictionary_lock:
+        current = _load_blocklist()
+        removed = sorted(word for word in normalized if word in current)
+        if not removed:
+            return [], sorted(current)
+
+        updated = sorted(current - normalized)
+        _write_blocklist(updated)
+        _rebuild_dictionary(force=True)
+        return removed, updated
+

backend/security/rate_limit.py

@@ -0,0 +1,232 @@
+from __future__ import annotations
+
+import asyncio
+import logging
+import time
+from typing import Callable
+from fastapi import Request
+from slowapi import Limiter
+from slowapi.util import get_remote_address
+
+from backend.shared.utils import get_client_ip
+
+logger = logging.getLogger("uvicorn.error")
+
+def get_ip_key(request: Request) -> str:
+    """Get rate limit key based on IP address."""
+    return get_client_ip(request) or get_remote_address(request)
+
+# Initialize limiter with IP-based key function
+# Note: We don't set default_limits to avoid affecting all users if one IP is attacked.
+# Each endpoint should have an explicit rate limit based on its sensitivity.
+# Rate limits automatically expire after the time window - IPs are not permanently blocked.
+limiter = Limiter(
+    key_func=get_ip_key,
+    default_limits=[],  # No global default - each endpoint must have explicit limits
+    storage_uri="memory://",  # In-memory storage (can be changed to Redis later)
+)
+
+
+# Rate limit decorator for IP-based limiting
+def rate_limit_per_ip(limit: str) -> Callable:
+    """Rate limit based on IP address."""
+    return limiter.limit(limit, key_func=get_ip_key)
+
+
+def _get_storage_dict(storage) -> dict | None:
+    """Get the internal storage dictionary from slowapi's memory storage."""
+    if hasattr(storage, "_storage") and isinstance(storage._storage, dict):
+        return storage._storage
+    elif hasattr(storage, "storage") and isinstance(storage.storage, dict):
+        return storage.storage
+    return None
+
+
+def reset_all_rate_limits() -> int:
+    """
+    Reset all rate limits by clearing the storage.
+    This should be called on startup to ensure a clean state.
+    Returns the number of entries cleared.
+    """
+    try:
+        # Access the private _storage attribute
+        storage = limiter._storage
+        storage_dict = _get_storage_dict(storage)
+        
+        if storage_dict is None:
+            # Try using the storage's reset method if available
+            if hasattr(storage, "reset"):
+                try:
+                    # Try reset() with no args first (clears all)
+                    storage.reset()
+                    logger.info("Reset all rate limits on startup using storage.reset()")
+                    return 1  # Assume it worked
+                except TypeError:
+                    # reset() might require arguments, try clearing differently
+                    try:
+                        # Some storage backends need explicit clearing
+                        if hasattr(storage, "clear"):
+                            storage.clear()
+                            logger.info("Reset all rate limits on startup using storage.clear()")
+                            return 1
+                    except Exception:
+                        pass
+                except Exception:
+                    pass
+            logger.warning("Could not reset rate limits: storage dict not accessible and no reset method")
+            return 0
+        
+        count = len(storage_dict)
+        if count > 0:
+            storage_dict.clear()
+            logger.info(f"Reset all rate limits on startup: cleared {count} entries")
+        return count
+    except Exception as e:
+        logger.warning(f"Failed to reset rate limits on startup: {e}")
+        return 0
+
+
+def reset_rate_limit_for_ip(ip: str) -> bool:
+    """
+    Manually reset rate limit for a specific IP address.
+    This clears all rate limit entries for the given IP.
+    Returns True if any entries were cleared, False otherwise.
+    """
+    if not ip:
+        return False
+    
+    try:
+        # Access the private _storage attribute
+        storage = limiter._storage
+        storage_dict = _get_storage_dict(storage)
+        
+        if storage_dict is None:
+            # Try alternative methods
+            if hasattr(storage, "reset"):
+                try:
+                    storage.reset(ip)
+                    return True
+                except Exception:
+                    pass
+            return False
+        
+        cleared = False
+        # slowapi stores entries with keys like "LIMITER:{ip}:{endpoint}"
+        # We need to find all keys that contain this IP
+        # Also handle cases where IP might be in different positions
+        keys_to_remove = []
+        
+        for key in list(storage_dict.keys()):
+            if isinstance(key, str):
+                # Check multiple patterns:
+                # - "LIMITER:{ip}:{endpoint}"
+                # - Keys containing the IP anywhere
+                # - Keys starting with the IP
+                if (key.startswith(f"LIMITER:{ip}:") or 
+                    key.startswith(f"LIMITER:{ip}") or
+                    f":{ip}:" in key or
+                    key.endswith(f":{ip}") or
+                    (ip in key and "LIMITER" in key)):
+                    keys_to_remove.append(key)
+        
+        for key in keys_to_remove:
+            try:
+                del storage_dict[key]
+                cleared = True
+                logger.info(f"Cleared rate limit key: {key}")
+            except KeyError:
+                pass
+        
+        if cleared:
+            logger.info(f"Successfully cleared rate limits for IP: {ip}")
+        else:
+            logger.warning(f"No rate limit entries found for IP: {ip}")
+        
+        return cleared
+    except Exception as e:
+        logger.warning(f"Failed to reset rate limit for IP {ip}: {e}")
+        return False
+
+
+def clear_all_rate_limits() -> int:
+    """
+    Clear all rate limit entries. Use with caution - this affects all IPs.
+    Returns the number of entries cleared.
+    """
+    try:
+        # Access the private _storage attribute
+        storage = limiter._storage
+        storage_dict = _get_storage_dict(storage)
+        
+        if storage_dict is None:
+            return 0
+        
+        count = len(storage_dict)
+        storage_dict.clear()
+        logger.warning(f"Cleared all {count} rate limit entries")
+        return count
+    except Exception as e:
+        logger.error(f"Failed to clear all rate limits: {e}")
+        return 0
+
+
+def cleanup_expired_rate_limits() -> int:
+    """
+    Clean up expired rate limit entries from memory storage.
+    This helps prevent rate limits from being stuck indefinitely.
+    Returns the number of entries cleaned up.
+    """
+    try:
+        # Access the private _storage attribute
+        storage = limiter._storage
+        storage_dict = _get_storage_dict(storage)
+        
+        if storage_dict is None:
+            return 0
+        
+        # slowapi's memory storage stores entries as tuples: (count, reset_time)
+        # Entries should expire naturally, but we'll clean up any that are clearly expired
+        now = time.time()
+        cleaned = 0
+        keys_to_remove = []
+        
+        for key, value in storage_dict.items():
+            if isinstance(value, (tuple, list)) and len(value) >= 2:
+                # Check if reset_time has passed (with some buffer)
+                reset_time = value[1] if isinstance(value[1], (int, float)) else 0
+                # Add 60 second buffer to ensure we don't remove active entries
+                if reset_time > 0 and now > (reset_time + 60):
+                    keys_to_remove.append(key)
+            elif isinstance(value, dict):
+                # Some storage formats use dicts with 'expiry' or 'reset' fields
+                expiry = value.get("expiry") or value.get("reset") or value.get("reset_time")
+                if expiry and isinstance(expiry, (int, float)) and now > (expiry + 60):
+                    keys_to_remove.append(key)
+        
+        for key in keys_to_remove:
+            try:
+                del storage_dict[key]
+                cleaned += 1
+            except KeyError:
+                pass
+        
+        if cleaned > 0:
+            logger.info(f"Cleaned up {cleaned} expired rate limit entries")
+        
+        return cleaned
+    except Exception as e:
+        logger.warning(f"Failed to cleanup expired rate limits: {e}")
+        return 0
+
+
+async def start_rate_limit_cleanup_task() -> None:
+    """Start a background task to periodically clean up expired rate limit entries."""
+    while True:
+        try:
+            await asyncio.sleep(300)  # Run every 5 minutes
+            cleanup_expired_rate_limits()
+        except asyncio.CancelledError:
+            break
+        except Exception as e:
+            logger.error(f"Error in rate limit cleanup task: {e}")
+            await asyncio.sleep(60)  # Wait 1 minute before retrying

backend/services/account/Dockerfile

@@ -0,0 +1,11 @@
+# Account Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/routes/account.py /app/backend/routes/account.py
+COPY backend/services/account/main.py /app/backend/services/account/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=account
+
+EXPOSE 8301

backend/services/account/main.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from backend.routes.account import router as account_router
+
+if __name__ == "__main__":
+    app = FastAPI(title="Account Service")
+    app.include_router(account_router, prefix="/account")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))

backend/services/device/Dockerfile

@@ -0,0 +1,11 @@
+# Device Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/routes/devices.py /app/backend/routes/devices.py
+COPY backend/services/device/main.py /app/backend/services/device/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=device
+
+EXPOSE 8301

backend/services/device/main.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from backend.routes.devices import router as device_router
+
+if __name__ == "__main__":
+    app = FastAPI(title="Device Service")
+    app.include_router(device_router, prefix="/devices")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))

backend/services/gateway/Dockerfile

@@ -0,0 +1,14 @@
+# Gateway Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/app.py /app/backend/app.py
+COPY backend/main.py /app/backend/main.py
+COPY backend/dependencies.py /app/backend/dependencies.py
+COPY backend/security /app/backend/security/
+COPY backend/services/gateway/main.py /app/backend/services/gateway/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=gateway
+
+EXPOSE 8301

backend/services/gateway/main.py

@@ -0,0 +1,6 @@
+# Gateway service - runs the main gateway app from backend/app.py
+
+if __name__ == "__main__":
+    from backend.app import app
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8300)))

backend/services/messaging/Dockerfile

@@ -0,0 +1,12 @@
+# Messaging Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/routes/messaging.py /app/backend/routes/messaging.py
+COPY backend/websocket /app/backend/websocket/
+COPY backend/services/messaging/main.py /app/backend/services/messaging/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=messaging
+
+EXPOSE 8301

backend/services/messaging/files/websocket/__init__.py

@@ -0,0 +1,7 @@
+from .registry import WebSocketHandlerRegistry
+
+# Note: handler_registry and websocket_handler are not imported here to avoid circular dependency
+# Import them directly from websocket.handlers when needed
+
+__all__ = ["WebSocketHandlerRegistry"]
+

backend/services/messaging/files/websocket/handlers.py

@@ -0,0 +1,570 @@
+from datetime import datetime
+import json
+import logging
+import time
+from typing import Any
+from fastapi import HTTPException, WebSocket, Request
+from sqlalchemy.orm import Session
+
+from backend.services.messaging.files.websocket.registry import WebSocketHandlerRegistry
+from backend.routes.messaging import (
+    MessaggingSocketManager,
+    _send_message_internal,
+    _edit_message_internal,
+    get_messages,
+    edit_message,
+    delete_message,
+    add_reaction,
+    add_dm_reaction,
+)
+from backend.shared.models import (
+    User,
+    SendMessageRequest,
+    EditMessageRequest,
+    DMEnvelope,
+    ReactionRequest,
+    DMReactionRequest,
+    UpdateLog,
+)
+from backend.security.audit import log_access, log_dm
+
+logger = logging.getLogger("uvicorn.error")
+
+# Create global registry instance
+handler_registry = WebSocketHandlerRegistry()
+
+# Create decorator alias
+websocket_handler = handler_registry.register
+
+
+def log(manager: MessaggingSocketManager, websocket: WebSocket, user: User | None, event: str, **extra: Any) -> None:
+    """Log WebSocket event."""
+    ws_path = getattr(getattr(websocket, "url", None), "path", None)
+    if not ws_path and isinstance(getattr(websocket, "scope", None), dict):
+        ws_path = websocket.scope.get("path")
+    ws_path = ws_path or "unknown"
+    headers = {}
+    if isinstance(getattr(websocket, "scope", None), dict):
+        headers = {k.decode("latin1"): v.decode("latin1") for k, v in websocket.scope.get("headers", [])}
+    xff = headers.get("x-forwarded-for")
+    client_ip = xff.split(",")[0].strip() if xff else (websocket.client.host if websocket.client else None)
+    
+    log_access(
+        "ws_event",
+        path=ws_path,
+        event=event,
+        user=user.username if user else None,
+        user_id=user.id if user else None,
+        ip=client_ip,
+        **extra,
+    )
+
+
+@websocket_handler("getUpdates", authRequired=True)
+async def getUpdates(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Handle gap detection - client requests updates from a specific sequence number."""
+    last_seq = data.get("lastSeq", 0)
+    manager.last_seq_by_ws[websocket] = last_seq
+    current_seq = manager.sequence_numbers.get(user.id, 0)
+    
+    # Query database for missed updates
+    missed_updates = []
+    if last_seq > 0 and last_seq < current_seq:
+        try:
+            # Get all updates between last_seq and current_seq
+            update_logs = db.query(UpdateLog).filter(
+                UpdateLog.user_id == user.id,
+                UpdateLog.sequence > last_seq,
+                UpdateLog.sequence <= current_seq
+            ).order_by(UpdateLog.sequence.asc()).all()
+            
+            # Each log entry contains a batch of updates with the same sequence number
+            for log_entry in update_logs:
+                updates = json.loads(log_entry.updates)
+                missed_updates.append({
+                    "seq": log_entry.sequence,
+                    "updates": updates
+                })
+        except Exception as e:
+            logger.error(f"Failed to retrieve missed updates: {e}")
+    
+    # Send missed updates directly (not through return value)
+    for batch in missed_updates:
+        await websocket.send_json({
+            "type": "updates",
+            "seq": batch["seq"],
+            "updates": batch["updates"]
+        })
+    
+    # Update the websocket's last sequence tracking
+    manager.last_seq_by_ws[websocket] = current_seq
+    log(manager, websocket, user, "getUpdates", last_seq=last_seq, current_seq=current_seq, missed_count=len(missed_updates))
+    
+    return {
+        "status": "ok",
+        "lastSeq": current_seq,
+        "missedCount": len(missed_updates)
+    }
+
+
+@websocket_handler("ping", authRequired=True)
+async def ping(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Handle ping - authenticate and set user online."""
+    # Set user online in DB
+    user.online = True
+    user.last_seen = datetime.now()
+    db.commit()
+    # Add to online users
+    manager.online_users.add(user.id)
+    # Broadcast status change
+    await manager.broadcast_status_change(user.id, True, user.last_seen.isoformat(), db)
+    
+    log(manager, websocket, user, "ping")
+    return {"status": "success"}
+
+
+@websocket_handler("getMessages", authRequired=True)
+async def getMessages(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Get all public chat messages."""
+    result = await get_messages(user, db)
+    log(manager, websocket, user, "getMessages")
+    return result
+
+
+@websocket_handler("sendMessage", authRequired=True)
+async def sendMessage(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Send a public chat message."""
+    message_request: SendMessageRequest = SendMessageRequest.model_validate(data)
+    
+    # Call internal function directly (rate limiting is handled at infrastructure level via Caddy)
+    response = await _send_message_internal(message_request, user, db, [])
+    await manager.broadcast({
+        "type": "newMessage",
+        "data": response["message"]
+    }, db)
+    
+    log(manager, websocket, user, "sendMessage", message_id=response["message"]["id"])
+    return response
+
+
+@websocket_handler("dmSend", authRequired=True)
+async def dmSend(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Send a direct message."""
+    payload = data
+    required = ["recipientId", "iv", "ciphertext", "salt", "iv2", "wrappedMk"]
+    for key in required:
+        if key not in payload:
+            raise HTTPException(status_code=400, detail=f"Missing {key}")
+    
+    env = DMEnvelope(
+        sender_id=user.id,
+        recipient_id=int(payload["recipientId"]),
+        iv_b64=payload["iv"],
+        ciphertext_b64=payload["ciphertext"],
+        salt_b64=payload["salt"],
+        iv2_b64=payload["iv2"],
+        wrapped_mk_b64=payload["wrappedMk"],
+        reply_to_id=payload.get("replyToId") if isinstance(payload.get("replyToId"), int) else None,
+    )
+    db.add(env)
+    db.commit()
+    db.refresh(env)
+    
+    payload_ws = {
+        "type": "dmNew",
+        "data": {
+            "id": env.id,
+            "senderId": env.sender_id,
+            "recipientId": env.recipient_id,
+            "iv": env.iv_b64,
+            "ciphertext": env.ciphertext_b64,
+            "salt": env.salt_b64,
+            "iv2": env.iv2_b64,
+            "wrappedMk": env.wrapped_mk_b64,
+            "timestamp": env.timestamp.isoformat(),
+            "replyToId": env.reply_to_id,
+        }
+    }
+    
+    # Send push notification for DM
+    try:
+        from push_service import push_service
+        await push_service.send_dm_notification(db, env, user)
+    except Exception as e:
+        logger.error(f"Failed to send push notification for DM {env.id}: {e}")
+    
+    await manager.send_update_to_user(env.recipient_id, "dmNew", payload_ws["data"], db)
+    await manager.send_update_to_user(env.sender_id, "dmNew", payload_ws["data"], db)
+    
+    log(manager, websocket, user, "dmSend", dm_envelope_id=env.id, recipient_id=env.recipient_id)
+    log_dm(
+        "message_sent_ws",
+        dm_envelope_id=env.id,
+        sender_id=user.id,
+        sender_username=user.username,
+        recipient_id=env.recipient_id,
+        reply_to=env.reply_to_id,
+    )
+    
+    return {"status": "ok", "id": env.id}
+
+
+@websocket_handler("editMessage", authRequired=True)
+async def editMessage(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Edit a public chat message."""
+    
+    message_id = data["message_id"]
+    edit_request: EditMessageRequest = EditMessageRequest.model_validate(data)
+    
+    response = await _edit_message_internal(message_id, edit_request, user, db)
+    await manager.broadcast({
+        "type": "messageEdited",
+        "data": response["message"]
+    }, db)
+    
+    log(manager, websocket, user, "editMessage", message_id=message_id)
+    return response
+
+
+@websocket_handler("dmEdit", authRequired=True)
+async def dmEdit(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Edit a direct message."""
+    payload = data
+    env_id = int(payload["id"])
+    env: DMEnvelope | None = db.query(DMEnvelope).filter(DMEnvelope.id == env_id).first()
+    if not env:
+        raise HTTPException(status_code=404, detail="DM not found")
+    if env.sender_id != user.id:
+        raise HTTPException(status_code=403, detail="You can only edit your own messages")
+    
+    # Replace ciphertext and iv
+    env.iv_b64 = payload["iv"]
+    env.ciphertext_b64 = payload["ciphertext"]
+    env.iv2_b64 = payload["iv2"]
+    env.wrapped_mk_b64 = payload["wrappedMk"]
+    env.salt_b64 = payload["salt"]
+    db.commit()
+    db.refresh(env)
+    
+    payload_ws = {
+        "type": "dmEdited",
+        "data": {
+            "id": env.id,
+            "senderId": env.sender_id,
+            "recipientId": env.recipient_id,
+            "iv": env.iv_b64,
+            "ciphertext": env.ciphertext_b64,
+            "iv2": env.iv2_b64,
+            "wrappedMk": env.wrapped_mk_b64,
+            "salt": env.salt_b64,
+            "timestamp": env.timestamp.isoformat(),
+        }
+    }
+    await manager.send_update_to_user(env.recipient_id, "dmEdited", payload_ws["data"], db)
+    await manager.send_update_to_user(env.sender_id, "dmEdited", payload_ws["data"], db)
+    
+    log(manager, websocket, user, "dmEdit", dm_envelope_id=env.id)
+    log_dm(
+        "message_edited",
+        dm_envelope_id=env.id,
+        user_id=user.id,
+        username=user.username,
+    )
+    
+    return {"status": "ok", "id": env.id}
+
+
+@websocket_handler("dmDelete", authRequired=True)
+async def dmDelete(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Delete a direct message."""
+    payload = data
+    env_id = int(payload["id"])
+    env: DMEnvelope | None = db.query(DMEnvelope).filter(DMEnvelope.id == env_id).first()
+    if not env:
+        raise HTTPException(status_code=404, detail="DM not found")
+    if env.sender_id != user.id:
+        raise HTTPException(status_code=403, detail="You can only delete your own messages")
+    
+    db.delete(env)
+    db.commit()
+    
+    payload_ws = {
+        "type": "dmDeleted",
+        "data": {
+            "id": env_id,
+            "senderId": user.id,
+            "recipientId": payload.get("recipientId")
+        }
+    }
+    await manager.send_update_to_user(env.recipient_id, "dmDeleted", payload_ws["data"], db)
+    await manager.send_update_to_user(env.sender_id, "dmDeleted", payload_ws["data"], db)
+    
+    log(manager, websocket, user, "dmDelete", dm_envelope_id=env_id)
+    log_dm(
+        "message_deleted",
+        dm_envelope_id=env_id,
+        user_id=user.id,
+        username=user.username,
+        recipient_id=env.recipient_id,
+    )
+    
+    return {"status": "ok", "id": env_id}
+
+
+@websocket_handler("deleteMessage", authRequired=True)
+async def deleteMessage(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Delete a public chat message."""
+    message_id = data["message_id"]
+    response = await delete_message(message_id, user, db)
+    await manager.broadcast({
+        "type": "messageDeleted",
+        "data": {"message_id": message_id}
+    }, db)
+    
+    log(manager, websocket, user, "deleteMessage", message_id=message_id)
+    return response
+
+
+@websocket_handler("addReaction", authRequired=True)
+async def addReaction(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Add or remove a reaction to a public chat message."""
+    reaction_request = ReactionRequest(
+        message_id=data["message_id"],
+        emoji=data["emoji"]
+    )
+    
+    response = await add_reaction(reaction_request, user, db)
+    
+    # Broadcast reaction update
+    await manager.broadcast({
+        "type": "reactionUpdate",
+        "data": {
+            "message_id": data["message_id"],
+            "emoji": data["emoji"],
+            "action": response["action"],
+            "user_id": user.id,
+            "username": user.username,
+            "reactions": response["reactions"]
+        }
+    }, db)
+    
+    log(manager, websocket, user, "addReaction", message_id=data["message_id"], emoji=data["emoji"], action=response["action"])
+    return response
+
+
+@websocket_handler("addDmReaction", authRequired=True)
+async def addDmReaction(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Add or remove a reaction to a direct message."""
+    reaction_request = DMReactionRequest(
+        dm_envelope_id=data["dm_envelope_id"],
+        emoji=data["emoji"]
+    )
+    
+    response = await add_dm_reaction(reaction_request, user, db)
+    
+    # Broadcast reaction update
+    await manager.broadcast({
+        "type": "dmReactionUpdate",
+        "data": {
+            "dm_envelope_id": data["dm_envelope_id"],
+            "emoji": data["emoji"],
+            "action": response["action"],
+            "user_id": user.id,
+            "username": user.username,
+            "reactions": response["reactions"]
+        }
+    }, db)
+    
+    log(manager, websocket, user, "addDmReaction", dm_envelope_id=data["dm_envelope_id"], emoji=data["emoji"], action=response["action"])
+    return response
+
+
+@websocket_handler("call_signaling", authRequired=True)
+async def call_signaling(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Forward WebRTC signaling between peers."""
+    payload = data or {}
+    to_user_id = int(payload.get("toUserId") or 0)
+    if not to_user_id:
+        raise HTTPException(status_code=400, detail="Missing toUserId")
+    
+    # Ensure sender is set by the server
+    payload["fromUserId"] = user.id
+    payload["fromUsername"] = user.username
+    
+    await manager.send_to_user(to_user_id, {
+        "type": "call_signaling",
+        "data": payload
+    })
+    
+    log(manager, websocket, user, "call_signaling", to_user_id=to_user_id)
+    return {"status": "ok"}
+
+
+@websocket_handler("call_video_toggle", authRequired=True)
+async def call_video_toggle(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Forward video toggle state between peers."""
+    payload = data or {}
+    to_user_id = int(payload.get("toUserId") or 0)
+    if not to_user_id:
+        raise HTTPException(status_code=400, detail="Missing toUserId")
+    
+    await manager.send_update_to_user(to_user_id, "call_signaling", {
+        "type": "call_video_toggle",
+        "fromUserId": user.id,
+        "toUserId": to_user_id,
+        "data": {"enabled": payload.get("enabled", False)}
+    }, db)
+    
+    log(manager, websocket, user, "call_video_toggle", to_user_id=to_user_id, enabled=payload.get("enabled", False))
+    return {"status": "ok"}
+
+
+@websocket_handler("call_screen_share_toggle", authRequired=True)
+async def call_screen_share_toggle(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Forward screen share toggle state between peers."""
+    payload = data or {}
+    to_user_id = int(payload.get("toUserId") or 0)
+    if not to_user_id:
+        raise HTTPException(status_code=400, detail="Missing toUserId")
+    
+    await manager.send_update_to_user(to_user_id, "call_signaling", {
+        "type": "call_screen_share_toggle",
+        "fromUserId": user.id,
+        "toUserId": to_user_id,
+        "data": {"enabled": payload.get("enabled", False)}
+    }, db)
+    
+    log(manager, websocket, user, "call_screen_share_toggle", to_user_id=to_user_id, enabled=payload.get("enabled", False))
+    return {"status": "ok"}
+
+
+@websocket_handler("subscribeStatus", authRequired=True)
+async def subscribeStatus(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Subscribe to status updates for a user."""
+    user_id_to_subscribe = int(data["userId"])
+    manager.ws_subscriptions[websocket].add(user_id_to_subscribe)
+    
+    # Get current status of the user
+    target_user = db.query(User).filter(User.id == user_id_to_subscribe).first()
+    if target_user:
+        # Send current status directly (not through return value)
+        await websocket.send_json({
+            "type": "statusUpdate",
+            "data": {
+                "userId": user_id_to_subscribe,
+                "online": target_user.online,
+                "lastSeen": target_user.last_seen.isoformat() if target_user.last_seen else None
+            }
+        })
+        log(manager, websocket, user, "subscribeStatus", target_user_id=user_id_to_subscribe)
+        return {"status": "ok"}
+    else:
+        log(manager, websocket, user, "subscribeStatus_error", target_user_id=user_id_to_subscribe, error="User not found")
+        raise HTTPException(status_code=404, detail="User not found")
+
+
+@websocket_handler("unsubscribeStatus", authRequired=True)
+async def unsubscribeStatus(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> dict | None:
+    """Unsubscribe from status updates for a user."""
+    user_id_to_unsubscribe = int(data["userId"])
+    manager.ws_subscriptions[websocket].discard(user_id_to_unsubscribe)
+    
+    log(manager, websocket, user, "unsubscribeStatus", target_user_id=user_id_to_unsubscribe)
+    return {"status": "ok"}
+
+
+@websocket_handler("typing", authRequired=True)
+async def typing(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> None:
+    """Handle typing indicator start for public chat."""
+    was_typing = manager.typing_state.get(user.id, False)
+    manager.typing_users[user.id] = time.time()
+    
+    # Only send update if state changed (started typing)
+    if not was_typing:
+        manager.typing_state[user.id] = True
+        # Broadcast to all connected users
+        await manager.broadcast({
+            "type": "typing",
+            "data": {
+                "userId": user.id,
+                "username": user.username
+            }
+        }, db)
+    
+    # No confirmation response - privacy protection
+
+
+@websocket_handler("stopTyping", authRequired=True)
+async def stopTyping(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> None:
+    """Handle typing indicator stop for public chat."""
+    was_typing = manager.typing_state.get(user.id, False)
+    if user.id in manager.typing_users:
+        del manager.typing_users[user.id]
+    
+    # Only send update if state changed (stopped typing)
+    if was_typing:
+        manager.typing_state[user.id] = False
+        # Broadcast to all connected users
+        await manager.broadcast({
+            "type": "stopTyping",
+            "data": {
+                "userId": user.id,
+                "username": user.username
+            }
+        }, db)
+    
+    # No confirmation response - privacy protection
+    log(manager, websocket, user, "stopTyping")
+
+
+@websocket_handler("dmTyping", authRequired=True)
+async def dmTyping(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> None:
+    """Handle typing indicator start for DM."""
+    recipient_id = int(data["recipientId"])
+    
+    if user.id not in manager.dm_typing_users:
+        manager.dm_typing_users[user.id] = {}
+    if user.id not in manager.dm_typing_state:
+        manager.dm_typing_state[user.id] = {}
+    
+    was_typing = manager.dm_typing_state[user.id].get(recipient_id, False)
+    manager.dm_typing_users[user.id][recipient_id] = time.time()
+    
+    # Only send update if state changed (started typing)
+    if not was_typing:
+        manager.dm_typing_state[user.id][recipient_id] = True
+        # Send only to recipient
+        await manager.send_update_to_user(recipient_id, "dmTyping", {
+            "userId": user.id,
+            "username": user.username
+        }, db)
+    
+    # No confirmation response - privacy protection
+
+
+@websocket_handler("stopDmTyping", authRequired=True)
+async def stopDmTyping(manager: MessaggingSocketManager, websocket: WebSocket, db: Session, user: User, data: dict) -> None:
+    """Handle typing indicator stop for DM."""
+    recipient_id = int(data["recipientId"])
+    
+    was_typing = False
+    if user.id in manager.dm_typing_state:
+        was_typing = manager.dm_typing_state[user.id].get(recipient_id, False)
+    
+    if user.id in manager.dm_typing_users and recipient_id in manager.dm_typing_users[user.id]:
+        del manager.dm_typing_users[user.id][recipient_id]
+        if not manager.dm_typing_users[user.id]:
+            del manager.dm_typing_users[user.id]
+    
+    # Only send update if state changed (stopped typing)
+    if was_typing:
+        if user.id in manager.dm_typing_state:
+            manager.dm_typing_state[user.id][recipient_id] = False
+        # Send only to recipient
+        await manager.send_update_to_user(recipient_id, "stopDmTyping", {
+            "userId": user.id,
+            "username": user.username
+        }, db)
+    
+    # No confirmation response - privacy protection
+

backend/services/messaging/files/websocket/registry.py

@@ -0,0 +1,33 @@
+from typing import Callable
+
+
+class WebSocketHandlerRegistry:
+    """Registry for WebSocket message handlers with authentication support."""
+    
+    def __init__(self):
+        self._handlers: dict[str, tuple[Callable, bool]] = {}
+    
+    def register(self, message_type: str, authRequired: bool = True):
+        """Register a handler for a message type.
+        
+        Args:
+            message_type: The WebSocket message type to handle
+            authRequired: If True, handler will receive authenticated User (not None) or raise 401
+        """
+        def decorator(func: Callable):
+            self._handlers[message_type] = (func, authRequired)
+            return func
+        return decorator
+    
+    def get_handler(self, message_type: str) -> tuple[Callable, bool] | None:
+        """Get handler and authRequired flag for a message type.
+        
+        Returns:
+            Tuple of (handler function, authRequired flag) or None if not found
+        """
+        return self._handlers.get(message_type)
+    
+    def get_all_types(self) -> list[str]:
+        """Get all registered message types for debugging/logging."""
+        return list(self._handlers.keys())
+

backend/services/messaging/files/websocket/utils.py

@@ -0,0 +1,92 @@
+from fastapi import HTTPException
+from fastapi.security import HTTPAuthorizationCredentials
+from sqlalchemy.orm import Session
+from types import SimpleNamespace
+from backend.shared.dependencies import get_current_user
+from backend.shared.models import User
+
+
+def extract_token_from_data(data: dict) -> str | None:
+    """Extract authentication token from WebSocket message data.
+    
+    Args:
+        data: WebSocket message data dictionary
+        
+    Returns:
+        Token string or None if not present
+    """
+    credentials = data.get("credentials")
+    if credentials and isinstance(credentials, dict):
+        return credentials.get("credentials")
+    return None
+
+
+def get_current_user_from_token(token: str, db: Session) -> User | None:
+    """Get user from authentication token.
+    
+    Args:
+        token: JWT token string
+        db: Database session
+        
+    Returns:
+        User object or None if token is invalid
+    """
+    try:
+        # Ensure session is in a usable state before querying
+        try:
+            db.rollback()
+        except Exception:
+            pass
+        
+        dummy_request = SimpleNamespace()
+        dummy_request.state = SimpleNamespace()
+        
+        try:
+            from fastapi.security import HTTPBearer
+            security = HTTPBearer()
+            # We need to create credentials manually
+            credentials = HTTPAuthorizationCredentials(
+                scheme="Bearer",
+                credentials=token
+            )
+            return get_current_user(dummy_request, credentials, db)
+        except HTTPException:
+            return None
+    except Exception:
+        try:
+            db.rollback()
+        except Exception:
+            pass
+        return None
+
+
+def authenticate_user(data: dict, db: Session, authRequired: bool) -> User | None:
+    """Authenticate user from WebSocket message data.
+    
+    Args:
+        data: WebSocket message data dictionary
+        db: Database session
+        authRequired: If True, raises 401 on missing/invalid token
+        
+    Returns:
+        User object (guaranteed not None if authRequired=True) or None
+        
+    Raises:
+        HTTPException: 401 if authRequired=True and token is missing/invalid
+    """
+    token = extract_token_from_data(data)
+    
+    if authRequired:
+        if not token:
+            raise HTTPException(status_code=401, detail="Missing credentials")
+        
+        user = get_current_user_from_token(token, db)
+        if not user:
+            raise HTTPException(status_code=401, detail="Invalid credentials")
+        
+        return user
+    else:
+        if token:
+            return get_current_user_from_token(token, db)
+        return None
+

backend/services/messaging/main.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from backend.routes.messaging import router as messaging_router
+
+if __name__ == "__main__":
+    app = FastAPI(title="Messaging Service")
+    app.include_router(messaging_router, prefix="/messaging")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))

backend/services/migration_runner/Dockerfile

@@ -0,0 +1,15 @@
+# Migration Runner Dockerfile
+FROM backend/base:latest
+
+# Copy migration files
+COPY backend/alembic /app/backend/alembic/
+COPY backend/migration.py /app/backend/migration.py
+
+# Copy migration runner
+COPY backend/services/migration_runner/main.py /app/backend/services/migration_runner/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=migration_runner
+
+# Override entrypoint to run migrations
+ENTRYPOINT ["python", "-m", "backend.services.migration_runner.main"]

backend/services/migration_runner/main.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+"""
+Migration runner service - executes database migrations and exits.
+This service runs Alembic migrations against PostgreSQL and terminates.
+"""
+
+import os
+import sys
+from pathlib import Path
+from alembic import command
+from alembic.config import Config
+
+def run_migrations():
+    """Run Alembic migrations."""
+    print("Starting database migrations...")
+
+    # Change to backend directory to run migrations
+    backend_dir = Path(__file__).parent.parent.parent
+    os.chdir(backend_dir)
+
+    # Ensure shared models are imported for alembic
+    import backend.shared.models
+
+    # Set DATABASE_URL from environment if not set
+    db_url = os.getenv("DATABASE_URL")
+    if not db_url:
+        print("ERROR: DATABASE_URL environment variable not set")
+        sys.exit(1)
+
+    # Export DATABASE_URL for alembic
+    os.environ["DATABASE_URL"] = db_url
+
+    try:
+        # Use the robust migration system from migration.py
+        # This handles all edge cases and recovery scenarios automatically
+        print("Starting database migrations...")
+
+        # Import and run the migration function
+        from backend.migration import run_migrations
+        run_migrations()
+
+        print("Database migrations completed successfully!")
+
+    except Exception as e:
+        print(f"ERROR: Failed to run migrations: {e}")
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)
+
+if __name__ == "__main__":
+    run_migrations()

backend/services/moderation/Dockerfile

@@ -0,0 +1,13 @@
+# Moderation Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/routes/moderation.py /app/backend/routes/moderation.py
+COPY backend/security/profanity.py /app/backend/security/profanity.py
+COPY backend/similarity.py /app/backend/similarity.py
+COPY backend/services/moderation/main.py /app/backend/services/moderation/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=moderation
+
+EXPOSE 8301

backend/services/moderation/main.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from backend.routes.moderation import router as moderation_router
+
+if __name__ == "__main__":
+    app = FastAPI(title="Moderation Service")
+    app.include_router(moderation_router, prefix="/moderation")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))

backend/services/profile/Dockerfile

@@ -0,0 +1,11 @@
+# Profile Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/routes/profile.py /app/backend/routes/profile.py
+COPY backend/services/profile/main.py /app/backend/services/profile/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=profile
+
+EXPOSE 8301

backend/services/profile/main.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from backend.routes.profile import router as profile_router
+
+if __name__ == "__main__":
+    app = FastAPI(title="Profile Service")
+    app.include_router(profile_router, prefix="/profile")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))

backend/services/push/Dockerfile

@@ -0,0 +1,12 @@
+# Push Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/routes/push.py /app/backend/routes/push.py
+COPY backend/push_service.py /app/backend/push_service.py
+COPY backend/services/push/main.py /app/backend/services/push/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=push
+
+EXPOSE 8301

backend/services/push/files/push_service.py

@@ -0,0 +1,243 @@
+import json
+import logging
+import os
+from typing import List, Optional
+from sqlalchemy.orm import Session
+from pywebpush import webpush, WebPushException
+from backend.shared.models import PushSubscription, User, Message, DMEnvelope, FcmToken
+import firebase_admin
+from firebase_admin import credentials as firebase_credentials
+from firebase_admin import messaging as firebase_messaging
+import base64
+
+logger = logging.getLogger("uvicorn.error")
+
+class PushNotificationService:
+    def __init__(self):
+        self.vapid_private_key = os.getenv("VAPID_PRIVATE_KEY")
+        self.vapid_public_key = os.getenv("VAPID_PUBLIC_KEY")
+        # Firebase Admin initialization (modern API). Only FIREBASE_CERT env is supported.
+        self.firebase_initialized = False
+        try:
+            firebase_cert = os.getenv("FIREBASE_CERT")
+            if not firebase_cert:
+                raise RuntimeError("FIREBASE_CERT env variable is required for Firebase Admin SDK initialization")
+
+            # Support raw JSON or base64-encoded JSON in FIREBASE_CERT
+            decoded = base64.b64decode(firebase_cert).decode("utf-8")
+            sa_dict = json.loads(decoded)
+
+            cred = firebase_credentials.Certificate(sa_dict)
+            firebase_admin.initialize_app(cred)
+            self.firebase_initialized = True
+            logger.info("Firebase Admin SDK initialized for push sending (FIREBASE_CERT)")
+        except Exception as e:
+            logger.error(f"Failed to initialize Firebase Admin SDK from FIREBASE_CERT: {e}")
+            raise
+
+        if (not self.vapid_public_key) or (not self.vapid_private_key):
+            raise ValueError("VAPID public or private key is None")
+
+        self.vapid_claims = {
+            "sub": "mailto:support@fromchat.ru",
+            "aud": "https://fcm.googleapis.com"
+        }
+
+    async def subscribe_user(self, db: Session, user_id: int, endpoint: str, p256dh_key: str, auth_key: str) -> bool:
+        """Subscribe a user to push notifications"""
+        try:
+            # Check if user already has a subscription
+            existing_sub = db.query(PushSubscription).filter(PushSubscription.user_id == user_id).first()
+            
+            if existing_sub:
+                # Update existing subscription
+                existing_sub.endpoint = endpoint
+                existing_sub.p256dh_key = p256dh_key
+                existing_sub.auth_key = auth_key
+            else:
+                # Create new subscription
+                new_sub = PushSubscription(
+                    user_id=user_id,
+                    endpoint=endpoint,
+                    p256dh_key=p256dh_key,
+                    auth_key=auth_key
+                )
+                db.add(new_sub)
+            
+            db.commit()
+            logger.info(f"Push subscription saved for user {user_id}")
+            return True
+        except Exception as e:
+            logger.error(f"Failed to save push subscription for user {user_id}: {e}")
+            db.rollback()
+            return False
+
+    async def send_public_message_notification(self, db: Session, message: Message, exclude_user_id: Optional[int] = None):
+        """Send push notification for a new public chat message"""
+        try:
+            # Get all users except the sender
+            users = db.query(User).filter(User.id != message.user_id)
+            if exclude_user_id:
+                users = users.filter(User.id != exclude_user_id)
+
+            for user in users:
+                # Check if user has push subscription before trying to send
+                # Try all FCM tokens first (Android). If none or all fail, fall back to web push subscription.
+                fcm_rows = db.query(FcmToken).filter(FcmToken.user_id == user.id).all()
+                payload_data = {
+                    "type": "public_message",
+                    "message_id": message.id,
+                    "sender_id": message.user_id,
+                    "sender_username": message.author.username
+                }
+                title = f"{message.author.username}"
+                body = message.content[:100] + ("..." if len(message.content) > 100 else "")
+
+                if fcm_rows and self.firebase_initialized:
+                    for fcm in fcm_rows:
+                        try:
+                            self._send_fcm_to_token(fcm.token, title, body, payload_data)
+                        except Exception as e:
+                            logger.error(f"Failed to send FCM to user {user.id} token {fcm.token}: {e}")
+                            # Check if this is a permanent failure and clean up the token
+                            self._cleanup_failed_fcm_token(db, fcm, str(e))
+
+                subscription = db.query(PushSubscription).filter(PushSubscription.user_id == user.id).first()
+                if subscription:
+                    await self._send_notification_to_user(
+                        db, user.id, title, body, message.author.profile_picture, payload_data
+                    )
+        except Exception as e:
+            logger.error(f"Failed to send public message notifications: {e}")
+
+    async def send_dm_notification(self, db: Session, dm_envelope: DMEnvelope, sender: User):
+        """Send push notification for a new DM"""
+        try:
+            title = f"{sender.username}"
+            body = "New direct message"
+            payload_data = {
+                "type": "dm",
+                "dm_id": dm_envelope.id,
+                "sender_id": sender.id,
+                "sender_username": sender.username
+            }
+
+            fcm_rows = db.query(FcmToken).filter(FcmToken.user_id == dm_envelope.recipient_id).all()
+            if fcm_rows and self.firebase_initialized:
+                for fcm in fcm_rows:
+                    try:
+                        self._send_fcm_to_token(fcm.token, title, body, payload_data)
+                    except Exception as e:
+                        logger.error(f"Failed to send FCM to user {dm_envelope.recipient_id} token {fcm.token}: {e}")
+                        # Check if this is a permanent failure and clean up the token
+                        self._cleanup_failed_fcm_token(db, fcm, str(e))
+
+            await self._send_notification_to_user(
+                db, dm_envelope.recipient_id, title, body, sender.profile_picture, payload_data
+            )
+        except Exception as e:
+            logger.error(f"Failed to send DM notification: {e}")
+
+    async def _send_notification_to_user(self, db: Session, user_id: int, title: str, body: str, icon: Optional[str], data: dict):
+        """Send a push notification to a specific user"""
+        try:
+            subscription = db.query(PushSubscription).filter(PushSubscription.user_id == user_id).first()
+            if not subscription:
+                return
+
+            payload = {
+                "title": title,
+                "body": body,
+                "icon": icon or "about:blank",
+                "tag": f"message_{user_id}",
+                "data": data
+            }
+
+            subscription_info = {
+                "endpoint": subscription.endpoint,
+                "keys": {
+                    "p256dh": subscription.p256dh_key,
+                    "auth": subscription.auth_key
+                }
+            }
+
+            webpush(
+                subscription_info=subscription_info,
+                data=json.dumps(payload),
+                vapid_private_key=self.vapid_private_key,
+                vapid_claims=self.vapid_claims
+            )
+            
+        except WebPushException as e:
+            logger.error(f"WebPush error for user {user_id}: {e}")
+            # If the subscription is invalid, remove it
+            if hasattr(e, 'response') and e.response and e.response.status_code in [410, 404]:
+                db.query(PushSubscription).filter(PushSubscription.user_id == user_id).delete()
+                db.commit()
+        except Exception as e:
+            logger.error(f"Failed to send push notification to user {user_id}: {e}")
+
+    def _send_fcm_to_token(self, token: str, title: str, body: str, data: dict):
+        """Send an FCM data-only push to a single device token using Firebase Admin SDK.
+        Notification display is handled by the app, not FCM."""
+        if not self.firebase_initialized:
+            raise RuntimeError("Firebase Admin SDK not initialized (FIREBASE_CERT required)")
+
+        try:
+            # Send only data payload - let the app handle notification display
+            # This prevents FCM from auto-showing notifications
+            msg = firebase_messaging.Message(
+                token=token,
+                data={
+                    "title": title,
+                    "body": body,
+                    **{k: str(v) for k, v in (data or {}).items()}
+                },
+                android=firebase_messaging.AndroidConfig(priority="high"),
+                apns=firebase_messaging.APNSConfig(headers={"apns-priority": "10"})
+            )
+            resp = firebase_messaging.send(msg)
+            return resp
+        except Exception as e:
+            logger.error(f"Firebase Admin send failed for token {token}: {e}")
+            raise
+
+    def _cleanup_failed_fcm_token(self, db: Session, fcm_token_entry, error_message: str):
+        """Clean up FCM tokens that have permanent failures"""
+        try:
+            # Check for permanent failure indicators in the error message
+            permanent_errors = [
+                "unregistered", "invalidregistration", "notregistered",
+                "sender_id_mismatch", "invalid_argument"
+            ]
+
+            error_lower = error_message.lower()
+            is_permanent = any(permanent_error in error_lower for permanent_error in permanent_errors)
+
+            if is_permanent:
+                logger.info(f"Removing permanently failed FCM token for user {fcm_token_entry.user_id}: {fcm_token_entry.token}")
+                db.query(FcmToken).filter(FcmToken.id == fcm_token_entry.id).delete()
+                db.commit()
+            else:
+                logger.debug(f"Temporary FCM failure for token {fcm_token_entry.token}, keeping token: {error_message}")
+        except Exception as e:
+            logger.error(f"Failed to cleanup FCM token {fcm_token_entry.token}: {e}")
+            try:
+                db.rollback()
+            except Exception:
+                pass
+
+    async def unsubscribe_user(self, db: Session, user_id: int) -> bool:
+        """Unsubscribe a user from push notifications"""
+        try:
+            db.query(PushSubscription).filter(PushSubscription.user_id == user_id).delete()
+            db.commit()
+            logger.info(f"Push subscription removed for user {user_id}")
+            return True
+        except Exception as e:
+            logger.error(f"Failed to remove push subscription for user {user_id}: {e}")
+            db.rollback()
+            return False
+
+# Global instance
+push_service = PushNotificationService()

backend/services/push/main.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from backend.routes.push import router as push_router
+
+if __name__ == "__main__":
+    app = FastAPI(title="Push Service")
+    app.include_router(push_router, prefix="/push")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))

backend/services/webrtc/Dockerfile

@@ -0,0 +1,11 @@
+# WebRTC Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/routes/webrtc.py /app/backend/routes/webrtc.py
+COPY backend/services/webrtc/main.py /app/backend/services/webrtc/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=webrtc
+
+EXPOSE 8301

backend/services/webrtc/main.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from backend.routes.webrtc import router as webrtc_router
+
+if __name__ == "__main__":
+    app = FastAPI(title="WebRTC Service")
+    app.include_router(webrtc_router, prefix="/webrtc")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))

backend/shared/__init__.py

@@ -0,0 +1 @@
+# Shared modules package

backend/shared/constants.py

@@ -0,0 +1,50 @@
+import os
+
+# Database
+DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///data/database.db")
+
+# JWT
+JWT_SECRET_KEY = os.getenv("JWT_SECRET", "default-jwt-secret-for-development")
+JWT_ALGORITHM = "HS256"
+# Token inactivity expiration - token expires if not used for this duration
+TOKEN_INACTIVITY_EXPIRE_HOURS = 30 * 24  # 30 days of inactivity
+# Maximum token lifetime (safety net) - tokens expire after this regardless of usage
+MAX_TOKEN_LIFETIME_HOURS = 365 * 24  # 1 year maximum
+
+# Owner user
+OWNER_USERNAME = os.getenv("OWNER_USERNAME", "owner")
+
+# Push notifications
+VAPID_PRIVATE_KEY = os.getenv("VAPID_PRIVATE_KEY", "")
+VAPID_PUBLIC_KEY = os.getenv("VAPID_PUBLIC_KEY", "")
+VAPID_SUBJECT = os.getenv("VAPID_SUBJECT", "mailto:admin@example.com")
+
+# Rate limiting
+RATE_LIMIT_REQUESTS = int(os.getenv("RATE_LIMIT_REQUESTS", "100"))
+RATE_LIMIT_WINDOW = int(os.getenv("RATE_LIMIT_WINDOW", "60"))
+
+# File uploads
+MAX_UPLOAD_SIZE = int(os.getenv("MAX_UPLOAD_SIZE", "10485760"))  # 10MB
+ALLOWED_EXTENSIONS = {".jpg", ".jpeg", ".png", ".gif", ".webp", ".mp4", ".mov", ".avi", ".mp3", ".wav"}
+
+# WebSocket
+WEBSOCKET_PING_INTERVAL = 30
+WEBSOCKET_PING_TIMEOUT = 60
+
+# Encryption
+ENCRYPTION_KEY_LENGTH = 32
+ENCRYPTION_NONCE_LENGTH = 12
+
+# Moderation
+PROFANITY_THRESHOLD = float(os.getenv("PROFANITY_THRESHOLD", "0.8"))
+SIMILARITY_THRESHOLD = float(os.getenv("SIMILARITY_THRESHOLD", "0.85"))
+
+# WebRTC
+WEBRTC_ICE_SERVERS = [
+    {"urls": "stun:stun.l.google.com:19302"},
+    {"urls": "stun:stun1.l.google.com:19302"}
+]
+
+# Logging
+LOG_LEVEL = os.getenv("LOG_LEVEL", "INFO")
+LOG_FORMAT = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"

backend/shared/db.py

@@ -0,0 +1,62 @@
+import os
+from sqlalchemy.orm import sessionmaker, Session
+from sqlalchemy import create_engine
+from .constants import DATABASE_URL
+
+# Database connection settings
+POOL_SIZE = int(os.getenv("DB_POOL_SIZE", "20"))
+MAX_OVERFLOW = int(os.getenv("DB_MAX_OVERFLOW", "40"))
+POOL_RECYCLE = int(os.getenv("DB_POOL_RECYCLE", "1800"))
+POOL_TIMEOUT = int(os.getenv("DB_POOL_TIMEOUT", "30"))
+
+POOL_CONFIG = {
+    "pool_size": POOL_SIZE,
+    "max_overflow": MAX_OVERFLOW,
+    "pool_recycle": POOL_RECYCLE,
+    "pool_timeout": POOL_TIMEOUT,
+    "pool_pre_ping": True,
+}
+
+def create_engine_from_url(database_url: str):
+    """Create SQLAlchemy engine from database URL."""
+    connect_args = {}
+    if database_url.startswith("sqlite"):
+        connect_args["check_same_thread"] = False
+
+    engine_kwargs = {
+        "pool_size": POOL_SIZE,
+        "max_overflow": MAX_OVERFLOW,
+        "pool_recycle": POOL_RECYCLE,
+        "pool_pre_ping": True,
+        "pool_timeout": POOL_TIMEOUT,
+    }
+
+    engine = create_engine(
+        database_url,
+        connect_args=connect_args,
+        **engine_kwargs,
+    )
+
+    return engine
+
+# Create engine - this should be called by each service with its own DATABASE_URL
+def get_engine(database_url: str = None):
+    """Get SQLAlchemy engine for the given database URL."""
+    url = database_url or DATABASE_URL
+    return create_engine_from_url(url)
+
+# Session factory - create per service
+def get_session_factory(database_url: str = None):
+    """Get session factory for the given database URL."""
+    engine = get_engine(database_url)
+    return sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Dependency for FastAPI - create per service
+def get_db(database_url: str = None):
+    """FastAPI dependency to get database session."""
+    SessionLocal = get_session_factory(database_url)
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

backend/shared/dependencies.py

@@ -0,0 +1,122 @@
+from datetime import datetime, timedelta
+from fastapi import Depends, HTTPException, Request, status
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from sqlalchemy.orm import Session
+from backend.shared.utils import verify_token
+from backend.shared.models import User, DeviceSession
+from backend.shared.db import get_session_factory
+import logging
+
+security = HTTPBearer()
+logger = logging.getLogger("uvicorn.error")
+
+# Зависимость для получения сессии БД
+SessionLocal = get_session_factory()
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+# Зависимость для получения текущего пользователя
+def get_current_user(
+    request: Request,
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    db: Session = Depends(get_db),
+) -> User:
+    token = credentials.credentials
+    try:
+        payload = verify_token(token)
+    except Exception as e:
+        logger.warning("get_current_user: token verification error: %s", str(e))
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid or expired token",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    if not payload:
+        logger.info("get_current_user: verify_token returned empty payload")
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid or expired token",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    user = db.query(User).filter(User.id == payload["user_id"]).first()
+    if not user:
+        logger.info("get_current_user: user not found for user_id=%s", payload.get("user_id"))
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    if user.id == 1 and user.suspended:
+        user.suspended = False
+        user.suspension_reason = None
+        db.commit()
+        db.refresh(user)
+
+    # Validate device session from JWT
+    session_id = payload.get("session_id")
+    if not session_id:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid session",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    device_session = (
+        db.query(DeviceSession)
+        .filter(DeviceSession.user_id == user.id, DeviceSession.session_id == session_id)
+        .first()
+    )
+
+    if not device_session or device_session.revoked:
+        logger.info("get_current_user: session missing/revoked for user_id=%s session_id=%s", user.id, session_id)
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Session revoked or not found",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    # Check if session has been inactive for too long (sliding expiration)
+    from backend.shared.constants import TOKEN_INACTIVITY_EXPIRE_HOURS
+    inactivity_threshold = datetime.now() - timedelta(hours=TOKEN_INACTIVITY_EXPIRE_HOURS)
+    if device_session.last_seen < inactivity_threshold:
+        # Session expired due to inactivity - revoke it
+        device_session.revoked = True
+        db.commit()
+        logger.info("get_current_user: session expired due to inactivity for user_id=%s session_id=%s", user.id, session_id)
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Session expired due to inactivity",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    # Touch last_seen on valid session (sliding expiration - extends token life)
+    device_session.last_seen = datetime.now()
+    db.commit()
+
+    # Check if user is suspended
+    if user.suspended:
+        logger.info("get_current_user: account suspended for user_id=%s reason=%s", user.id, user.suspension_reason)
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Account suspended",
+            headers={"suspension_reason": user.suspension_reason or "No reason provided"},
+        )
+
+    # Check if user is deleted
+    if user.deleted:
+        logger.info("get_current_user: account deleted for user_id=%s", user.id)
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Account deleted",
+        )
+
+    request.state.current_user = user
+    request.state.session_id = session_id
+
+    return user

backend/shared/models.py

@@ -0,0 +1,423 @@
+from sqlalchemy import Column, Integer, String, Text, DateTime, Boolean, ForeignKey, Float, JSON, BigInteger, UniqueConstraint
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship
+from datetime import datetime
+import json
+from pydantic import BaseModel
+
+Base = declarative_base()
+
+class User(Base):
+    __tablename__ = "users"
+    __table_args__ = {"schema": "account_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    username = Column(String(50), unique=True, index=True, nullable=False)
+    hashed_password = Column(String(255), nullable=False)
+    salt = Column(String(64), nullable=False)
+    display_name = Column(String(100), nullable=True)
+    bio = Column(Text, nullable=True)
+    avatar_url = Column(String(255), nullable=True)
+    is_online = Column(Boolean, default=False)
+    last_seen = Column(DateTime, default=datetime.utcnow)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    verified = Column(Boolean, default=False)
+    verification_token = Column(String(255), nullable=True)
+    reset_token = Column(String(255), nullable=True)
+    reset_token_expires = Column(DateTime, nullable=True)
+    two_factor_enabled = Column(Boolean, default=False)
+    two_factor_secret = Column(String(255), nullable=True)
+    login_attempts = Column(Integer, default=0)
+    locked_until = Column(DateTime, nullable=True)
+    public_key = Column(Text, nullable=True)
+    private_key = Column(Text, nullable=True)
+    encryption_enabled = Column(Boolean, default=False)
+    suspended = Column(Boolean, default=False)
+    suspension_reason = Column(Text, nullable=True)
+    deleted = Column(Boolean, default=False)
+
+    # Relationships
+    messages = relationship("Message", back_populates="sender", cascade="all, delete-orphan")
+    message_recipients = relationship("MessageRecipient", back_populates="recipient", cascade="all, delete-orphan")
+    devices = relationship("Device", back_populates="user", cascade="all, delete-orphan")
+    push_subscriptions = relationship("PushSubscription", back_populates="user", cascade="all, delete-orphan")
+
+class Message(Base):
+    __tablename__ = "messages"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    sender_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+    content = Column(Text, nullable=False)
+    content_type = Column(String(50), default="text")
+    encrypted_content = Column(Text, nullable=True)
+    signature = Column(Text, nullable=True)
+    timestamp = Column(DateTime, default=datetime.utcnow, index=True)
+    edited_at = Column(DateTime, nullable=True)
+    edited = Column(Boolean, default=False)
+    deleted = Column(Boolean, default=False)
+    reply_to_id = Column(BigInteger, ForeignKey("messaging_schema.messages.id"), nullable=True)
+    thread_id = Column(BigInteger, ForeignKey("messaging_schema.messages.id"), nullable=True)
+    is_public = Column(Boolean, default=False)
+
+    # Relationships
+    sender = relationship("User", back_populates="messages")
+    recipients = relationship("MessageRecipient", back_populates="message", cascade="all, delete-orphan")
+    reply_to = relationship("Message", remote_side=[id], foreign_keys=[reply_to_id])
+    thread = relationship("Message", remote_side=[id], foreign_keys=[thread_id])
+    reactions = relationship("MessageReaction", back_populates="message", cascade="all, delete-orphan")
+    files = relationship("MessageFile", back_populates="message", cascade="all, delete-orphan")
+
+class MessageRecipient(Base):
+    __tablename__ = "message_recipients"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    message_id = Column(BigInteger, ForeignKey("messaging_schema.messages.id"), nullable=False, index=True)
+    recipient_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+    read_at = Column(DateTime, nullable=True)
+    delivered_at = Column(DateTime, nullable=True)
+    encrypted_key = Column(Text, nullable=True)
+
+    # Relationships
+    message = relationship("Message", back_populates="recipients")
+    recipient = relationship("User", back_populates="message_recipients")
+
+class MessageReaction(Base):
+    __tablename__ = "message_reactions"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    message_id = Column(BigInteger, ForeignKey("messaging_schema.messages.id"), nullable=False, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+    reaction = Column(String(50), nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    message = relationship("Message", back_populates="reactions")
+
+class Device(Base):
+    __tablename__ = "devices"
+    __table_args__ = {"schema": "device_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+    device_id = Column(String(255), unique=True, nullable=False, index=True)
+    device_name = Column(String(255), nullable=True)
+    device_type = Column(String(50), nullable=True)
+    public_key = Column(Text, nullable=True)
+    signed_prekey = Column(Text, nullable=True)
+    one_time_prekeys = Column(JSON, nullable=True)
+    last_active = Column(DateTime, default=datetime.utcnow)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    user = relationship("User", back_populates="devices")
+    push_subscriptions = relationship("PushSubscription", back_populates="device", cascade="all, delete-orphan")
+
+class PushSubscription(Base):
+    __tablename__ = "push_subscriptions"
+    __table_args__ = {"schema": "push_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+    device_id = Column(BigInteger, ForeignKey("device_schema.devices.id"), nullable=True, index=True)
+    endpoint = Column(String(500), nullable=False)
+    p256dh = Column(String(255), nullable=False)
+    auth = Column(String(255), nullable=False)
+    user_agent = Column(String(500), nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    user = relationship("User", back_populates="push_subscriptions")
+    device = relationship("Device", back_populates="push_subscriptions")
+
+class WebRTCSession(Base):
+    __tablename__ = "webrtc_sessions"
+    __table_args__ = {"schema": "webrtc_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    session_id = Column(String(255), unique=True, nullable=False, index=True)
+    initiator_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    participant_ids = Column(JSON, nullable=False)
+    offer = Column(JSON, nullable=True)
+    answer = Column(JSON, nullable=True)
+    ice_candidates = Column(JSON, nullable=True)
+    status = Column(String(50), default="pending")
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+class ModerationAction(Base):
+    __tablename__ = "moderation_actions"
+    __table_args__ = {"schema": "moderation_schema"}
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    moderator_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    target_user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=True)
+    target_message_id = Column(BigInteger, ForeignKey("messaging_schema.messages.id"), nullable=True)
+    action_type = Column(String(50), nullable=False)
+    reason = Column(Text, nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    expires_at = Column(DateTime, nullable=True)
+
+
+class MessageFile(Base):
+    __tablename__ = "message_file"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    message_id = Column(BigInteger, ForeignKey("messaging_schema.messages.id"), nullable=False, index=True)
+    path = Column(Text, nullable=False)
+    name = Column(Text, nullable=False)
+
+    message = relationship("Message", back_populates="files")
+
+
+class CryptoPublicKey(Base):
+    __tablename__ = "crypto_public_key"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, unique=True)
+    public_key_b64 = Column(Text, nullable=False)
+
+
+class CryptoBackup(Base):
+    __tablename__ = "crypto_backup"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, unique=True)
+    blob_json = Column(Text, nullable=False)
+
+
+class DMEnvelope(Base):
+    __tablename__ = "dm_envelope"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    sender_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    recipient_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    iv_b64 = Column(Text, nullable=False)
+    ciphertext_b64 = Column(Text, nullable=False)
+    salt_b64 = Column(Text, nullable=False)
+    iv2_b64 = Column(Text, nullable=False)
+    wrapped_mk_b64 = Column(Text, nullable=False)
+    reply_to_id = Column(Integer, nullable=True)
+    timestamp = Column(DateTime, default=datetime.now)
+    files = relationship("DMFile", back_populates="message", cascade="all, delete-orphan", lazy="select")
+    reactions = relationship("DMReaction", cascade="all, delete-orphan", lazy="select")
+
+
+class DMFile(Base):
+    __tablename__ = "dm_file"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    message_id = Column(Integer, ForeignKey("messaging_schema.dm_envelope.id"), nullable=False, index=True)
+    sender_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    recipient_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    name = Column(Text, nullable=False)
+    path = Column(Text, nullable=False)
+
+    message = relationship("DMEnvelope", back_populates="files")
+
+
+class FcmToken(Base):
+    __tablename__ = "fcm_token"
+    __table_args__ = {"schema": "push_schema"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+    token = Column(Text, nullable=False, unique=True)
+    created_at = Column(DateTime, default=datetime.now)
+    updated_at = Column(DateTime, default=datetime.now, onupdate=datetime.now)
+
+
+class Reaction(Base):
+    __tablename__ = "reaction"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    message_id = Column(BigInteger, ForeignKey("messaging_schema.messages.id"), nullable=False, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    emoji = Column(String(10), nullable=False)  # Store emoji as string
+    timestamp = Column(DateTime, default=datetime.now)
+
+    # Relationships
+    user = relationship("User")
+
+    # Ensure unique combination of message, user, and emoji
+    __table_args__ = (UniqueConstraint('message_id', 'user_id', 'emoji', name='unique_reaction'),)
+
+
+class DMReaction(Base):
+    __tablename__ = "dm_reaction"
+    __table_args__ = {"schema": "messaging_schema"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    dm_envelope_id = Column(Integer, ForeignKey("messaging_schema.dm_envelope.id"), nullable=False, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False)
+    emoji = Column(String(10), nullable=False)  # Store emoji as string
+    timestamp = Column(DateTime, default=datetime.now)
+
+    # Relationships
+    user = relationship("User")
+    dm_envelope = relationship("DMEnvelope", overlaps="reactions")
+
+    # Ensure unique combination of dm_envelope, user, and emoji
+    __table_args__ = (UniqueConstraint('dm_envelope_id', 'user_id', 'emoji', name='unique_dm_reaction'),)
+
+
+# Tracks authenticated device sessions per user
+class DeviceSession(Base):
+    __tablename__ = "device_session"
+    __table_args__ = {"schema": "device_schema"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+
+    # Raw User-Agent for reference/debugging
+    raw_user_agent = Column(Text, nullable=True)
+
+    # Parsed fields
+    device_name = Column(String(128), nullable=True)
+    device_type = Column(String(32), nullable=True)  # desktop/mobile/tablet/bot/unknown
+    os_name = Column(String(64), nullable=True)
+    os_version = Column(String(64), nullable=True)
+    browser_name = Column(String(64), nullable=True)
+    browser_version = Column(String(64), nullable=True)
+    brand = Column(String(64), nullable=True)
+    model = Column(String(64), nullable=True)
+
+    # Session identity embedded into JWTs
+    session_id = Column(String(64), unique=True, nullable=False, index=True)
+
+    # Lifecycle
+    created_at = Column(DateTime, default=datetime.now)
+    last_seen = Column(DateTime, default=datetime.now)
+    revoked = Column(Boolean, default=False)
+
+    # Relationship back to user (optional lazy to avoid heavy loads)
+    user = relationship("User", lazy="select")
+
+
+# Pydantic models
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+
+class RegisterRequest(BaseModel):
+    username: str
+    display_name: str
+    password: str
+    confirm_password: str
+
+
+class ChangePasswordRequest(BaseModel):
+    currentPasswordDerived: str
+    newPasswordDerived: str
+    logoutAllExceptCurrent: bool = False
+
+
+class SendMessageRequest(BaseModel):
+    content: str
+    reply_to_id: int | None = None
+
+
+class EditMessageRequest(BaseModel):
+    content: str
+
+
+class DeleteMessageRequest(BaseModel):
+    message_id: int
+
+
+class UpdateBioRequest(BaseModel):
+    bio: str
+
+
+class PushSubscriptionRequest(BaseModel):
+    endpoint: str
+    keys: dict
+
+
+class UserProfileResponse(BaseModel):
+    id: int
+    username: str
+    display_name: str
+    profile_picture: str | None
+    bio: str | None
+    online: bool
+    last_seen: datetime | None
+    created_at: datetime | None
+    verified: bool
+    suspended: bool
+    suspension_reason: str | None
+    deleted: bool
+
+    class Config:
+        from_attributes = True
+
+
+class MessageResponse(BaseModel):
+    id: int
+    content: str
+    timestamp: datetime
+    is_author: bool
+    is_read: bool
+    username: str
+    profile_picture: str | None
+
+    class Config:
+        from_attributes = True
+
+
+class ReactionRequest(BaseModel):
+    message_id: int
+    emoji: str
+
+
+class ReactionResponse(BaseModel):
+    id: int
+    message_id: int
+    user_id: int
+    emoji: str
+    timestamp: datetime
+    username: str
+
+    class Config:
+        from_attributes = True
+
+
+class DMReactionRequest(BaseModel):
+    dm_envelope_id: int
+    emoji: str
+
+
+class DMReactionResponse(BaseModel):
+    id: int
+    dm_envelope_id: int
+    user_id: int
+    emoji: str
+    timestamp: datetime
+    username: str
+
+    class Config:
+        from_attributes = True
+
+
+class UpdateLog(Base):
+    """Stores update sequence numbers and updates for gap detection"""
+    __tablename__ = "update_log"
+    __table_args__ = {"schema": "public"}
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(BigInteger, ForeignKey("account_schema.users.id"), nullable=False, index=True)
+    sequence = Column(Integer, nullable=False, index=True)
+    updates = Column(Text, nullable=False)  # JSON array of updates
+    timestamp = Column(DateTime, default=datetime.now, index=True)
+
+    __table_args__ = (
+        UniqueConstraint("user_id", "sequence", name="uq_user_sequence"),
+    )

backend/shared/similarity.py

@@ -0,0 +1,147 @@
+"""
+Similarity detection utilities for username and display name comparison.
+Implements both edit distance and visual similarity detection.
+"""
+
+def levenshtein_distance(s1: str, s2: str) -> int:
+    """Calculate Levenshtein distance between two strings."""
+    if len(s1) < len(s2):
+        return levenshtein_distance(s2, s1)
+
+    if len(s2) == 0:
+        return len(s1)
+
+    previous_row = list(range(len(s2) + 1))
+    for i, c1 in enumerate(s1):
+        current_row = [i + 1]
+        for j, c2 in enumerate(s2):
+            insertions = previous_row[j + 1] + 1
+            deletions = current_row[j] + 1
+            substitutions = previous_row[j] + (c1 != c2)
+            current_row.append(min(insertions, deletions, substitutions))
+        previous_row = current_row
+    
+    return previous_row[-1]
+
+
+def check_visual_similarity(s1: str, s2: str) -> bool:
+    """
+    Check if two strings are visually similar using common homoglyphs.
+    Returns True if strings are visually similar.
+    """
+    if len(s1) != len(s2):
+        return False
+    
+    # Common homoglyph mappings
+    homoglyphs = {
+        '0': ['O', 'o', 'Q'],
+        'O': ['0', 'o', 'Q'],
+        'o': ['0', 'O', 'Q'],
+        '1': ['l', 'I', '|'],
+        'l': ['1', 'I', '|'],
+        'I': ['1', 'l', '|'],
+        '5': ['S', 's'],
+        'S': ['5', 's'],
+        's': ['5', 'S'],
+        '6': ['G', 'g'],
+        'G': ['6', 'g'],
+        'g': ['6', 'G'],
+        '8': ['B', 'b'],
+        'B': ['8', 'b'],
+        'b': ['8', 'B'],
+        '9': ['g', 'q'],
+        'g': ['9', 'q'],
+        'q': ['9', 'g'],
+        '2': ['Z', 'z'],
+        'Z': ['2', 'z'],
+        'z': ['2', 'Z'],
+        '3': ['E'],
+        'E': ['3'],
+        '4': ['A'],
+        'A': ['4'],
+        '7': ['T', 't'],
+        'T': ['7', 't'],
+        't': ['7', 'T'],
+    }
+    
+    for i in range(len(s1)):
+        c1, c2 = s1[i], s2[i]
+        if c1 == c2:
+            continue
+        
+        # Check if characters are homoglyphs
+        if (c1 in homoglyphs and c2 in homoglyphs[c1]) or \
+           (c2 in homoglyphs and c1 in homoglyphs[c2]):
+            continue
+        
+        return False
+    
+    return True
+
+
+def check_username_similarity(username1: str, username2: str) -> bool:
+    """
+    Check if two usernames are similar using both edit distance and visual similarity.
+    Returns True if usernames are considered similar.
+    """
+    if username1 == username2:
+        return False
+    
+    # Check edit distance (Levenshtein distance <= 2)
+    edit_distance = levenshtein_distance(username1.lower(), username2.lower())
+    if edit_distance <= 2:
+        return True
+    
+    # Check visual similarity
+    if check_visual_similarity(username1, username2):
+        return True
+    
+    return False
+
+
+def check_display_name_similarity(display_name1: str, display_name2: str) -> bool:
+    """
+    Check if two display names are similar using both edit distance and visual similarity.
+    Returns True if display names are considered similar.
+    """
+    if display_name1 == display_name2:
+        return False
+    
+    # Check edit distance (Levenshtein distance <= 2)
+    edit_distance = levenshtein_distance(display_name1.lower(), display_name2.lower())
+    if edit_distance <= 2:
+        return True
+    
+    # Check visual similarity
+    if check_visual_similarity(display_name1, display_name2):
+        return True
+    
+    return False
+
+
+def is_user_similar_to_verified(user_username: str, user_display_name: str, 
+                               verified_users: list[dict]) -> tuple[bool, str]:
+    """
+    Check if a user is similar to any verified user.
+    
+    Args:
+        user_username: Username to check
+        user_display_name: Display name to check
+        verified_users: List of verified user dictionaries with 'username' and 'display_name' keys
+    
+    Returns:
+        Tuple of (is_similar, similar_to_username)
+    """
+    for verified_user in verified_users:
+        verified_username = verified_user.get('username', '')
+        verified_display_name = verified_user.get('display_name', '')
+        
+        # Check username similarity
+        if check_username_similarity(user_username, verified_username):
+            return True, verified_username
+        
+        # Check display name similarity
+        if check_display_name_similarity(user_display_name, verified_display_name):
+            return True, verified_username
+    
+    return False, ""

backend/shared/utils.py

@@ -0,0 +1,234 @@
+import secrets
+import string
+import hashlib
+import hmac
+import base64
+import json
+from datetime import datetime, timedelta
+from typing import Optional
+import re
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
+from cryptography.hazmat.backends import default_backend
+import nacl.secret
+import nacl.utils
+from fastapi import Request
+import jwt
+import bcrypt
+from backend.shared.constants import JWT_SECRET_KEY, JWT_ALGORITHM, MAX_TOKEN_LIFETIME_HOURS
+import ipaddress
+
+def generate_secure_token(length: int = 32) -> str:
+    """Generate a cryptographically secure random token."""
+    alphabet = string.ascii_letters + string.digits
+    return ''.join(secrets.choice(alphabet) for _ in range(length))
+
+def hash_password(password: str, salt: Optional[bytes] = None) -> tuple[str, bytes]:
+    """Hash a password with PBKDF2 and return (hash, salt)."""
+    if salt is None:
+        salt = secrets.token_bytes(32)
+
+    kdf = PBKDF2HMAC(
+        algorithm=hashes.SHA256(),
+        length=32,
+        salt=salt,
+        iterations=100000,
+        backend=default_backend()
+    )
+
+    key = kdf.derive(password.encode())
+    return base64.b64encode(key).decode(), salt
+
+def verify_password(password: str, hashed: str, salt: bytes) -> bool:
+    """Verify a password against its hash and salt."""
+    try:
+        key = base64.b64decode(hashed)
+        kdf = PBKDF2HMAC(
+            algorithm=hashes.SHA256(),
+            length=32,
+            salt=salt,
+            iterations=100000,
+            backend=default_backend()
+        )
+        kdf.verify(password.encode(), key)
+        return True
+    except:
+        return False
+
+def generate_verification_token() -> str:
+    """Generate a verification token for email verification."""
+    return generate_secure_token(64)
+
+def generate_reset_token() -> str:
+    """Generate a password reset token."""
+    return generate_secure_token(64)
+
+def get_client_ip(request: Request) -> str:
+    """Extract the real client IP from the request."""
+    # Check X-Forwarded-For header first
+    forwarded_for = request.headers.get("X-Forwarded-For")
+    if forwarded_for:
+        # Take the first IP in case of multiple proxies
+        client_ip = forwarded_for.split(",")[0].strip()
+        try:
+            # Validate IP address
+            ipaddress.ip_address(client_ip)
+            return client_ip
+        except ValueError:
+            pass
+
+    # Check X-Real-IP header
+    real_ip = request.headers.get("X-Real-IP")
+    if real_ip:
+        try:
+            ipaddress.ip_address(real_ip)
+            return real_ip
+        except ValueError:
+            pass
+
+    # Fallback to request.client.host
+    client_host = request.client.host if request.client else "unknown"
+    try:
+        ipaddress.ip_address(client_host)
+        return client_host
+    except ValueError:
+        return "unknown"
+
+def validate_email(email: str) -> bool:
+    """Validate email address format."""
+    pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
+    return re.match(pattern, email) is not None
+
+def validate_username(username: str) -> bool:
+    """Validate username format."""
+    if not username or len(username) < 3 or len(username) > 50:
+        return False
+
+    # Allow alphanumeric, underscore, and hyphen
+    pattern = r'^[a-zA-Z0-9_-]+$'
+    return re.match(pattern, username) is not None
+
+def sanitize_filename(filename: str) -> str:
+    """Sanitize filename to prevent directory traversal."""
+    return re.sub(r'[^\w\.-]', '_', filename)
+
+def generate_file_hash(content: bytes) -> str:
+    """Generate SHA256 hash of file content."""
+    return hashlib.sha256(content).hexdigest()
+
+def encrypt_data(data: str, key: bytes) -> str:
+    """Encrypt data using NaCl secret box."""
+    box = nacl.secret.SecretBox(key)
+    encrypted = box.encrypt(data.encode())
+    return base64.b64encode(encrypted).decode()
+
+def decrypt_data(encrypted_data: str, key: bytes) -> str:
+    """Decrypt data using NaCl secret box."""
+    box = nacl.secret.SecretBox(key)
+    encrypted = base64.b64decode(encrypted_data)
+    decrypted = box.decrypt(encrypted)
+    return decrypted.decode()
+
+def generate_encryption_key() -> bytes:
+    """Generate a new encryption key."""
+    return nacl.utils.random(nacl.secret.SecretBox.KEY_SIZE)
+
+def format_datetime(dt: datetime) -> str:
+    """Format datetime for API responses."""
+    return dt.isoformat()
+
+def parse_datetime(dt_str: str) -> Optional[datetime]:
+    """Parse datetime from API requests."""
+    try:
+        return datetime.fromisoformat(dt_str.replace('Z', '+00:00'))
+    except:
+        return None
+
+def calculate_age(birth_date: datetime) -> int:
+    """Calculate age from birth date."""
+    today = datetime.now()
+    age = today.year - birth_date.year
+    if today.month < birth_date.month or (today.month == birth_date.month and today.day < birth_date.day):
+        age -= 1
+    return age
+
+def truncate_text(text: str, max_length: int, suffix: str = "...") -> str:
+    """Truncate text to max length with suffix."""
+    if len(text) <= max_length:
+        return text
+    return text[:max_length - len(suffix)] + suffix
+
+def is_valid_url(url: str) -> bool:
+    """Validate URL format."""
+    pattern = r'^https?://[^\s/$.?#].[^\s]*$'
+    return re.match(pattern, url) is not None
+
+def generate_device_id() -> str:
+    """Generate a unique device identifier."""
+    return generate_secure_token(32)
+
+def normalize_phone_number(phone: str) -> str:
+    """Normalize phone number format."""
+    # Remove all non-digit characters except +
+    normalized = re.sub(r'[^\d+]', '', phone)
+
+    # Ensure it starts with +
+    if not normalized.startswith('+'):
+        if normalized.startswith('00'):
+            normalized = '+' + normalized[2:]
+        else:
+            normalized = '+' + normalized
+
+    return normalized
+
+
+def create_token(user_id: int, username: str, session_id: str) -> str:
+    # Set a long expiration as safety net (actual expiration based on inactivity)
+    expire = datetime.now() + timedelta(hours=MAX_TOKEN_LIFETIME_HOURS)
+    payload = {
+        "user_id": user_id,
+        "username": username,
+        "session_id": session_id,
+        "exp": int(expire.timestamp())  # JWT exp must be Unix timestamp (int)
+    }
+    return jwt.encode(payload, JWT_SECRET_KEY, algorithm=JWT_ALGORITHM)
+
+
+def get_password_hash(password: str) -> str:
+    return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return bcrypt.checkpw(plain_password.encode("utf-8"), hashed_password.encode("utf-8"))
+
+
+def verify_token(token: str) -> Optional[dict]:
+    try:
+        payload = jwt.decode(token, JWT_SECRET_KEY, algorithms=[JWT_ALGORITHM])
+        return payload
+    except jwt.ExpiredSignatureError:
+        return None
+    except jwt.InvalidTokenError:
+        return None
+
+
+def _is_admin(user) -> bool:
+    return user.id == 1
+
+
+def convert_user(user) -> dict:
+    return {
+        "id": user.id,
+        "created_at": user.created_at.isoformat(),
+        "last_seen": user.last_seen.isoformat(),
+        "online": user.online,
+        "username": user.username,
+        "display_name": user.display_name,
+        "profile_picture": user.profile_picture,
+        "bio": user.bio,
+        "admin": _is_admin(user),
+        "verified": user.verified,
+        "suspended": user.suspended or False,
+        "suspension_reason": user.suspension_reason,
+        "deleted": (user.deleted or user.suspended) or False  # Treat suspended as deleted
+    }

backend/shared/validation.py

@@ -0,0 +1,132 @@
+from typing import Optional
+from pydantic import BaseModel, EmailStr, Field, validator
+import re
+
+
+def is_valid_username(username: str) -> bool:
+    if len(username) < 3 or len(username) > 20:
+        return False
+    # Only allow English letters, numbers, dashes and underscores
+    if not re.match(r'^[a-zA-Z0-9_-]+$', username):
+        return False
+    return True
+
+
+def is_valid_display_name(display_name: str) -> bool:
+    if len(display_name) < 1 or len(display_name) > 64:
+        return False
+    # Check if not blank (only whitespace)
+    if not display_name.strip():
+        return False
+    return True
+
+
+def is_valid_password(password: str) -> bool:
+    if len(password) < 5 or len(password) > 50:
+        return False
+    if re.search(r'[\s\u180E\u200B-\u200D\u2060\uFEFF]', password):
+        return False
+    return True
+
+class UserCreate(BaseModel):
+    username: str = Field(min_length=3, max_length=50)
+    email: EmailStr
+    password: str = Field(min_length=8, max_length=128)
+    display_name: Optional[str] = Field(None, max_length=100)
+
+    @validator('username')
+    def username_alphanumeric(cls, v):
+        if not re.match(r'^[a-zA-Z0-9_-]+$', v):
+            raise ValueError('Username must be alphanumeric with underscores or hyphens')
+        return v
+
+    @validator('password')
+    def password_strength(cls, v):
+        if not re.search(r'[A-Z]', v):
+            raise ValueError('Password must contain at least one uppercase letter')
+        if not re.search(r'[a-z]', v):
+            raise ValueError('Password must contain at least one lowercase letter')
+        if not re.search(r'\d', v):
+            raise ValueError('Password must contain at least one digit')
+        return v
+
+class UserLogin(BaseModel):
+    username_or_email: str = Field(min_length=1, max_length=100)
+    password: str = Field(min_length=1, max_length=128)
+
+class UserUpdate(BaseModel):
+    display_name: Optional[str] = Field(None, max_length=100)
+    bio: Optional[str] = Field(None, max_length=500)
+    avatar_url: Optional[str] = Field(None, max_length=255)
+
+    @validator('avatar_url')
+    def validate_avatar_url(cls, v):
+        if v and not v.startswith(('http://', 'https://')):
+            raise ValueError('Avatar URL must be a valid HTTP/HTTPS URL')
+        return v
+
+class MessageCreate(BaseModel):
+    content: str = Field(min_length=1, max_length=10000)
+    content_type: str = Field(default="text", pattern=r'^(text|image|video|audio|file)$')
+    reply_to_id: Optional[int] = None
+    recipient_ids: list[int] = Field(min_items=1, max_items=100)
+
+class MessageUpdate(BaseModel):
+    content: str = Field(min_length=1, max_length=10000)
+
+class DeviceRegister(BaseModel):
+    device_id: str = Field(min_length=1, max_length=255)
+    device_name: Optional[str] = Field(None, max_length=255)
+    device_type: Optional[str] = Field(None, max_length=50)
+    public_key: Optional[str] = Field(None, max_length=10000)
+
+class PushSubscriptionCreate(BaseModel):
+    endpoint: str = Field(max_length=500)
+    p256dh: str = Field(max_length=255)
+    auth: str = Field(max_length=255)
+    device_id: Optional[str] = Field(None, max_length=255)
+
+class WebRTCOffer(BaseModel):
+    offer: dict
+    participant_ids: list[int] = Field(min_items=1, max_items=10)
+
+class WebRTCAnswer(BaseModel):
+    answer: dict
+    session_id: str = Field(max_length=255)
+
+class WebRTCIceCandidate(BaseModel):
+    candidate: dict
+    session_id: str = Field(max_length=255)
+
+class ModerationActionCreate(BaseModel):
+    target_user_id: Optional[int] = None
+    target_message_id: Optional[int] = None
+    action_type: str = Field(pattern=r'^(ban|mute|delete|warn)$')
+    reason: Optional[str] = Field(None, max_length=1000)
+    duration_hours: Optional[int] = Field(None, gt=0, le=8760)  # Max 1 year
+
+class PasswordResetRequest(BaseModel):
+    email: EmailStr
+
+class PasswordReset(BaseModel):
+    token: str = Field(min_length=64, max_length=64)
+    new_password: str = Field(..., min_length=8, max_length=128)
+
+    @validator('new_password')
+    def password_strength(cls, v):
+        if not re.search(r'[A-Z]', v):
+            raise ValueError('Password must contain at least one uppercase letter')
+        if not re.search(r'[a-z]', v):
+            raise ValueError('Password must contain at least one lowercase letter')
+        if not re.search(r'\d', v):
+            raise ValueError('Password must contain at least one digit')
+        return v
+
+class TwoFactorSetup(BaseModel):
+    code: str = Field(pattern=r'^\d{6}$')
+
+class TwoFactorVerify(BaseModel):
+    code: str = Field(pattern=r'^\d{6}$')
+
+class EmailVerification(BaseModel):
+    token: str = Field(min_length=64, max_length=64)

backend/utils.py

@@ -1,17 +1,20 @@
 from datetime import datetime, timedelta
+from fastapi import Request
 import jwt
-from typing import Optional
+from typing import Optional, Any
 import bcrypt
 
-from constants import *
+from constants import MAX_TOKEN_LIFETIME_HOURS, JWT_SECRET_KEY, JWT_ALGORITHM
 
 # JWT Helper Functions
-def create_token(user_id: int, username: str) -> str:
-    expire = datetime.now() + timedelta(hours=ACCESS_TOKEN_EXPIRE_HOURS)
+def create_token(user_id: int, username: str, session_id: str) -> str:
+    # Set a long expiration as safety net (actual expiration based on inactivity)
+    expire = datetime.now() + timedelta(hours=MAX_TOKEN_LIFETIME_HOURS)
     payload = {
         "user_id": user_id,
         "username": username,
-        "exp": expire
+        "session_id": session_id,
+        "exp": int(expire.timestamp())  # JWT exp must be Unix timestamp (int)
     }
     return jwt.encode(payload, JWT_SECRET_KEY, algorithm=JWT_ALGORITHM)
 
@@ -31,3 +34,38 @@ def verify_password(plain_password: str, hashed_password: str) -> bool:
 
 def get_password_hash(password: str) -> str:
     return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")
+
+
+def get_client_ip(request: Request) -> Optional[str]:
+    if not request:
+        return None
+
+    headers = request.headers
+    
+    # First, check x-real-ip header (set by some proxies, or configured in Caddy)
+    real_ip = headers.get("x-real-ip") or headers.get("X-Real-IP")
+    if real_ip:
+        candidate = real_ip.strip()
+        if candidate:
+            return candidate
+    
+    # Fall back to x-forwarded-for header (Caddy sets this automatically)
+    forwarded = headers.get("x-forwarded-for") or headers.get("X-Forwarded-For")
+    if forwarded:
+        # X-Forwarded-For can contain multiple IPs: "client, proxy1, proxy2"
+        # Take the first one (original client IP)
+        candidate = forwarded.split(",")[0].strip()
+        if candidate:
+            return candidate
+
+    # Fall back to direct client connection (when not behind a proxy)
+    if request.client and request.client.host:
+        return request.client.host
+
+    # Last resort: check scope
+    if isinstance(request.scope, dict):
+        client_info = request.scope.get("client")
+        if isinstance(client_info, (list, tuple)) and client_info:
+            return client_info[0]
+
+    return None

backend/validation.py

@@ -3,7 +3,17 @@ import re
 def is_valid_username(username: str) -> bool:
     if len(username) < 3 or len(username) > 20:
         return False
-    if re.search(r'[\s\u180E\u200B-\u200D\u2060\uFEFF]', username):
+    # Only allow English letters, numbers, dashes and underscores
+    if not re.match(r'^[a-zA-Z0-9_-]+$', username):
+        return False
+    return True
+
+
+def is_valid_display_name(display_name: str) -> bool:
+    if len(display_name) < 1 or len(display_name) > 64:
+        return False
+    # Check if not blank (only whitespace)
+    if not display_name.strip():
         return False
     return True
 

deployment/.dockerignore

@@ -31,3 +31,4 @@ test_results/
 out
 
 data
+logs

deployment/.env.example

@@ -1 +0,0 @@
-JWT_SECRET="jwt-secret-change-in-production"

deployment/Dockerfile.backend

@@ -14,12 +14,16 @@ FROM python:3.12-slim AS runtime
 WORKDIR /app
 RUN useradd -u 1000 app && \
     chown -R app /app
-USER app
 
 # 2.2. Copy content and create dirs
 COPY --chown=app backend .
 COPY --from=builder --chown=app /app/.venv .venv
-RUN mkdir -p /app/data
+RUN mkdir -p /app/data /app/logs && \
+    chown -R app /app/data /app/logs && \
+    printf '#!/bin/sh\nexec /app/.venv/bin/python /app/admin_cli.py "$@"\n' > /usr/local/bin/admin-cli && \
+    chmod +x /usr/local/bin/admin-cli
+
+USER app
 
 # 3. Final command
 ENTRYPOINT exec ./.venv/bin/fastapi run --port ${PORT:-8300} main.py

deployment/caddy/Caddyfile

@@ -0,0 +1,88 @@
+fromchat.ru {
+	reverse_proxy 172.18.0.1:8301 host.docker.internal:8301 172.17.0.1:8301 {
+		lb_policy first
+        header_up X-Real-IP {remote_host}
+	}
+
+	# Security headers
+	header {
+		X-XSS-Protection "1; mode=block" # Prevent XSS attacks
+		X-Content-Type-Options "nosniff" # Prevent MIME type sniffing
+		X-Frame-Options "DENY" # Prevent clickjacking
+		Referrer-Policy "strict-origin-when-cross-origin"
+		Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';"
+		Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
+		Permissions-Policy "geolocation=(), microphone=(self), camera=(self)"
+	}
+
+	rate_limit {
+		zone global {
+			key {remote_ip}
+			window 1m
+			burst 20
+			events 500
+		}
+	}
+
+	handle_errors {
+		@errors {
+			expression {err.status_code} >= 400
+		}
+
+		handle @errors {
+			rewrite * /{err.status_code}
+			reverse_proxy https://http.cat {
+				header_up Host {upstream_hostport}
+				replace_status {err.status_code}
+			}
+		}
+	}
+}
+
+beta.fromchat.ru {
+    reverse_proxy 95.165.0.162:8301 {
+        header_up X-Real-IP {remote_host}
+    }
+
+	# Security headers
+	header {
+		X-XSS-Protection "1; mode=block" # Prevent XSS attacks
+		X-Content-Type-Options "nosniff" # Prevent MIME type sniffing
+		X-Frame-Options "DENY" # Prevent clickjacking
+		Referrer-Policy "strict-origin-when-cross-origin"
+		Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';"
+		Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
+		Permissions-Policy "geolocation=(), microphone=(self), camera=(self)"
+	}
+
+	rate_limit {
+		zone global {
+			key {remote_ip}
+			window 1m
+			burst 20
+			events 1000
+		}
+	}
+
+	handle_errors {
+		@errors {
+			expression {err.status_code} >= 400
+		}
+
+		handle @errors {
+			rewrite * /{err.status_code}
+			reverse_proxy https://http.cat {
+				header_up Host {upstream_hostport}
+				replace_status {err.status_code}
+			}
+		}
+	}
+}
+
+api.getgadgets.toolbox-io.ru {
+    reverse_proxy 95.165.0.162:8400
+}
+
+getgadgets.toolbox-io.ru {
+    reverse_proxy 95.165.0.162:8401
+}

deployment/caddy/Dockerfile

@@ -0,0 +1,13 @@
+#
+# Custom Caddy built with:
+# - Rate limit plugin
+#
+
+FROM caddy:2-builder AS builder
+RUN xcaddy build \
+      --with github.com/mholt/caddy-ratelimit
+
+FROM caddy:2
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+COPY Caddyfile /etc/caddy/Caddyfile

deployment/db-init/01-init-roles.sql

@@ -0,0 +1,70 @@
+-- Initialize database roles and schemas for FromChat microservices
+-- This script creates dedicated users with limited privileges for each service
+
+-- Create service-specific database roles with limited privileges
+-- All services use the same password
+CREATE ROLE account_service_user LOGIN PASSWORD 'development';
+CREATE ROLE profile_service_user LOGIN PASSWORD 'development';
+CREATE ROLE device_service_user LOGIN PASSWORD 'development';
+CREATE ROLE messaging_service_user LOGIN PASSWORD 'development';
+CREATE ROLE push_service_user LOGIN PASSWORD 'development';
+CREATE ROLE webrtc_service_user LOGIN PASSWORD 'development';
+CREATE ROLE moderation_service_user LOGIN PASSWORD 'development';
+CREATE ROLE gateway_user LOGIN PASSWORD 'development';
+
+-- Create dedicated schemas for each service
+CREATE SCHEMA IF NOT EXISTS account_schema AUTHORIZATION account_service_user;
+CREATE SCHEMA IF NOT EXISTS profile_schema AUTHORIZATION profile_service_user;
+CREATE SCHEMA IF NOT EXISTS device_schema AUTHORIZATION device_service_user;
+CREATE SCHEMA IF NOT EXISTS messaging_schema AUTHORIZATION messaging_service_user;
+CREATE SCHEMA IF NOT EXISTS push_schema AUTHORIZATION push_service_user;
+CREATE SCHEMA IF NOT EXISTS webrtc_schema AUTHORIZATION webrtc_service_user;
+CREATE SCHEMA IF NOT EXISTS moderation_schema AUTHORIZATION moderation_service_user;
+
+-- Grant basic connection privileges
+GRANT CONNECT ON DATABASE fromchat TO account_service_user, profile_service_user, device_service_user, messaging_service_user, push_service_user, webrtc_service_user, moderation_service_user;
+
+-- Grant schema-level privileges (limited to each service's schema)
+-- Account service
+GRANT USAGE ON SCHEMA account_schema TO account_service_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA account_schema TO account_service_user;
+GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA account_schema TO account_service_user;
+
+-- Profile service
+GRANT USAGE ON SCHEMA profile_schema TO profile_service_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA profile_schema TO profile_service_user;
+GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA profile_schema TO profile_service_user;
+
+-- Device service
+GRANT USAGE ON SCHEMA device_schema TO device_service_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA device_schema TO device_service_user;
+GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA device_schema TO device_service_user;
+
+-- Messaging service
+GRANT USAGE ON SCHEMA messaging_schema TO messaging_service_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA messaging_schema TO messaging_service_user;
+GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA messaging_schema TO messaging_service_user;
+
+-- Push service
+GRANT USAGE ON SCHEMA push_schema TO push_service_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA push_schema TO push_service_user;
+GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA push_schema TO push_service_user;
+
+-- WebRTC service
+GRANT USAGE ON SCHEMA webrtc_schema TO webrtc_service_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA webrtc_schema TO webrtc_service_user;
+GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA webrtc_schema TO webrtc_service_user;
+
+-- Moderation service
+GRANT USAGE ON SCHEMA moderation_schema TO moderation_service_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA moderation_schema TO moderation_service_user;
+GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA moderation_schema TO moderation_service_user;
+
+-- Set default privileges for future objects
+ALTER DEFAULT PRIVILEGES IN SCHEMA account_schema GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO account_service_user;
+ALTER DEFAULT PRIVILEGES IN SCHEMA profile_schema GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO profile_service_user;
+ALTER DEFAULT PRIVILEGES IN SCHEMA device_schema GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO device_service_user;
+ALTER DEFAULT PRIVILEGES IN SCHEMA messaging_schema GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO messaging_service_user;
+ALTER DEFAULT PRIVILEGES IN SCHEMA push_schema GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO push_service_user;
+ALTER DEFAULT PRIVILEGES IN SCHEMA webrtc_schema GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO webrtc_service_user;
+ALTER DEFAULT PRIVILEGES IN SCHEMA moderation_schema GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO moderation_service_user;

deployment/db-init/02-init-tables.sql

@@ -0,0 +1,158 @@
+-- Create tables for FromChat microservices
+-- This script creates the necessary tables in their respective schemas
+
+-- Note: In production, tables will be created by Alembic migrations
+-- This script provides a fallback or reference for manual setup
+
+-- Account schema tables
+CREATE TABLE IF NOT EXISTS account_schema.users (
+    id BIGSERIAL PRIMARY KEY,
+    username VARCHAR(50) UNIQUE NOT NULL,
+    hashed_password VARCHAR(255) NOT NULL,
+    salt VARCHAR(64) NOT NULL,
+    display_name VARCHAR(100),
+    bio TEXT,
+    avatar_url VARCHAR(255),
+    is_online BOOLEAN DEFAULT FALSE,
+    last_seen TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    verified BOOLEAN DEFAULT FALSE,
+    verification_token VARCHAR(255),
+    reset_token VARCHAR(255),
+    reset_token_expires TIMESTAMP,
+    two_factor_enabled BOOLEAN DEFAULT FALSE,
+    two_factor_secret VARCHAR(255),
+    login_attempts INTEGER DEFAULT 0,
+    locked_until TIMESTAMP,
+    public_key TEXT,
+    private_key TEXT,
+    encryption_enabled BOOLEAN DEFAULT FALSE,
+    suspended BOOLEAN DEFAULT FALSE,
+    suspension_reason TEXT,
+    deleted BOOLEAN DEFAULT FALSE
+);
+
+-- Profile schema tables (references account_schema.users)
+CREATE TABLE IF NOT EXISTS profile_schema.user_profiles (
+    user_id BIGINT PRIMARY KEY REFERENCES account_schema.users(id) ON DELETE CASCADE,
+    display_name VARCHAR(100),
+    bio TEXT,
+    avatar_url VARCHAR(255),
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Device schema tables
+CREATE TABLE IF NOT EXISTS device_schema.devices (
+    id BIGSERIAL PRIMARY KEY,
+    user_id BIGINT REFERENCES account_schema.users(id) ON DELETE CASCADE,
+    device_id VARCHAR(255) UNIQUE NOT NULL,
+    device_name VARCHAR(255),
+    device_type VARCHAR(50),
+    public_key TEXT,
+    signed_prekey TEXT,
+    one_time_prekeys JSONB,
+    last_active TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS device_schema.device_session (
+    id SERIAL PRIMARY KEY,
+    user_id BIGINT REFERENCES account_schema.users(id) ON DELETE CASCADE,
+    raw_user_agent TEXT,
+    device_name VARCHAR(128),
+    device_type VARCHAR(32),
+    os_name VARCHAR(64),
+    os_version VARCHAR(64),
+    browser_name VARCHAR(64),
+    browser_version VARCHAR(64),
+    brand VARCHAR(64),
+    model VARCHAR(64),
+    session_id VARCHAR(64) UNIQUE NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    last_seen TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    revoked BOOLEAN DEFAULT FALSE
+);
+
+-- Messaging schema tables
+CREATE TABLE IF NOT EXISTS messaging_schema.messages (
+    id BIGSERIAL PRIMARY KEY,
+    sender_id BIGINT REFERENCES account_schema.users(id) ON DELETE CASCADE,
+    content TEXT NOT NULL,
+    content_type VARCHAR(50) DEFAULT 'text',
+    encrypted_content TEXT,
+    signature TEXT,
+    timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    edited_at TIMESTAMP,
+    edited BOOLEAN DEFAULT FALSE,
+    deleted BOOLEAN DEFAULT FALSE,
+    reply_to_id BIGINT REFERENCES messaging_schema.messages(id),
+    thread_id BIGINT REFERENCES messaging_schema.messages(id),
+    is_public BOOLEAN DEFAULT FALSE
+);
+
+CREATE TABLE IF NOT EXISTS messaging_schema.message_recipients (
+    id BIGSERIAL PRIMARY KEY,
+    message_id BIGINT REFERENCES messaging_schema.messages(id) ON DELETE CASCADE,
+    recipient_id BIGINT REFERENCES account_schema.users(id) ON DELETE CASCADE,
+    read_at TIMESTAMP,
+    delivered_at TIMESTAMP,
+    encrypted_key TEXT
+);
+
+CREATE TABLE IF NOT EXISTS messaging_schema.message_reactions (
+    id BIGSERIAL PRIMARY KEY,
+    message_id BIGINT REFERENCES messaging_schema.messages(id) ON DELETE CASCADE,
+    user_id BIGINT REFERENCES account_schema.users(id) ON DELETE CASCADE,
+    reaction VARCHAR(50) NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Push schema tables
+CREATE TABLE IF NOT EXISTS push_schema.push_subscriptions (
+    id BIGSERIAL PRIMARY KEY,
+    user_id BIGINT REFERENCES account_schema.users(id) ON DELETE CASCADE,
+    device_id BIGINT REFERENCES device_schema.devices(id),
+    endpoint VARCHAR(500) NOT NULL,
+    p256dh VARCHAR(255) NOT NULL,
+    auth VARCHAR(255) NOT NULL,
+    user_agent VARCHAR(500),
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- WebRTC schema tables
+CREATE TABLE IF NOT EXISTS webrtc_schema.webrtc_sessions (
+    id BIGSERIAL PRIMARY KEY,
+    session_id VARCHAR(255) UNIQUE NOT NULL,
+    initiator_id BIGINT REFERENCES account_schema.users(id),
+    participant_ids JSONB NOT NULL,
+    offer JSONB,
+    answer JSONB,
+    ice_candidates JSONB,
+    status VARCHAR(50) DEFAULT 'pending',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Moderation schema tables
+CREATE TABLE IF NOT EXISTS moderation_schema.moderation_actions (
+    id BIGSERIAL PRIMARY KEY,
+    moderator_id BIGINT REFERENCES account_schema.users(id),
+    target_user_id BIGINT REFERENCES account_schema.users(id),
+    target_message_id BIGINT REFERENCES messaging_schema.messages(id),
+    action_type VARCHAR(50) NOT NULL,
+    reason TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    expires_at TIMESTAMP
+);
+
+-- Grant permissions on sequences (after all tables are created)
+GRANT USAGE ON SEQUENCE account_schema.users_id_seq TO account_service_user;
+GRANT USAGE ON SEQUENCE device_schema.devices_id_seq TO device_service_user;
+GRANT USAGE ON SEQUENCE device_schema.device_session_id_seq TO account_service_user;
+GRANT USAGE ON SEQUENCE messaging_schema.messages_id_seq TO messaging_service_user;
+GRANT USAGE ON SEQUENCE messaging_schema.message_recipients_id_seq TO messaging_service_user;
+GRANT USAGE ON SEQUENCE messaging_schema.message_reactions_id_seq TO messaging_service_user;
+GRANT USAGE ON SEQUENCE push_schema.push_subscriptions_id_seq TO push_service_user;
+GRANT USAGE ON SEQUENCE webrtc_schema.webrtc_sessions_id_seq TO webrtc_service_user;
+GRANT USAGE ON SEQUENCE moderation_schema.moderation_actions_id_seq TO moderation_service_user;

deployment/docker-compose.yml

@@ -1,52 +1,368 @@
 services:
-  backend:
-    build: 
-      dockerfile: deployment/Dockerfile.backend
-      context: ..
+  # Database service
+  database:
+    image: postgres:15
     environment:
-      PORT: 8300
-      JWT_SECRET: ${JWT_SECRET}
+      POSTGRES_DB: fromchat
+      POSTGRES_USER: fromchat_admin
+      POSTGRES_PASSWORD: ${DB_PASSWORD}
     volumes:
-      - "data:/app/data"
+      - database:/var/lib/postgresql/data
+      - ./db-init:/docker-entrypoint-initdb.d
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U fromchat_admin -d fromchat"]
+      interval: 1s
+      timeout: 5s
+      retries: 5
+
+  # Migration runner - runs once before other services
+  migration_runner:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: migration_runner
+    environment:
+      DATABASE_URL: postgresql://fromchat_admin:${DB_PASSWORD}@database:5432/fromchat
+      JWT_SECRET: ${JWT_SECRET}
+    depends_on:
+      database:
+        condition: service_healthy
+    networks:
+      - fromchat_internal
     develop:
       watch:
+        - action: sync
+          path: backend/alembic.ini
+          target: /app/backend/alembic.ini
+        - action: sync
+          path: backend/alembic
+          target: /app/backend/alembic
+        - action: sync
+          path: backend/migration.py
+          target: /app/backend/migration.py
+        - action: sync
+          path: backend/services/migration_runner
+          target: /app/backend/services/migration_runner
         - action: sync+restart
-          path: ../backend
-          target: /app
-        - action: rebuild
-          path: ../backend/requirements.txt
-    networks:
-      - main
+          path: backend/shared
+          target: /app/backend/shared
 
+  # Gateway service - handles complex operations
+  gateway:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: gateway
+    ports: ["8300:8300"]
+    environment:
+      DATABASE_URL: postgresql://gateway_user:${DB_PASSWORD}@database:5432/fromchat
+      PORT: 8300
+      ACCOUNT_SERVICE_URL: http://account_service:8302
+      PROFILE_SERVICE_URL: http://profile_service:8303
+      DEVICE_SERVICE_URL: http://device_service:8304
+      MESSAGING_SERVICE_URL: http://messaging_service:8305
+      PUSH_SERVICE_URL: http://push_service:8306
+      WEBRTC_SERVICE_URL: http://webrtc_service:8307
+      MODERATION_SERVICE_URL: http://moderation_service:8308
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+      - fromchat_external
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/app.py
+          target: /app/backend/app.py
+        - action: sync
+          path: backend/main.py
+          target: /app/backend/main.py
+        - action: sync
+          path: backend/dependencies.py
+          target: /app/backend/dependencies.py
+        - action: sync
+          path: backend/security
+          target: /app/backend/security
+        - action: sync
+          path: backend/services/gateway
+          target: /app/backend/services/gateway
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # Account service
+  account_service:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: account_service
+    environment:
+      DATABASE_URL: postgresql://account_service_user:${DB_PASSWORD}@database:5432/fromchat
+      JWT_SECRET: ${JWT_SECRET}
+      PORT: 8302
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/routes/account.py
+          target: /app/backend/routes/account.py
+        - action: sync
+          path: backend/services/account
+          target: /app/backend/services/account
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # Profile service
+  profile_service:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: profile_service
+    environment:
+      DATABASE_URL: postgresql://profile_service_user:${DB_PASSWORD}@database:5432/fromchat
+      FIREBASE_CERT: ${FIREBASE_CERT}
+      VAPID_PRIVATE_KEY: ${VAPID_PRIVATE_KEY}
+      VAPID_PUBLIC_KEY: ${VAPID_PUBLIC_KEY}
+      VAPID_SUBJECT: ${VAPID_SUBJECT}
+      MESSAGING_SERVICE_URL: http://messaging_service:8305
+      PORT: 8303
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/routes/profile.py
+          target: /app/backend/routes/profile.py
+        - action: sync
+          path: backend/services/profile
+          target: /app/backend/services/profile
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # Device service
+  device_service:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: device_service
+    environment:
+      DATABASE_URL: postgresql://device_service_user:${DB_PASSWORD}@database:5432/fromchat
+      PORT: 8304
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/routes/devices.py
+          target: /app/backend/routes/devices.py
+        - action: sync
+          path: backend/services/device
+          target: /app/backend/services/device
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # Messaging service
+  messaging_service:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: messaging_service
+    ports:
+      - "8305:8305"
+    environment:
+      DATABASE_URL: postgresql://messaging_service_user:${DB_PASSWORD}@database:5432/fromchat
+      FIREBASE_CERT: ${FIREBASE_CERT}
+      VAPID_PRIVATE_KEY: ${VAPID_PRIVATE_KEY}
+      VAPID_PUBLIC_KEY: ${VAPID_PUBLIC_KEY}
+      VAPID_SUBJECT: ${VAPID_SUBJECT}
+      PUSH_SERVICE_URL: http://push_service:8306
+      PORT: 8305
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/routes/messaging.py
+          target: /app/backend/routes/messaging.py
+        - action: sync
+          path: backend/websocket
+          target: /app/backend/websocket
+        - action: sync
+          path: backend/services/messaging
+          target: /app/backend/services/messaging
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # Push service
+  push_service:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: push_service
+    environment:
+      DATABASE_URL: postgresql://push_service_user:${DB_PASSWORD}@database:5432/fromchat
+      FIREBASE_CERT: ${FIREBASE_CERT}
+      VAPID_PRIVATE_KEY: ${VAPID_PRIVATE_KEY}
+      VAPID_PUBLIC_KEY: ${VAPID_PUBLIC_KEY}
+      VAPID_SUBJECT: ${VAPID_SUBJECT}
+      PORT: 8306
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/routes/push.py
+          target: /app/backend/routes/push.py
+        - action: sync
+          path: backend/push_service.py
+          target: /app/backend/push_service.py
+        - action: sync
+          path: backend/services/push
+          target: /app/backend/services/push
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # WebRTC service
+  webrtc_service:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: webrtc_service
+    environment:
+      DATABASE_URL: postgresql://webrtc_service_user:${DB_PASSWORD}@database:5432/fromchat
+      PORT: 8307
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/routes/webrtc.py
+          target: /app/backend/routes/webrtc.py
+        - action: sync
+          path: backend/services/webrtc
+          target: /app/backend/services/webrtc
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # Moderation service
+  moderation_service:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.multi
+      target: moderation_service
+    environment:
+      DATABASE_URL: postgresql://moderation_service_user:${DB_PASSWORD}@database:5432/fromchat
+      PORT: 8308
+    depends_on:
+      migration_runner:
+        condition: service_completed_successfully
+    networks:
+      - fromchat_internal
+    restart: unless-stopped
+    develop:
+      watch:
+        - action: sync
+          path: backend/routes/moderation.py
+          target: /app/backend/routes/moderation.py
+        - action: sync
+          path: backend/security
+          target: /app/backend/security
+        - action: sync
+          path: backend/similarity.py
+          target: /app/backend/similarity.py
+        - action: sync
+          path: backend/services/moderation
+          target: /app/backend/services/moderation
+        - action: sync+restart
+          path: backend/shared
+          target: /app/backend/shared
+
+  # Caddy reverse proxy
+  caddy:
+    build:
+      context: ./caddy
+      dockerfile: Dockerfile
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - certs:/root/site/certs
+    networks:
+      - fromchat_external
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    environment:
+      - XDG_DATA_HOME=/root/site/certs
+      - XDG_CONFIG_HOME=/root/site/certs
+    restart: unless-stopped
+    depends_on:
+      - gateway
+    profiles: ["prod"]
+
+  # Frontend service - serves the React app
   frontend:
     build:
-      dockerfile: deployment/frontend/Dockerfile
       context: ..
-    environment:
-      PORT: 8301
-      BACKEND_HOST: http://backend:8300
+      dockerfile: deployment/frontend/Dockerfile
     ports:
       - "8301:8301"
-    depends_on:
-      - backend
-    develop:
-      watch:
-        - action: rebuild
-          path: ../frontend
-        - action: sync+restart
-          path: server.js
-          target: /server/server.js
-        - action: rebuild
-          path: package.json
+    environment:
+      - PORT=8301
+      - BACKEND_HOST=http://gateway:8300
+    restart: unless-stopped
     networks:
-      - main
-      - default
+      - fromchat_external
+      - fromchat_internal
 
 volumes:
+  database:
+    name: fromchat-database
+  certs:
+    name: fromchat-certs
+  logs:
+    name: fromchat-logs
   data:
     name: fromchat-data
 
 networks:
-  main:
+  fromchat_internal:
+    driver: bridge
+    internal: true
+  fromchat_external:
     driver: bridge
-    internal: true # isolate from the outside world

deployment/frontend/Dockerfile

@@ -3,14 +3,17 @@ FROM node:24 AS frontend
 
 # 1.1. Install npm dependencies
 WORKDIR /app
+# Copy package.json and workspace package directory first (needed for workspace resolution)
 COPY package.json .
+COPY frontend/packages/ frontend/packages/
 RUN --mount=type=cache,target=/root/.npm \
     npm install --ignore-scripts
 
-# 1.2. Build
+# 1.2. Copy remaining frontend code and build
 COPY frontend frontend
 RUN npm run frontend:build
 
+
 # 2. Build the static file server
 FROM node:24 AS server
 
@@ -23,6 +26,10 @@ RUN --mount=type=cache,target=/root/.npm \
 # 2.2. Copy the code
 COPY deployment/frontend/ .
 
+# 2.3. Build
+RUN npm run build
+
+
 # 3. Put it all together
 FROM node:24-slim
 
@@ -36,7 +43,7 @@ USER app
 
 # 3.1. Frontend static files
 WORKDIR /app
-COPY --from=frontend --chown=app /app/frontend/dist .
+COPY --from=frontend --chown=app /app/frontend/build/normal/dist .
 
 # 3.2. Static file server
 WORKDIR /server
@@ -44,4 +51,4 @@ COPY --from=server --chown=app /server .
 
 # 4. Final command
 ENV STATIC_FILE_PATH=/app
-ENTRYPOINT ["npm", "run", "start"]
+ENTRYPOINT ["npm", "run", "start:prod"]

deployment/frontend/package.json

@@ -3,10 +3,18 @@
     "version": "1.0.0",
     "main": "server.js",
     "scripts": {
-        "start": "node server.js"
+        "start": "ts-node server.ts",
+        "build": "tsc -b",
+        "start:prod": "node dist/server.js"
     },
     "dependencies": {
         "express": "^5.1.0",
         "http-proxy-middleware": "^3.0.5"
+    },
+    "devDependencies": {
+        "@types/express": "^4.17.21",
+        "@types/node": "^20.10.0",
+        "typescript": "^5.3.0",
+        "ts-node": "^10.9.0"
     }
 }

deployment/frontend/server.js

@@ -1,22 +0,0 @@
-// server.js
-const express = require('express');
-const { createProxyMiddleware } = require('http-proxy-middleware');
-const path = require('path');
-
-const app = express();
-const port = process.env.PORT || 3000;
-const backendHost = process.env.BACKEND_HOST || "http://localhost:8300";
-const file_path = process.env.STATIC_FILE_PATH || ".";
-
-app.use('/api', createProxyMiddleware({
-    target: backendHost,
-    changeOrigin: true,
-    pathRewrite: { '^/api': '' },
-    ws: true
-}));
-
-app.use(express.static(path.resolve(file_path)));
-
-app.listen(port, () => {
-    console.log(`Server launched на http://localhost:${port}`);
-});

deployment/frontend/server.ts

@@ -0,0 +1,44 @@
+import express from 'express';
+import type { Request, Response } from 'express';
+import { createProxyMiddleware } from 'http-proxy-middleware';
+import { resolve } from 'path';
+
+const app = express();
+const port = Number(process.env.PORT) || 8301;
+const backendHost = process.env.BACKEND_HOST || "http://localhost:8300";
+const filePath = process.env.STATIC_FILE_PATH || ".";
+
+// Direct WebSocket proxy for chat - bypass gateway (must come before general API proxy)
+app.use('/api/chat/ws', createProxyMiddleware({
+    target: 'http://messaging_service:8305',
+    changeOrigin: true,
+    pathRewrite: { '^/api/chat/ws': '/messaging/chat/ws' },
+    ws: true
+}));
+
+// API proxy middleware (exclude WebSocket paths)
+app.use('/api', (req, res, next) => {
+    // Skip WebSocket upgrade requests - let them be handled by specific proxies
+    if (req.headers.upgrade === 'websocket') {
+        return next();
+    }
+    createProxyMiddleware({
+        target: backendHost,
+        changeOrigin: true,
+        pathRewrite: { '^/api': '' },
+        ws: true
+    })(req, res, next);
+});
+
+// Serve static files
+app.use(express.static(resolve(filePath)));
+
+// SPA routing - catch all handler for client-side routing
+app.use((_req: Request, res: Response) => {
+    res.sendFile(resolve(filePath, 'index.html'));
+});
+
+app.listen(port, '0.0.0.0', () => {
+    console.log(`Backend host: ${backendHost}`);
+    console.log(`Server launched on http://0.0.0.0:${port}`);
+});

deployment/frontend/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "target": "ES2020",
+        "module": "commonjs",
+        "moduleResolution": "node",
+        "esModuleInterop": true,
+        "allowSyntheticDefaultImports": true,
+        "strict": true,
+        "skipLibCheck": true,
+        "forceConsistentCasingInFileNames": true,
+        "outDir": "./dist",
+        "rootDir": "./",
+        "declaration": true,
+        "sourceMap": true
+    },
+    "include": [
+        "server.ts"
+    ],
+    "exclude": [
+        "node_modules",
+        "dist"
+    ]
+}

docker/Dockerfile.multi

@@ -0,0 +1,123 @@
+# Multi-stage Dockerfile for all FromChat microservices
+# This combines the base image and all services in one file
+
+# Base stage - common setup for all services
+FROM python:3.11-slim AS base
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    libpq5 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user
+RUN useradd --create-home --shell /bin/bash fromchat
+
+# Set working directory
+WORKDIR /app
+
+# Create logs and data directories with proper permissions
+RUN mkdir -p /app/backend/logs /app/backend/data /app/backend/data/profanity /app/backend/data/uploads /app/backend/data/uploads/pfp && \
+    chown -R fromchat:fromchat /app/backend/logs /app/backend/data && \
+    chmod -R 755 /app/backend/logs /app/backend/data
+
+# Copy requirements first for better caching
+COPY backend/requirements.txt /app/requirements.txt
+
+# Install Python dependencies with cache mounts
+RUN --mount=type=cache,target=/home/fromchat/.cache/pip \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy shared modules
+COPY backend/shared /app/backend/shared/
+
+# Copy entrypoint script
+COPY docker/entrypoint.sh /app/entrypoint.sh
+RUN chmod +x /app/entrypoint.sh
+
+# Switch to non-root user
+USER fromchat
+
+# Set entrypoint
+ENTRYPOINT ["/app/entrypoint.sh"]
+
+# Account service - minimal files only
+FROM base AS account_service
+COPY backend/routes/account.py /app/backend/routes/account.py
+COPY backend/security /app/backend/security/
+COPY backend/logging_config.py /app/backend/logging_config.py
+COPY backend/services/account/main.py /app/backend/services/account/main.py
+ENV SERVICE_NAME=account
+
+# Profile service - minimal files only
+FROM base AS profile_service
+COPY backend/routes/profile.py /app/backend/routes/profile.py
+COPY backend/routes/messaging.py /app/backend/routes/messaging.py
+COPY backend/services/push/files/push_service.py /app/backend/services/push/files/push_service.py
+COPY backend/security /app/backend/security/
+COPY backend/logging_config.py /app/backend/logging_config.py
+COPY backend/services/messaging/files/websocket /app/backend/services/messaging/files/websocket/
+COPY backend/shared/similarity.py /app/backend/shared/similarity.py
+COPY backend/services/profile/main.py /app/backend/services/profile/main.py
+ENV SERVICE_NAME=profile
+
+# Device service - minimal files only
+FROM base AS device_service
+COPY backend/routes/devices.py /app/backend/routes/devices.py
+COPY backend/services/device/main.py /app/backend/services/device/main.py
+ENV SERVICE_NAME=device
+
+# Messaging service - minimal files only
+FROM base AS messaging_service
+COPY backend/routes/messaging.py /app/backend/routes/messaging.py
+COPY backend/services/push/files/push_service.py /app/backend/services/push/files/push_service.py
+COPY backend/security /app/backend/security/
+COPY backend/logging_config.py /app/backend/logging_config.py
+COPY backend/services/messaging/files/websocket /app/backend/services/messaging/files/websocket/
+COPY backend/services/messaging/main.py /app/backend/services/messaging/main.py
+ENV SERVICE_NAME=messaging
+
+# Push service - minimal files only
+FROM base AS push_service
+COPY backend/routes/push.py /app/backend/routes/push.py
+COPY backend/services/push/files/push_service.py /app/backend/services/push/files/push_service.py
+COPY backend/services/push/main.py /app/backend/services/push/main.py
+ENV SERVICE_NAME=push
+
+# WebRTC service - minimal files only
+FROM base AS webrtc_service
+COPY backend/routes/webrtc.py /app/backend/routes/webrtc.py
+COPY backend/services/webrtc/main.py /app/backend/services/webrtc/main.py
+ENV SERVICE_NAME=webrtc
+
+# Moderation service - minimal files only
+FROM base AS moderation_service
+COPY backend/routes/moderation.py /app/backend/routes/moderation.py
+COPY backend/security /app/backend/security/
+COPY backend/shared/similarity.py /app/backend/shared/similarity.py
+COPY backend/logging_config.py /app/backend/logging_config.py
+COPY backend/services/moderation/main.py /app/backend/services/moderation/main.py
+ENV SERVICE_NAME=moderation
+
+# Gateway service - minimal files only
+FROM base AS gateway
+COPY backend/app.py /app/backend/app.py
+COPY backend/main.py /app/backend/main.py
+COPY backend/dependencies.py /app/backend/dependencies.py
+COPY backend/logging_config.py /app/backend/logging_config.py
+COPY backend/security /app/backend/security/
+COPY backend/services/gateway/main.py /app/backend/services/gateway/main.py
+ENV SERVICE_NAME=gateway
+
+# Migration runner - needs alembic config and migration files
+FROM base AS migration_runner
+# Temporarily switch back to root to manage file permissions
+USER root
+COPY backend/alembic.ini /app/backend/alembic.ini
+COPY backend/alembic /app/backend/alembic/
+COPY backend/migration.py /app/backend/migration.py
+COPY backend/services/migration_runner/main.py /app/backend/services/migration_runner/main.py
+# Clean up problematic migrations as root
+RUN find /app/backend/alembic/versions -name "*auto_generated_migration_for_schema_*" | xargs rm -f || true
+# Switch back to fromchat user
+USER fromchat
+ENV SERVICE_NAME=migration_runner

docker/entrypoint.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+# Entrypoint script for FromChat microservices
+
+# Run the service module
+exec python -m backend.services.${SERVICE_NAME}.main

frontend/electron.d.ts

@@ -1,8 +1,21 @@
 export type Platform = "win32" | "darwin" | "linux"
 
+export interface NotificationShowOptions {
+    title: string;
+    body: string;
+    icon?: string;
+    tag?: string;
+}
+
+export interface ElectronNotifications {
+    requestPermission: () => Promise<NotificationPermission>;
+    show: (options: NotificationShowOptions) => Promise<boolean>;
+}
+
 export interface ElectronInterface {
     desktop: true,
-    platform: Platform
+    platform: Platform,
+    notifications: ElectronNotifications
 }
 
 declare global {

frontend/electron/forge/index.html

@@ -1,13 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset="UTF-8" />
-    <title>Hello World!</title>
-
-  </head>
-  <body>
-    <h1>💖 Hello World!</h1>
-    <p>Welcome to your Electron application.</p>
-    <script type="module" src="/src/renderer.js"></script>
-  </body>
-</html>

frontend/electron/forge/package.json

@@ -1,33 +0,0 @@
-{
-    "name": "FromChat",
-    "productName": "FromChat",
-    "version": "1.0.0",
-    "description": "A 100% Open Source Messenger",
-    "main": "dist-electron/main.js",
-    "scripts": {
-        "package": "electron-forge package",
-        "make": "electron-forge make",
-        "publish": "electron-forge publish"
-    },
-    "keywords": [],
-    "author": {
-        "name": "denis0001-dev",
-        "email": "denis0001.dev@ya.ru"
-    },
-    "license": "GPL-2.0",
-    "devDependencies": {
-        "@electron-forge/cli": "^7.8.3",
-        "@electron-forge/maker-deb": "^7.8.3",
-        "@electron-forge/maker-rpm": "^7.8.3",
-        "@electron-forge/maker-squirrel": "^7.8.3",
-        "@electron-forge/maker-zip": "^7.8.3",
-        "@electron-forge/plugin-auto-unpack-natives": "^7.8.3",
-        "@electron-forge/plugin-fuses": "^7.8.3",
-        "@electron/fuses": "^1.8.0",
-        "electron": "37.3.1",
-        "vite": "^5.4.19"
-    },
-    "dependencies": {
-        "electron-squirrel-startup": "^1.0.1"
-    }
-}

frontend/electron/main.ts

@@ -1,28 +1,65 @@
-import { app, BrowserWindow } from 'electron';
-import path from "node:path";
+import { app, BrowserWindow, Notification, ipcMain } from 'electron';
+import path from "path";
+import type { NotificationShowOptions } from '../electron.d.ts';
+
+let mainWindow: BrowserWindow | null = null;
 
 app.whenReady().then(() => {
-    const win = new BrowserWindow({
+    mainWindow = new BrowserWindow({
         title: 'Main window',
-        minWidth: 650,
+        minWidth: 800,
         minHeight: 420,
         webPreferences: {
             preload: path.join(import.meta.dirname, "preload.mjs")
         },
         titleBarStyle: "hidden",
-        ...(process.platform !== 'darwin' ? { titleBarOverlay: true } : {}),
         trafficLightPosition: {
             x: 16 - 4,
             y: 16 - 4
         },
         titleBarOverlay: process.platform !== "darwin"
-    })
+    });
 
-    // You can use `process.env.VITE_DEV_SERVER_URL` when the vite command is called `serve`
     if (process.env.VITE_DEV_SERVER_URL) {
-        win.loadURL(process.env.VITE_DEV_SERVER_URL)
+        mainWindow.loadURL(process.env.VITE_DEV_SERVER_URL);
     } else {
-        // Load your file
-        win.loadFile('dist/index.html');
+        mainWindow.loadFile('frontend/build/electron/dist/index.html');
     }
+
+    // Handle notification permission requests
+    ipcMain.handle('request-notification-permission', async () => {
+        if (Notification.isSupported()) {
+            return 'granted';
+        }
+        return 'denied';
+    });
+
+    // Handle showing notifications
+    ipcMain.handle('show-notification', async (event, options: NotificationShowOptions) => {
+        if (Notification.isSupported()) {
+            try {
+                const notification = new Notification({
+                    title: options.title,
+                    body: options.body,
+                    icon: options.icon,
+                    silent: false,
+                    urgency: 'normal'
+                });
+
+                notification.on('click', () => {
+                    if (mainWindow) {
+                        mainWindow.show();
+                        mainWindow.focus();
+                    }
+                });
+
+                notification.show();
+                return true;
+            } catch (error) {
+                console.error('Error creating notification:', error);
+                return false;
+            }
+        }
+        return false;
+    });
 });

frontend/electron/preload.ts

@@ -1,9 +1,11 @@
-import { contextBridge } from "electron";
+import { contextBridge, ipcRenderer } from "electron";
 import type { ElectronInterface, Platform } from "../electron";
 
-const electronInterface: ElectronInterface = {
+contextBridge.exposeInMainWorld("electronInterface", {
     desktop: true,
-    platform: process.platform as Platform
-}
-
-contextBridge.exposeInMainWorld("electronInterface", electronInterface);
+    platform: process.platform as Platform,
+    notifications: {
+        requestPermission: () => ipcRenderer.invoke('request-notification-permission'),
+        show: (options) => ipcRenderer.invoke('show-notification', options)
+    }
+} satisfies ElectronInterface);

frontend/forge.config.ts

@@ -1,29 +1,28 @@
 import { FusesPlugin } from '@electron-forge/plugin-fuses';
 import { FuseV1Options, FuseVersion } from '@electron/fuses';
-import type { ForgeConfig } from "@electron-forge/shared-types";
+import type { ForgeConfig } from '@electron-forge/shared-types';
 
-const config: ForgeConfig = {
+export default {
     packagerConfig: {
-        asar: true
+        asar: true,
     },
+    outDir: "frontend/build/electron/forge",
     rebuildConfig: {},
     makers: [
-        {
-            name: '@electron-forge/maker-squirrel',
-            config: {},
-        },
         {
             name: '@electron-forge/maker-zip',
             config: {},
-            platforms: ['darwin'],
+            platforms: ['win32', 'darwin'],
         },
         {
             name: '@electron-forge/maker-deb',
             config: {},
+            platforms: ['linux'],
         },
         {
             name: '@electron-forge/maker-rpm',
             config: {},
+            platforms: ['linux'],
         },
     ],
     plugins: [
@@ -43,6 +42,4 @@ const config: ForgeConfig = {
             [FuseV1Options.OnlyLoadAppFromAsar]: true,
         }),
     ],
-};
-
-export default config;
+} satisfies ForgeConfig;

frontend/index.html

@@ -4,417 +4,10 @@
         <meta charset="UTF-8" />
         <meta name="viewport" content="width=device-width, initial-scale=1.0" />
         <title>Loading...</title>
-        <link rel="icon" href="./src/images/logo.png" />
+        <link rel="icon" href="./src/images/logo.svg" />
     </head>
     <body>
-        <div id="electron-title-bar">
-            <div class="macos-padding"></div>
-            <div id="window-title"></div>
-            <!-- <div class="window-controls">
-                <mdui-button-icon icon="remove" id="window-minimize"></mdui-button-icon>
-                <mdui-button-icon icon="stack--outlined" id="window-restore" class="hidden"></mdui-button-icon>
-                <mdui-button-icon icon="ad--outlined" id="window-maximize"></mdui-button-icon>
-                <mdui-button-icon icon="close" id="window-close"></mdui-button-icon>
-            </div> -->
-        </div>
-        <div id="main-wrapper">
-            <!-- Login Form -->
-            <div id="login-form" class="auth-container">
-                <div class="auth-card fade-in">
-                    <div class="auth-header">
-                        <h2>
-                            <span class="material-symbols filled large">login</span> 
-                            Добро пожаловать!
-                        </h2>
-                        <p>Войдите в свой аккаунт</p>
-                    </div>
-                    <div class="auth-body">
-                        <div id="login-alerts"></div>
-                        
-                        <form id="login-form-element">
-                            <mdui-text-field
-                                label="Имя пользователя" 
-                                id="login-username" 
-                                name="username" 
-                                variant="outlined"
-                                icon="person--filled"
-                                autocomplete="username"
-                                required>
-                            </mdui-text-field>
-                            <mdui-text-field
-                                label="Пароль" 
-                                id="login-password" 
-                                name="password" 
-                                variant="outlined" 
-                                type="password" 
-                                toggle-password
-                                icon="password--filled"
-                                autocomplete="current-password"
-                                required>
-                            </mdui-text-field>
-
-                            <mdui-button type="submit">Войти</mdui-button>
-                        </form>
-                        
-                        <div class="text-center">
-                            <p>Ещё нет аккаунта? <a href="#" id="register-link" class="link">Зарегистрируйтесь</a></p>
-                        </div>
-                    </div>
-                </div>
-            </div>
-
-            <!-- Register Form -->
-            <div id="register-form" class="auth-container" style="display: none;">
-                <div class="auth-card fade-in">
-                    <div class="auth-header">
-                        <h2>
-                            <span class="material-symbols filled large">person_add</span> 
-                            Регистрация
-                        </h2>
-                        <p>Создайте новый аккаунт</p>
-                    </div>
-                    <div class="auth-body">
-                        <div id="register-alerts"></div>
-                        
-                        <form id="register-form-element">
-                            <mdui-text-field 
-                                label="Имя пользователя" 
-                                id="register-username" 
-                                name="username" 
-                                variant="outlined"
-                                icon="person--filled"
-                                autocomplete="username"
-                                maxlength="20"
-                                counter
-                                required>
-                            </mdui-text-field>
-                            <mdui-text-field 
-                                label="Пароль" 
-                                id="register-password" 
-                                name="password" 
-                                variant="outlined" 
-                                type="password" 
-                                toggle-password
-                                icon="password--filled"
-                                autocomplete="new-password"
-                                required>
-                            </mdui-text-field>
-                            <mdui-text-field 
-                                label="Подтвердите пароль" 
-                                id="register-confirm-password" 
-                                name="confirm_password" 
-                                variant="outlined" 
-                                type="password" 
-                                toggle-password
-                                icon="password--filled"
-                                autocomplete="new-password"
-                                required>
-                            </mdui-text-field>
-
-                            <mdui-button type="submit">Зарегистрироваться</mdui-button>
-                        </form>
-                        
-                        <div class="text-center">
-                            <p>
-                                Уже есть аккаунт? 
-                                <a href="#" id="login-link" class="link">Войдите</a>
-                            </p>
-                        </div>
-                    </div>
-                </div>
-            </div>
-
-            <!-- Chat Interface -->
-            <div id="chat-interface" style="display: none;">
-                <div class="all-container">
-                    <div class="chat-list" id="chat-list">
-                        <header class="chat-header-left">
-                            <div id="productname">Loading...</div> 
-                            <div class="profile">
-                                <a href="#" id="profile-open">
-                                    <img src="./src/images/default-avatar.png" alt="" id="preview1" />
-                                </a>
-                            </div>
-                        </header>
-                        <div class="chat-tabs">
-                            <mdui-tabs value="chats" full-width>
-                                <mdui-tab value="chats">
-                                    Чаты
-                                </mdui-tab>
-                                <mdui-tab value="channels">
-                                    Каналы
-                                </mdui-tab>
-                                <mdui-tab value="contacts">
-                                    Контакты
-                                </mdui-tab>
-
-                                <mdui-tab-panel slot="panel" value="chats">
-                                    <mdui-list>
-                                        <mdui-list-item headline="Общий чат" description="Вы: Последнее сообщение" id="chat-list-chat-1">
-                                            <img src="./src/images/default-avatar.png" alt="" slot="icon" />
-                                        </mdui-list-item>
-                                        <mdui-list-item headline="Общий чат 2" description="Вы: Последнее сообщение" id="chat-list-chat-2">
-                                            <img src="./src/images/default-avatar.png" alt="" slot="icon" />
-                                        </mdui-list-item>
-                                    </mdui-list>
-                                </mdui-tab-panel>
-                                <mdui-tab-panel slot="panel" value="channels">Скоро будет...</mdui-tab-panel>
-                                <mdui-tab-panel slot="panel" value="contacts">Скоро будет...</mdui-tab-panel>
-                            </mdui-tabs>
-                        </div>
-                        <mdui-bottom-app-bar>
-                            <mdui-button-icon icon="settings--filled" id="settings-open"></mdui-button-icon>
-                            <mdui-button-icon icon="group_add--filled"></mdui-button-icon>
-                            <div style="flex-grow: 1"></div>
-                            <mdui-fab icon="edit--filled"></mdui-fab>
-                        </mdui-bottom-app-bar>
-                    </div>
-                    <div class="chat-container">          
-                        <div class="chat-main" id="chat-inner">
-                            <div class="chat-header">
-                                <img src="src/images/default-avatar.png" alt="Avatar" class="chat-header-avatar">
-                                <div class="chat-header-info">
-                                    <div class="info-chat">
-                                        <h4 id="chat-name">Общий чат</h4>
-                                        <p>
-                                            <span class="online-status"></span>
-                                            Онлайн
-                                        </p>
-                                    </div>
-                                    <a href="#" id="hide-chat">Свернуть чат</a>
-                                </div>
-                            </div>
-                            
-                            <div class="chat-messages" id="chat-messages">
-                                <!-- Messages will be loaded here dynamically -->
-                            </div>
-                            
-                            <div class="chat-input-wrapper">
-                                <div class="chat-input">
-                                    <form class="input-group" id="message-form">
-                                        <input type="text" class="message-input" id="message-input" placeholder="Напишите сообщение..." autocomplete="off">
-                                        <button type="submit" class="send-btn">
-                                            <span class="material-symbols filled">send</span>
-                                        </button>
-                                    </form>
-                                </div>
-                            </div>
-                        </div>
-                    </div>
-                </div>
-            </div>
-        </div>
-
-        <mdui-dialog id="profile-dialog" close-on-overlay-click close-on-esc>
-            <div class="content">
-                <div class="header-top">
-                    <div class="profile-picture-container">
-                        <img id="profile-picture" src="./src/images/default-avatar.png" alt="Ваше фото" />
-                        <mdui-button-icon icon="camera_alt--filled" id="upload-pfp-btn" class="upload-overlay" variant="filled"></mdui-button-icon>
-                        <input type="file" id="pfp-file-input" accept="image/*" style="display: none;">
-                    </div>
-                    <mdui-text-field id="username-field" label="Имя пользователя" variant="outlined" value="user123" autocomplete="username"></mdui-text-field>
-                </div>
-
-                <form id="profile-form">
-                    <mdui-text-field 
-                        id="description-field"
-                        label="О себе" 
-                        variant="outlined" 
-                        multiline 
-                        rows="3" 
-                        placeholder="Расскажите о себе..."
-                        autocomplete="none"></mdui-text-field>
-                    <div class="dialog-actions">
-                        <mdui-button type="submit" id="profile-submit">Сохранить изменения</mdui-button>
-                        <mdui-button id="profile-dialog-close" variant="outlined">Закрыть</mdui-button>
-                    </div>
-                </div>
-            </div>
-        </mdui-dialog>
-
-        <!-- Profile Picture Cropper Dialog -->
-        <mdui-dialog id="cropper-dialog" close-on-overlay-click close-on-esc>
-            <div class="cropper-dialog-content">
-                <div class="cropper-header">
-                    <h3>Обрезать фото профиля</h3>
-                    <mdui-button-icon icon="close" id="cropper-close"></mdui-button-icon>
-                </div>
-                <div class="cropper-container">
-                    <div id="cropper-area"></div>
-                </div>
-                <div class="cropper-actions">
-                    <mdui-button id="crop-cancel" variant="outlined">Отмена</mdui-button>
-                    <mdui-button id="crop-save">Сохранить</mdui-button>
-                </div>
-            </div>
-        </mdui-dialog>
-
-        <mdui-dialog id="settings-dialog" close-on-overlay-click close-on-esc fullscreen>
-            <div class="fullscreen-wrapper">
-                <div id="settings-dialog-inner">
-                    <div class="header">
-                        <mdui-button-icon icon="close" id="settings-close"></mdui-button-icon>
-                        <mdui-top-app-bar-title>Настройки</mdui-top-app-bar-title>
-                    </div>
-                    <div id="settings-menu">
-                        <mdui-list>
-                            <mdui-list-item icon="notifications--filled" rounded active>Уведомления</mdui-list-item>
-                            <mdui-list-item icon="palette--filled" rounded>Внешний вид</mdui-list-item>
-                            <mdui-list-item icon="security--filled" rounded>Безопасность</mdui-list-item>
-                            <mdui-list-item icon="language--filled" rounded>Язык</mdui-list-item>
-                            <mdui-list-item icon="storage--filled" rounded>Хранилище</mdui-list-item>
-                            <mdui-list-item icon="help--filled" rounded>Помощь</mdui-list-item>
-                            <mdui-list-item icon="info--filled" rounded>О приложении</mdui-list-item>
-                        </mdui-list>
-                        <div class="screen">
-                            <div id="notifications-settings" class="settings-panel active">
-                                <h3>Уведомления</h3>
-                                <mdui-switch checked>Новые сообщения</mdui-switch>
-                                <mdui-switch checked>Звуковые уведомления</mdui-switch>
-                                <mdui-switch>Уведомления о статусе</mdui-switch>
-                                <mdui-switch checked>Email уведомления</mdui-switch>
-                            </div>
-                            
-                            <div id="appearance-settings" class="settings-panel">
-                                <h3>Внешний вид</h3>
-                                <mdui-select label="Тема" variant="outlined">
-                                    <mdui-menu-item value="dark">Тёмная</mdui-menu-item>
-                                    <mdui-menu-item value="light">Светлая</mdui-menu-item>
-                                    <mdui-menu-item value="auto">Авто</mdui-menu-item>
-                                </mdui-select>
-                                <mdui-select label="Размер шрифта" variant="outlined">
-                                    <mdui-menu-item value="small">Маленький</mdui-menu-item>
-                                    <mdui-menu-item value="medium">Средний</mdui-menu-item>
-                                    <mdui-menu-item value="large">Большой</mdui-menu-item>
-                                </mdui-select>
-                            </div>
-                            
-                            <div id="security-settings" class="settings-panel">
-                                <h3>Безопасность</h3>
-                                <mdui-button variant="outlined">Изменить пароль</mdui-button>
-                                <mdui-button variant="outlined">Двухфакторная аутентификация</mdui-button>
-                                <mdui-switch>Автоматический выход</mdui-switch>
-                            </div>
-                            
-                            <div id="language-settings" class="settings-panel">
-                                <h3>Язык</h3>
-                                <mdui-select label="Выберите язык" variant="outlined">
-                                    <mdui-menu-item value="ru">Русский</mdui-menu-item>
-                                    <mdui-menu-item value="en">English</mdui-menu-item>
-                                    <mdui-menu-item value="es">Español</mdui-menu-item>
-                                </mdui-select>
-                            </div>
-                            
-                            <div id="storage-settings" class="settings-panel">
-                                <h3>Хранилище</h3>
-                                <p>Использовано: 2.5 ГБ из 10 ГБ</p>
-                                <mdui-linear-progress value="25"></mdui-linear-progress>
-                                <mdui-button variant="outlined">Очистить кэш</mdui-button>
-                            </div>
-                            
-                            <div id="help-settings" class="settings-panel">
-                                <h3>Помощь</h3>
-                                <mdui-button variant="outlined">Руководство пользователя</mdui-button>
-                                <mdui-button variant="outlined">Связаться с поддержкой</mdui-button>
-                                <mdui-button variant="outlined">FAQ</mdui-button>
-                            </div>
-                            
-                            <div id="about-settings" class="settings-panel">
-                                <h3>О приложении</h3>
-                                <p>Версия: 1.0.0</p>
-                                <p>© 2024 From Chat. Все права защищены.</p>
-                                <mdui-button variant="outlined">Политика конфиденциальности</mdui-button>
-                                <mdui-button variant="outlined">Условия использования</mdui-button>
-                            </div>
-                        </div>
-                    </div>
-                </div>
-            </div>
-        </mdui-dialog>
-
-        <div id="message-context-menu" class="context-menu">
-            <div class="context-menu-item" data-action="reply">
-                <span class="material-symbols">reply</span>
-                Reply
-            </div>
-            <div class="context-menu-item" data-action="edit">
-                <span class="material-symbols">edit</span>
-                Edit
-            </div>
-            <div class="context-menu-item" data-action="delete">
-                <span class="material-symbols">delete</span>
-                Delete
-            </div>
-        </div>
-
-        <mdui-dialog id="edit-message-dialog" close-on-overlay-click close-on-esc>
-            <div class="dialog-content">
-                <h3>Edit Message</h3>
-                <mdui-text-field 
-                    id="edit-message-input"
-                    label="Edit Message" 
-                    variant="outlined" 
-                    multiline 
-                    rows="4" 
-                    placeholder="Edit your message..."
-                    maxlength="1000">
-                </mdui-text-field>
-                <div class="dialog-actions">
-                    <mdui-button id="edit-cancel" variant="outlined">Cancel</mdui-button>
-                    <mdui-button id="edit-save">Save</mdui-button>
-                </div>
-            </div>
-        </mdui-dialog>
-
-        <mdui-dialog id="reply-message-dialog" close-on-overlay-click close-on-esc>
-            <div class="dialog-content">
-                <h3>Reply to Message</h3>
-                <div class="reply-preview" id="reply-preview"></div>
-                <mdui-text-field 
-                    id="reply-message-input"
-                    label="Reply" 
-                    variant="outlined" 
-                    multiline 
-                    rows="4" 
-                    placeholder="Type your reply..."
-                    maxlength="1000">
-                </mdui-text-field>
-                <div class="dialog-actions">
-                    <mdui-button id="reply-cancel" variant="outlined">Cancel</mdui-button>
-                    <mdui-button id="reply-send">Send Reply</mdui-button>
-                </div>
-            </div>
-        </mdui-dialog>
-
-        <mdui-dialog id="user-profile-dialog" close-on-overlay-click close-on-esc>
-            <div class="content">
-                <div class="profile-picture-section">
-                    <img class="profile-picture" src="" alt="Profile Picture">
-                </div>
-                <div class="profile-info">
-                    <div class="username-section">
-                        <h4 class="username"></h4>
-                        <div class="online-status"></div>
-                    </div>
-                    <div class="bio-section">
-                        <label>Bio:</label>
-                        <div class="bio-display"></div>
-                    </div>
-                    <div class="profile-stats">
-                        <div class="stat">
-                            <span class="stat-label">Member since:</span>
-                            <span class="stat-value member-since"></span>
-                        </div>
-                        <div class="stat">
-                            <span class="stat-label">Last seen:</span>
-                            <span class="stat-value last-seen"></span>
-                        </div>
-                    </div>
-                </div>
-            </div>
-        </mdui-dialog>
-
-        <script src="src/main.ts" type="module"></script>
+        <div id="root"></div>
+        <script src="src/main.tsx" type="module"></script>
     </body>
 </html>