Set up basic project structure

frontend/src/auth/auth.ts

@@ -161,9 +161,6 @@ async function handleRegister(e: Event): Promise<void> {
 function init(): void {
     id('login-form-element').addEventListener('submit', handleLogin);
     id('register-form-element').addEventListener('submit', handleRegister);
-
-    id("login-link").addEventListener("click", showLogin);
-    id("register-link").addEventListener("click", showRegister);
 }
 
 init();

frontend/src/ui/App.tsx

@@ -1,3 +1,33 @@
+import ChatScreen from "./screen/ChatScreen";
+import LoginScreen from "./screen/LoginScreen";
+import RegisterScreen from "./screen/RegisterScreen";
+import { useAppState } from "./state"
+
 export default function App() {
-    return <></>
+    const { currentPage } = useAppState();
+
+    let page = <LoginScreen />;
+
+    switch (currentPage) {
+        case "login": {
+            page = <LoginScreen />
+            break;
+        }
+        case "register": {
+            page = <RegisterScreen />
+            break;
+        }
+        case "chat": {
+            page = <ChatScreen />
+            break;
+        }
+    }
+
+    return (
+        <>
+            <div id="main-wrapper">
+                {page}
+            </div>
+        </>
+    )
 }

frontend/src/ui/components/Auth.tsx

@@ -0,0 +1,11 @@
+import type React from "react";
+
+export function AuthContainer({ children }: { children?: React.ReactNode }) {
+    return (
+        <div className="auth-container">
+            <div className="auth-card fade-in">
+                {children}
+            </div>
+        </div>
+    )
+}

frontend/src/ui/screen/ChatScreen.tsx

@@ -0,0 +1,5 @@
+export default function ChatScreen() {
+    return (
+        <h1>test</h1>
+    )
+}

frontend/src/ui/screen/LoginScreen.tsx

@@ -0,0 +1,57 @@
+import { showLogin, showRegister } from "../../navigation";
+import { AuthContainer } from "../components/Auth";
+
+export default function LoginScreen() {
+    return (
+        <AuthContainer>
+            <div className="auth-header">
+                <h2>
+                    <span className="material-symbols filled large">login</span> 
+                    Добро пожаловать!
+                </h2>
+                <p>Войдите в свой аккаунт</p>
+            </div>
+            <div className="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 className="text-center">
+                    <p>
+                        Ещё нет аккаунта? 
+                        <a 
+                            href="#" 
+                            id="register-link" 
+                            className="link" 
+                            onClick={showRegister}>
+                            Зарегистрируйтесь
+                        </a>
+                    </p>
+                </div>
+            </div>
+        </AuthContainer>
+    )
+}

frontend/src/ui/screen/RegisterScreen.tsx

@@ -0,0 +1,70 @@
+import { showLogin } from "../../navigation";
+import { AuthContainer } from "../components/Auth";
+
+export default function RegisterScreen() {
+    return (
+        <AuthContainer>
+            <div className="auth-header">
+                <h2>
+                    <span className="material-symbols filled large">person_add</span> 
+                    Регистрация
+                </h2>
+                <p>Создайте новый аккаунт</p>
+            </div>
+            <div className="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 className="text-center">
+                    <p>
+                        Уже есть аккаунт? 
+                        <a 
+                            href="#" 
+                            id="login-link" 
+                            className="link" 
+                            onClick={showLogin}>
+                            Войдите
+                        </a>
+                    </p>
+                </div>
+            </div>
+        </AuthContainer>
+    )
+}

frontend/src/ui/state.ts

@@ -0,0 +1,13 @@
+import { create } from "zustand";
+
+type Page = "login" | "register" | "chat"
+
+interface AppState {
+    currentPage: Page;
+    setCurrentPage: (page: Page) => void;
+}
+
+export const useAppState = create<AppState>((set) => ({
+    currentPage: "login", // default page
+    setCurrentPage: (page: Page) => set({ currentPage: page })
+}));

frontend/src/vite-env.d.ts

@@ -1 +1,2 @@
 /// <reference types="vite/client" />
+/// <reference types="mdui/jsx.en.d.ts" />

package.json

@@ -29,6 +29,9 @@
         "prepare": "husky"
     },
     "devDependencies": {
+        "@types/react": "^19.1.12",
+        "@types/react-dom": "^19.1.9",
+        "@vitejs/plugin-react": "^5.0.2",
         "autoprefixer": "^10.4.21",
         "concurrently": "^9.2.0",
         "dotenv-cli": "^10.0.0",
@@ -41,15 +44,13 @@
         "vite": "^7.1.2",
         "vite-plugin-electron": "^0.29.0",
         "vite-plugin-electron-renderer": "^0.14.6",
-        "vite-plugin-html": "^3.2.2",
+        "vite-plugin-html": "^3.2.2"
-        "@vitejs/plugin-react": "^5.0.2",
-        "@types/react": "^19.1.12",
-        "@types/react-dom": "^19.1.9"
     },
     "dependencies": {
         "mdui": "^2.1.4",
-        "tweetnacl": "^1.0.3",
         "react": "^19.1.1",
-        "react-dom": "^19.1.1"
+        "react-dom": "^19.1.1",
+        "tweetnacl": "^1.0.3",
+        "zustand": "^5.0.8"
     }
 }