Implement desktop support

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

.idea/artifacts/shared_jvm.xml

@@ -0,0 +1,8 @@
+<component name="ArtifactManager">
+  <artifact type="jar" name="shared-jvm">
+    <output-path>$PROJECT_DIR$/utils/shared/build/libs</output-path>
+    <root id="archive" name="shared-jvm.jar">
+      <element id="module-output" name="FromChat.utils.shared.jvmMain" />
+    </root>
+  </artifact>
+</component>

.idea/compiler.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="21" />
+    <bytecodeTargetLevel target="17" />
   </component>
 </project>

.idea/gradle.xml

@@ -12,6 +12,7 @@
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
             <option value="$PROJECT_DIR$/app/android" />
+            <option value="$PROJECT_DIR$/app/desktop" />
             <option value="$PROJECT_DIR$/app/shared" />
             <option value="$PROJECT_DIR$/utils" />
             <option value="$PROJECT_DIR$/utils/android" />

.idea/kotlinc.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="KotlinJpsPluginSettings">
+    <option name="externalSystemId" value="Gradle" />
+    <option name="version" value="2.4.10" />
+  </component>
+</project>

.idea/misc.xml

@@ -1,6 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

README.en.md

@@ -2,14 +2,14 @@ Read in other languages: [Русский](./README.md)
 
 # FromChat
 
-FromChat is a 100% free and open-source messenger. This repository is the cross-platform client (Android + iOS; iOS is not ready yet).
+FromChat is a 100% free and open-source messenger. This repository is the cross-platform client (Android, Desktop via Compose Multiplatform, and iOS).
 
 [📥 Download](https://github.com/fromchat-messenger/android/releases/latest) • [💬 Telegram Channel](https://t.me/fromchat_ch) • [🖥️ Server](https://github.com/fromchat-messenger/backend)
 
 ## ✨ Features
 
 - **Voice and video calls** — LiveKit
-- **Screen sharing** during calls
+- **Screen sharing** during calls (Android)
 - **Public chat** — server-wide community
 - **Direct messages** — legal encryption scheme; server-side E2EE planned
 - **Device management** — active sessions
@@ -18,15 +18,16 @@ FromChat is a 100% free and open-source messenger. This repository is the cross-
 
 ## 📊 Client Comparison
 
-⚠️ **iOS is temporarily not supported** (Apple constraints and development cost). It will ship later.
+| Feature | Android | Desktop | Web | iOS |
+| --- | --- | --- | --- | --- |
+| **Messaging and profiles** | ✅ | ✅ | ✅ | ✅ |
+| **Voice/video calls** | ✅ | ✅ | ✅ | ✅ |
+| **Screen sharing** | ✅ | ❌ | ✅ | ❌ |
+| **Push when backgrounded** | ✅ (FCM) | ✅ (persistent WS + tray) | ✅ | ❌ (WS while open) |
+| **Message reactions** | ❌ | ❌ | ✅ | ❌ |
+| **Rich attachment support** | ✅ | ✅ | ❌ | ✅ |
 
-| Feature | Android | Web | iOS |
-| --- | --- | --- | --- |
-| **Messaging and profiles** | ✅ | ✅ | ❌ |
-| **Voice/video calls** | ✅ | ✅ | ❌ |
-| **Screen sharing** | ✅ | ✅ | ❌ |
-| **Message reactions** | ❌ | ✅ | ❌ |
-| **Rich attachment support** | ✅ | ❌ | ❌ |
+Desktop replaces the former Electron client in the Web repo. Run with `./gradlew :app:desktop:run`.
 
 ---
 

README.md

@@ -2,14 +2,14 @@
 
 # FromChat
 
-FromChat — 100% бесплатный и открытый мессенджер. В этом репозитории — кроссплатформенный клиент (Android + iOS; iOS пока не готов).
+FromChat — 100% бесплатный и открытый мессенджер. В этом репозитории — кроссплатформенный клиент (Android, Desktop на Compose Multiplatform и iOS).
 
 [📥 Скачать](https://github.com/fromchat-messenger/android/releases/latest) • [💬 Telegram-канал](https://t.me/fromchat_ch) • [🖥️ Сервер](https://github.com/fromchat-messenger/backend)
 
 ## ✨ Возможности
 
 - **Голосовые и видеозвонки** — LiveKit
-- **Демонстрация экрана** во время звонков
+- **Демонстрация экрана** во время звонков (Android)
 - **Общий чат** — сообщество пользователей сервера
 - **Личные сообщения** — легальная схема шифрования; E2EE на сервере планируется
 - **Управление устройствами** — активные сеансы
@@ -18,15 +18,16 @@ FromChat — 100% бесплатный и открытый мессенджер.
 
 ## 📊 Сравнение клиентов
 
-⚠️ **iOS временно не поддерживается** (ограничения Apple и объём работы). Клиент выйдет позже.
+| Возможность | Android | Desktop | Web | iOS |
+| --- | --- | --- | --- | --- |
+| **Обмен сообщениями и профили** | ✅ | ✅ | ✅ | ✅ |
+| **Голосовые/видеозвонки** | ✅ | ✅ | ✅ | ✅ |
+| **Демонстрация экрана** | ✅ | ❌ | ✅ | ❌ |
+| **Push в фоне** | ✅ (FCM) | ✅ (постоянный WS + tray) | ✅ | ❌ (WS пока открыто) |
+| **Реакции на сообщения** | ❌ | ❌ | ✅ | ❌ |
+| **Расширенная поддержка вложений** | ✅ | ✅ | ❌ | ✅ |
 
-| Возможность | Android | Web | iOS |
-| --- | --- | --- | --- |
-| **Обмен сообщениями и профили** | ✅ | ✅ | ❌ |
-| **Голосовые/видеозвонки** | ✅ | ✅ | ❌ |
-| **Демонстрация экрана** | ✅ | ✅ | ❌ |
-| **Реакции на сообщения** | ❌ | ✅ | ❌ |
-| **Расширенная поддержка вложений** | ✅ | ❌ | ❌ |
+Desktop заменяет бывший Electron-клиент в репозитории Web. Запуск: `./gradlew :app:desktop:run`.
 
 ---
 

app/desktop/build.gradle.kts

@@ -0,0 +1,106 @@
+plugins {
+    kotlin("jvm")
+    alias(libs.plugins.compose.multiplatform)
+    alias(libs.plugins.compose.compiler)
+}
+
+val javafxVersion = libs.versions.openjfx.get()
+val javafxClassifier = openjfxClassifier()
+val javafxModules = listOf("base", "graphics", "controls", "media", "web", "swing")
+
+dependencies {
+    implementation(compose.desktop.currentOs)
+    implementation(project(":app:shared"))
+    implementation(project(":utils:shared"))
+    implementation(libs.kotlinx.coroutines.swing)
+    // OpenJFX publishes empty jars without a classifier; declare every module
+    // with the host classifier and exclude transitive stubs.
+    javafxModules.forEach { module ->
+        implementation("org.openjfx:javafx-$module:$javafxVersion:$javafxClassifier") {
+            exclude(group = "org.openjfx")
+        }
+    }
+}
+
+compose.desktop {
+    application {
+        mainClass = "ru.fromchat.desktop.MainKt"
+
+        nativeDistributions {
+            packageName = "FromChat"
+            packageVersion = "1.0.0"
+            description = "FromChat desktop"
+            copyright = "© FromChat"
+
+            modules(
+                "javafx.base",
+                "javafx.graphics",
+                "javafx.controls",
+                "javafx.media",
+                "javafx.web",
+                "javafx.swing",
+            )
+
+            macOS {
+                bundleID = "ru.fromchat.desktop"
+                infoPlist {
+                    extraKeysRawXml = """
+                        <key>CFBundleURLTypes</key>
+                        <array>
+                          <dict>
+                            <key>CFBundleURLName</key>
+                            <string>FromChat</string>
+                            <key>CFBundleURLSchemes</key>
+                            <array>
+                              <string>fromchat</string>
+                            </array>
+                          </dict>
+                        </array>
+                    """.trimIndent()
+                }
+            }
+        }
+    }
+}
+
+kotlin {
+    jvmToolchain(17)
+}
+
+/**
+ * Compose Desktop puts the whole runtime classpath on the unnamed module path.
+ * JavaFX 11+ must be loaded as named modules via --module-path / --add-modules,
+ * and those jars must not also sit on the regular classpath.
+ */
+tasks.matching { it.name == "run" }.configureEach {
+    if (this !is JavaExec) return@configureEach
+    doFirst {
+        val javafxJars = classpath.files.filter { file ->
+            javafxModules.any { module -> file.name.startsWith("javafx-$module-") }
+        }
+        classpath = files(classpath.files.filterNot { it in javafxJars.toSet() })
+        jvmArgs(
+            listOf(
+                "--module-path",
+                javafxJars.joinToString(File.pathSeparator) { it.absolutePath },
+                "--add-modules",
+                "javafx.controls,javafx.web,javafx.swing,javafx.media,javafx.graphics,javafx.base",
+                "--add-opens",
+                "javafx.graphics/com.sun.javafx.application=ALL-UNNAMED",
+            ),
+        )
+    }
+}
+
+private fun openjfxClassifier(): String {
+    val os = System.getProperty("os.name").lowercase()
+    val arch = System.getProperty("os.arch").lowercase()
+    val isArm = arch == "aarch64" || arch == "arm64"
+    return when {
+        os.contains("mac") && isArm -> "mac-aarch64"
+        os.contains("mac") -> "mac"
+        os.contains("win") -> "win"
+        isArm -> "linux-aarch64"
+        else -> "linux"
+    }
+}

app/desktop/src/main/kotlin/ru/fromchat/desktop/Main.kt

@@ -0,0 +1,249 @@
+package ru.fromchat.desktop
+
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.window.Notification
+import androidx.compose.ui.window.Tray
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import androidx.compose.ui.window.rememberTrayState
+import androidx.compose.ui.window.rememberWindowState
+import com.pr0gramm3r101.utils.UtilsLibrary
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.launch
+import ru.fromchat.AppForeground
+import ru.fromchat.api.ApiClient
+import ru.fromchat.api.local.workers.AttachmentTransferBootstrap
+import ru.fromchat.ui.App
+import java.io.BufferedReader
+import java.io.InputStreamReader
+import java.io.OutputStreamWriter
+import java.net.InetAddress
+import java.net.ServerSocket
+import java.net.Socket
+import java.nio.charset.StandardCharsets
+import java.util.concurrent.atomic.AtomicBoolean
+import kotlin.concurrent.thread
+
+private object DesktopApplicationBootstrap {
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+    private var started = false
+
+    fun launchOnApplicationStart() {
+        if (started) return
+        started = true
+        AppForeground.setForeground(true)
+        scope.launch {
+            runCatching { ApiClient.loadPersistedData() }
+            runCatching { AttachmentTransferBootstrap.runColdStart() }
+        }
+    }
+}
+
+private object DesktopSingleInstance {
+    private const val PORT = 38_741
+    private val running = AtomicBoolean(false)
+
+    /**
+     * @return true if this process owns the instance and should show UI;
+     * false if another instance is already running (deep link forwarded).
+     */
+    fun acquireOrForward(args: Array<String>): Boolean {
+        val deepLink = args.firstOrNull { DesktopDeepLinkBus.isFromChatUri(it) }
+        return try {
+            val server = ServerSocket(PORT, 8, InetAddress.getByName("127.0.0.1"))
+            running.set(true)
+            thread(name = "fromchat-deeplink-ipc", isDaemon = true) {
+                while (running.get()) {
+                    runCatching {
+                        server.accept().use { socket ->
+                            val line = BufferedReader(
+                                InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8),
+                            ).readLine()?.trim().orEmpty()
+                            if (DesktopDeepLinkBus.isFromChatUri(line)) {
+                                DesktopDeepLinkBus.handleUri(line)
+                            }
+                        }
+                    }
+                }
+            }
+            if (deepLink != null) {
+                DesktopDeepLinkBus.handleUri(deepLink)
+            }
+            true
+        } catch (_: Exception) {
+            if (deepLink != null) {
+                runCatching {
+                    Socket("127.0.0.1", PORT).use { socket ->
+                        OutputStreamWriter(socket.getOutputStream(), StandardCharsets.UTF_8).use { out ->
+                            out.write(deepLink)
+                            out.write("\n")
+                            out.flush()
+                        }
+                    }
+                }
+            }
+            false
+        }
+    }
+
+    fun release() {
+        running.set(false)
+    }
+}
+
+private object DesktopProtocolRegistration {
+    private const val SCHEME = "fromchat"
+
+    fun registerBestEffort() {
+        runCatching {
+            when {
+                isMac() -> Unit // Packaged macOS builds declare CFBundleURLTypes in Info.plist.
+                isWindows() -> registerWindows()
+                isLinux() -> registerLinux()
+            }
+        }
+    }
+
+    private fun isMac(): Boolean =
+        System.getProperty("os.name").orEmpty().lowercase().contains("mac")
+
+    private fun isWindows(): Boolean =
+        System.getProperty("os.name").orEmpty().lowercase().contains("win")
+
+    private fun isLinux(): Boolean =
+        System.getProperty("os.name").orEmpty().lowercase().contains("linux")
+
+    private fun javaLauncherCommand(): String {
+        val javaHome = System.getProperty("java.home")
+        val javaBin = if (isWindows()) "$javaHome\\bin\\javaw.exe" else "$javaHome/bin/java"
+        val classPath = System.getProperty("java.class.path")
+        val main = "ru.fromchat.desktop.MainKt"
+        return if (isWindows()) {
+            "\"$javaBin\" -cp \"$classPath\" $main"
+        } else {
+            "$javaBin -cp ${shellQuote(classPath)} $main"
+        }
+    }
+
+    private fun shellQuote(value: String): String =
+        "'" + value.replace("'", "'\\''") + "'"
+
+    private fun registerWindows() {
+        val command = javaLauncherCommand() + " \"%1\""
+        val base = "HKCU\\Software\\Classes\\$SCHEME"
+        listOf(
+            listOf("reg", "add", base, "/ve", "/d", "URL:FromChat Protocol", "/f"),
+            listOf("reg", "add", base, "/v", "URL Protocol", "/d", "", "/f"),
+            listOf("reg", "add", "$base\\shell\\open\\command", "/ve", "/d", command, "/f"),
+        ).forEach { args ->
+            ProcessBuilder(args).redirectErrorStream(true).start().waitFor()
+        }
+    }
+
+    private fun registerLinux() {
+        val appsDir = java.io.File(System.getProperty("user.home"), ".local/share/applications")
+        appsDir.mkdirs()
+        val desktop = java.io.File(appsDir, "fromchat-url-handler.desktop")
+        desktop.writeText(
+            """
+            |[Desktop Entry]
+            |Type=Application
+            |Name=FromChat URL Handler
+            |Exec=${javaLauncherCommand()} %u
+            |StartupNotify=false
+            |MimeType=x-scheme-handler/$SCHEME;
+            |NoDisplay=true
+            """.trimMargin(),
+        )
+        ProcessBuilder("xdg-mime", "default", desktop.name, "x-scheme-handler/$SCHEME")
+            .redirectErrorStream(true)
+            .start()
+            .waitFor()
+        ProcessBuilder("update-desktop-database", appsDir.absolutePath)
+            .redirectErrorStream(true)
+            .start()
+            .waitFor()
+    }
+}
+
+fun main(args: Array<String>) {
+    if (!DesktopSingleInstance.acquireOrForward(args)) return
+    DesktopProtocolRegistration.registerBestEffort()
+    args.filter { DesktopDeepLinkBus.isFromChatUri(it) }
+        .forEach { DesktopDeepLinkBus.handleUri(it) }
+
+    application {
+        UtilsLibrary.init()
+        DesktopApplicationBootstrap.launchOnApplicationStart()
+
+        val windowState = rememberWindowState()
+        var windowVisible by remember { mutableStateOf(true) }
+        val trayState = rememberTrayState()
+        val trayIcon = remember { createTrayIconPainter() }
+        val traySupported = remember { java.awt.SystemTray.isSupported() }
+
+        DisposableEffect(trayState) {
+            DesktopNotifier.sink = { title, body ->
+                trayState.sendNotification(
+                    Notification(title = title, message = body),
+                )
+            }
+            onDispose {
+                DesktopNotifier.sink = null
+                DesktopSingleInstance.release()
+            }
+        }
+
+        if (traySupported) {
+            Tray(
+                icon = trayIcon,
+                state = trayState,
+                tooltip = "FromChat",
+                onAction = { windowVisible = true },
+                menu = {
+                    Item("Show") { windowVisible = true }
+                    Item("Quit") { exitApplication() }
+                },
+            )
+        }
+
+        Window(
+            onCloseRequest = {
+                if (traySupported) {
+                    windowVisible = false
+                    AppForeground.setForeground(true)
+                } else {
+                    exitApplication()
+                }
+            },
+            title = "FromChat",
+            state = windowState,
+            visible = windowVisible || !traySupported,
+            icon = trayIcon,
+        ) {
+            DisposableEffect(Unit) {
+                AppForeground.setForeground(true)
+                onDispose { }
+            }
+            App()
+        }
+    }
+}
+
+private fun createTrayIconPainter(): Painter = object : Painter() {
+    override val intrinsicSize: Size = Size(32f, 32f)
+
+    override fun DrawScope.onDraw() {
+        drawRect(Color(0xFF4484F4))
+    }
+}

app/ios/iosApp.xcodeproj/xcshareddata/xcschemes/iosApp.xcscheme

@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1500"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "7555FF7A242A565900829871"
+               BuildableName = "FromChat.app"
+               BlueprintName = "iosApp"
+               ReferencedContainer = "container:iosApp.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldAutocreateTestPlan = "YES">
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "7555FF7A242A565900829871"
+            BuildableName = "FromChat.app"
+            BlueprintName = "iosApp"
+            ReferencedContainer = "container:iosApp.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "7555FF7A242A565900829871"
+            BuildableName = "FromChat.app"
+            BlueprintName = "iosApp"
+            ReferencedContainer = "container:iosApp.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

app/ios/iosApp/Info.plist

@@ -27,6 +27,14 @@
 		<key>NSAllowsArbitraryLoads</key>
 		<true/>
 	</dict>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>FromChat needs microphone access for voice and video calls.</string>
+	<key>NSCameraUsageDescription</key>
+	<string>FromChat needs camera access for video calls.</string>
+	<key>NSPhotoLibraryUsageDescription</key>
+	<string>FromChat needs photo library access so you can attach images to messages.</string>
+	<key>NSPhotoLibraryAddUsageDescription</key>
+	<string>FromChat needs permission to save images you export from chats.</string>
 	<key>UIApplicationSceneManifest</key>
 	<dict>
 		<key>UIApplicationSupportsMultipleScenes</key>

app/shared/build.gradle.kts

@@ -75,6 +75,8 @@ kotlin {
         freeCompilerArgs.addAll("-Xexpect-actual-classes")
     }
 
+    jvm()
+
     listOf(
         iosArm64(),
         iosSimulatorArm64(),
@@ -107,8 +109,8 @@ kotlin {
             implementation(libs.navigation.compose)
             implementation(libs.compose.materialIconsExtended)
             implementation(libs.haze)
-            implementation(libs.haze.materials)
-            implementation(libs.androidx.core.ktx)
+            implementation(libs.haze.blur)
+            implementation(libs.haze.blur.materials)
             implementation(libs.androidx.lifecycle.runtime.compose)
 
             // Serialization
@@ -142,6 +144,7 @@ kotlin {
         }
 
         androidMain.dependencies {
+            implementation(libs.androidx.core.ktx)
             implementation(libs.markdown.renderer.m3)
             implementation(libs.bouncycastle.bcprov)
             implementation(libs.androidx.exifinterface)
@@ -164,6 +167,37 @@ kotlin {
             implementation(libs.multiplatform.crypto.libsodium.bindings)
             implementation(libs.sqldelight.driver.native)
         }
+
+        jvmMain.dependencies {
+            implementation(libs.jetbrains.kotlinx.io.bytestring)
+            implementation(libs.jetbrains.kotlinx.coroutines.core)
+            implementation(libs.ktor.client.cio)
+            implementation(libs.multiplatform.crypto.libsodium.bindings)
+            implementation(libs.sqldelight.driver.sqlite)
+            implementation(libs.bouncycastle.bcprov)
+            // OpenJFX publishes empty jars without a classifier; declare every module
+            // with the host classifier and exclude transitive stubs.
+            val javafxVersion = libs.versions.openjfx.get()
+            val javafxClassifier = openjfxClassifier()
+            listOf("base", "graphics", "controls", "media", "web", "swing").forEach { module ->
+                implementation("org.openjfx:javafx-$module:$javafxVersion:$javafxClassifier") {
+                    exclude(group = "org.openjfx")
+                }
+            }
+        }
+    }
+}
+
+private fun openjfxClassifier(): String {
+    val os = System.getProperty("os.name").lowercase()
+    val arch = System.getProperty("os.arch").lowercase()
+    val isArm = arch == "aarch64" || arch == "arm64"
+    return when {
+        os.contains("mac") && isArm -> "mac-aarch64"
+        os.contains("mac") -> "mac"
+        os.contains("win") -> "win"
+        isArm -> "linux-aarch64"
+        else -> "linux"
     }
 }
 

app/shared/src/androidMain/kotlin/ru/fromchat/KeepWebSocketAlive.android.kt

@@ -0,0 +1,3 @@
+package ru.fromchat
+
+actual fun keepWebSocketAliveInBackground(): Boolean = false

app/shared/src/androidMain/kotlin/ru/fromchat/ui/calls/CallMediaLayer.android.kt

@@ -93,10 +93,10 @@ import androidx.compose.ui.zIndex
 import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
 import dev.chrisbanes.haze.HazeState
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import io.livekit.android.RoomOptions
 import io.livekit.android.compose.local.RoomScope
@@ -275,7 +275,6 @@ private fun CallSlotSharedVideo(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 actual fun CallMediaLayer(
     connect: LiveKitConnectSession?,
@@ -551,7 +550,6 @@ actual fun CallMediaLayer(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun CallRoomContent(
     room: Room,
@@ -651,7 +649,7 @@ private fun CallRoomContent(
     val participants = rememberParticipants(room).value
     val local = room.localParticipant
     val remote: Participant? = participants.firstOrNull { it != local }
-    val hazeState = rememberHazeState(blurEnabled = showInCallControls)
+    val hazeState = rememberHazeState()
     Box(
         modifier = modifier
             .fillMaxSize()
@@ -1179,7 +1177,7 @@ private fun CallPreviewCluster(
     }
 }
 
-@OptIn(ExperimentalSharedTransitionApi::class, ExperimentalHazeMaterialsApi::class)
+@OptIn(ExperimentalSharedTransitionApi::class)
 @Composable
 private fun PreviewTile(
     room: Room,
@@ -1198,7 +1196,7 @@ private fun PreviewTile(
     val tileShape = RoundedCornerShape(16.dp)
     // Only blur the *tile content* when the track isn't available yet.
     // Do not blur the whole call scene; otherwise the opponent video stays blurred.
-    val hazeState = rememberHazeState(blurEnabled = ref == null || !showVideo)
+    val hazeState = rememberHazeState()
     Box(
         modifier = Modifier
             .size(104.dp, 138.dp)
@@ -1223,11 +1221,16 @@ private fun PreviewTile(
                 innerClipShape = tileShape,
             )
         } else {
+            val placeholderHazeStyle = HazeMaterials.thick()
             Box(
                 Modifier
                     .fillMaxSize()
                     // Placeholder blur only for missing/disabled track.
-                    .hazeEffect(state = hazeState, style = HazeMaterials.thick())
+                    .hazeEffect(state = hazeState) {
+                        blurEffect {
+                            style = placeholderHazeStyle
+                        }
+                    }
                     .background(MaterialTheme.colorScheme.surfaceContainerLow.copy(alpha = 0.55f)),
             )
         }
@@ -1246,7 +1249,6 @@ private fun PreviewTile(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun CallInlineControlBar(
     room: Room,
@@ -1327,11 +1329,16 @@ private fun CallInlineControlBar(
         modifier = modifier.fillMaxWidth(),
         contentAlignment = Alignment.Center,
     ) {
+        val controlsHazeStyle = HazeMaterials.thick()
         Box(
             modifier = Modifier
                 .fillMaxWidth(0.86f)
                 .clip(RoundedCornerShape(28.dp))
-                .hazeEffect(state = hazeState, style = HazeMaterials.thick())
+                .hazeEffect(state = hazeState) {
+                    blurEffect {
+                        style = controlsHazeStyle
+                    }
+                }
                 .background(MaterialTheme.colorScheme.surfaceContainerHigh.copy(alpha = 0.48f)),
         ) {
         Row(

app/shared/src/androidMain/kotlin/ru/fromchat/ui/calls/NotifyIncomingCall.android.kt

@@ -0,0 +1,3 @@
+package ru.fromchat.ui.calls
+
+internal actual fun notifyIncomingCall(title: String, body: String) = Unit

app/shared/src/androidMain/kotlin/ru/fromchat/ui/main/settings/NotificationsScreen.android.kt

@@ -40,4 +40,6 @@ actual fun areAppNotificationsEnabled(): Boolean {
     } else {
         true
     }
-}
+}
+
+actual fun arePushNotificationsSupported(): Boolean = true

app/shared/src/commonMain/composeResources/values-ru/strings.xml

@@ -59,6 +59,7 @@
     <string name="auth_captcha_body">Подтвердите, что вы человек, чтобы продолжить создание аккаунта.</string>
     <string name="auth_captcha_failed">Не удалось пройти проверку. Попробуйте ещё раз.</string>
     <string name="auth_yandex_webview_title">Яндекс ID</string>
+    <string name="auth_yandex_browser_body">Завершите вход в браузере</string>
     <string name="auth_yandex_client_mismatch">Сервер вернул неожиданный идентификатор приложения Яндекса. Обновите приложение или обратитесь в поддержку.</string>
     <string name="auth_yandex_failed">Вход через Яндекс ID отменён или не удался.</string>
     <string name="chats">Чаты</string>
@@ -324,6 +325,7 @@
     <string name="settings_notifications_permission_required">Откройте системные настройки и разрешите уведомления.</string>
     <string name="settings_push_notifications">Push-уведомления</string>
     <string name="settings_push_notifications_d">Они помогут вам узнать, если появилось новое сообщение пока приложение закрыто.</string>
+    <string name="settings_push_notifications_unavailable">Недоступны на этой платформе. Новые сообщения видны только пока приложение открыто.</string>
 
     <string name="settings_devices_title">Устройства</string>
     <string name="settings_devices_empty">Нет активных сессий</string>

app/shared/src/commonMain/composeResources/values/strings.xml

@@ -66,6 +66,7 @@
     <string name="auth_captcha_body">Confirm you’re human to continue creating your account.</string>
     <string name="auth_captcha_failed">Captcha verification failed. Please try again.</string>
     <string name="auth_yandex_webview_title">Yandex ID</string>
+    <string name="auth_yandex_browser_body">Complete sign-in in your browser</string>
     <string name="auth_yandex_client_mismatch">This server returned an unexpected Yandex app id. Update the app or contact support.</string>
     <string name="auth_yandex_failed">Yandex sign-in was cancelled or failed.</string>
     <!-- Main Screen -->
@@ -353,6 +354,7 @@
     <string name="settings_notifications_permission_required">Open system notification settings to allow alerts.</string>
     <string name="settings_push_notifications">Push notifications</string>
     <string name="settings_push_notifications_d">These will let you know if you got a new message when the app is closed.</string>
+    <string name="settings_push_notifications_unavailable">Not available on this platform. New messages are only visible while the app is open.</string>
 
     <string name="settings_devices_title">Devices</string>
     <string name="settings_devices_empty">No active sessions</string>

app/shared/src/commonMain/kotlin/ru/fromchat/KeepWebSocketAlive.kt

@@ -0,0 +1,8 @@
+package ru.fromchat
+
+/**
+ * When true, the WebSocket reconnect loop does not pause while the UI is not
+ * "started" (e.g. desktop window hidden to tray). Mobile keeps the existing
+ * foreground-gated behavior.
+ */
+expect fun keepWebSocketAliveInBackground(): Boolean

app/shared/src/commonMain/kotlin/ru/fromchat/api/local/WebSocketManager.kt

@@ -29,6 +29,7 @@ import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.jsonObject
 import kotlinx.serialization.json.jsonPrimitive
 import ru.fromchat.AppForeground
+import ru.fromchat.keepWebSocketAliveInBackground
 import ru.fromchat.Logger
 import ru.fromchat.api.ApiClient
 import ru.fromchat.api.UpdateSyncManager
@@ -117,6 +118,7 @@ object WebSocketManager {
     }
 
     private suspend fun awaitForeground() {
+        if (keepWebSocketAliveInBackground()) return
         if (AppForeground.isInForeground.value) return
         AppForeground.isInForeground.first { it }
     }
@@ -369,7 +371,7 @@ object WebSocketManager {
     }
 
     fun onNetworkAvailable() {
-        if (!AppForeground.isInForeground.value) return
+        if (!keepWebSocketAliveInBackground() && !AppForeground.isInForeground.value) return
 
         val now = Clock.System.now().toEpochMilliseconds()
         val prev = lastOnNetworkAvailableWallMs
@@ -393,7 +395,7 @@ object WebSocketManager {
      * Restarts the reconnect loop immediately instead of waiting out exponential backoff.
      */
     fun onServerLikelyReachable() {
-        if (!AppForeground.isInForeground.value) return
+        if (!keepWebSocketAliveInBackground() && !AppForeground.isInForeground.value) return
         if (session != null) return
         if (ApiClient.token.isNullOrEmpty()) return
 

app/shared/src/commonMain/kotlin/ru/fromchat/api/local/db/store/PublicChatProfileCache.kt

@@ -30,36 +30,25 @@ object PublicChatProfileCache {
      */
     fun hydrateFromDiskImmediate(instanceId: String): PublicChatProfile? {
         val id = instanceId.trim()
-        synchronized(this) {
-            if (id.isEmpty()) {
-                return _profile.value
-            }
-            if (loadedInstanceId == id && isCompleteProfile(_profile.value)) {
-                return _profile.value
-            }
-            val previousInstanceId = loadedInstanceId
-            loadedInstanceId = id
-            val disk = PublicChatProfileCacheStore.getImmediate(id)
-            _profile.value = when {
-                disk != null -> disk
-                previousInstanceId.isEmpty() -> _profile.value
-                previousInstanceId != id -> null
-                else -> _profile.value
-            }
-            return _profile.value
+        if (id.isEmpty()) return _profile.value
+        if (loadedInstanceId == id && isCompleteProfile(_profile.value)) return _profile.value
+        val previousInstanceId = loadedInstanceId
+        loadedInstanceId = id
+        val disk = PublicChatProfileCacheStore.getImmediate(id)
+        _profile.value = when {
+            disk != null -> disk
+            previousInstanceId.isEmpty() -> _profile.value
+            previousInstanceId != id -> null
+            else -> _profile.value
         }
+        return _profile.value
     }
 
     fun put(profile: PublicChatProfile) {
-        val instanceId: String
-        synchronized(this) {
-            _profile.value = profile
-            instanceId = resolvedInstanceId()
-            if (instanceId.isNotEmpty()) {
-                loadedInstanceId = instanceId
-            }
-        }
+        _profile.value = profile
+        val instanceId = resolvedInstanceId()
         if (instanceId.isNotEmpty()) {
+            loadedInstanceId = instanceId
             runCatching { PublicChatProfileCacheStore.putImmediate(instanceId, profile) }
         }
     }
@@ -73,10 +62,8 @@ object PublicChatProfileCache {
     }
 
     suspend fun clear() {
-        synchronized(this) {
-            _profile.value = null
-            loadedInstanceId = ""
-        }
+        _profile.value = null
+        loadedInstanceId = ""
     }
 
     private fun resolvedInstanceId(): String =

app/shared/src/commonMain/kotlin/ru/fromchat/legal/DocumentScreen.kt

@@ -54,6 +54,7 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import com.pr0gramm3r101.utils.ToggleNavScrimEffect
+import dev.chrisbanes.haze.blur.blurEffect
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
 import dev.chrisbanes.haze.rememberHazeState
@@ -101,7 +102,7 @@ fun DocumentScreen(
 ) {
     val scrollBehavior = TopAppBarDefaults.exitUntilCollapsedScrollBehavior(rememberTopAppBarState())
     val listState = rememberLazyListState()
-    val hazeState = rememberHazeState(blurEnabled = true)
+    val hazeState = rememberHazeState()
 
     LaunchedEffect(type) {
         listState.scrollToItem(0)
@@ -116,6 +117,7 @@ fun DocumentScreen(
         contentColor = MaterialTheme.colorScheme.onSurface,
         contentWindowInsets = WindowInsets.navigationBars,
         topBar = {
+            val topBarHazeStyle = rememberChatSurfaceContainerHazeStyle()
             MediumTopAppBar(
                 title = {
                     Text(
@@ -141,10 +143,11 @@ fun DocumentScreen(
                 ),
                 modifier = Modifier
                     .background(MaterialTheme.colorScheme.surfaceContainer.copy(alpha = 0.91f))
-                    .hazeEffect(
-                        state = hazeState,
-                        style = rememberChatSurfaceContainerHazeStyle(),
-                    ),
+                    .hazeEffect(state = hazeState) {
+                        blurEffect {
+                            style = topBarHazeStyle
+                        }
+                    },
             )
         },
     ) { innerPadding ->

app/shared/src/commonMain/kotlin/ru/fromchat/logging/AppLogStore.kt

@@ -12,6 +12,7 @@ import kotlinx.coroutines.withContext
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.TimeZone
 import kotlinx.datetime.atStartOfDayIn
+import kotlinx.coroutines.runBlocking
 import kotlin.time.Clock
 import kotlin.time.Instant
 
@@ -52,8 +53,6 @@ object AppLogStore {
     private var loadedFromDisk = false
     private var nextEntryId = 0L
 
-    private val writeLock = Any()
-
     fun record(
         level: AppLogLevel,
         tag: String,
@@ -68,8 +67,14 @@ object AppLogStore {
             message = message,
             stackTrace = throwable?.stackTraceToString(),
         )
-        synchronized(writeLock) {
-            appendEntry(entry)
+        if (mutex.tryLock()) {
+            try {
+                appendEntry(entry)
+            } finally {
+                mutex.unlock()
+            }
+        } else {
+            runBlocking { mutex.withLock { appendEntry(entry) } }
         }
     }
 

app/shared/src/commonMain/kotlin/ru/fromchat/ui/App.kt

@@ -11,9 +11,13 @@ import androidx.compose.animation.fadeOut
 import androidx.compose.animation.scaleIn
 import androidx.compose.animation.scaleOut
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.width
 import androidx.compose.material3.SnackbarDuration
 import androidx.compose.material3.SnackbarHostState
+import androidx.compose.material3.VerticalDivider
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.DisposableEffect
@@ -24,6 +28,7 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
 import androidx.navigation.NamedNavArgument
@@ -33,6 +38,7 @@ import androidx.navigation.NavGraphBuilder
 import androidx.navigation.NavType
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
+import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
 import androidx.navigation.navArgument
 import coil3.ImageLoader
@@ -41,8 +47,11 @@ import coil3.network.ktor3.KtorNetworkFetcherFactory
 import coil3.svg.SvgDecoder
 import ru.fromchat.api.ApiClient
 import com.pr0gramm3r101.utils.LocalSystemBarsVisibility
+import com.pr0gramm3r101.utils.WindowWidthSizeClass
+import com.pr0gramm3r101.utils.currentWindowAdaptiveInfo
 import com.pr0gramm3r101.utils.navigateAndWipeBackStack
 import com.pr0gramm3r101.utils.rememberSystemBarsController
+import com.pr0gramm3r101.utils.widthSizeClass
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.launch
@@ -55,6 +64,7 @@ import kotlinx.serialization.json.jsonObject
 import kotlinx.serialization.json.jsonPrimitive
 import ru.fromchat.AppForeground
 import ru.fromchat.Logger
+import ru.fromchat.keepWebSocketAliveInBackground
 import ru.fromchat.api.DeferredStartupNetwork
 import ru.fromchat.api.ProfileUpdateSync
 import ru.fromchat.api.PublicChatProfileSync
@@ -116,6 +126,10 @@ import ru.fromchat.utils.NetworkConnectivity
 
 val LocalNavController = compositionLocalOf<NavController> { error("NavController not provided") }
 
+private fun isConversationChatRoute(route: String?): Boolean =
+    route == PublicChatNav.CHAT_ROUTE ||
+        (route != null && route.startsWith("dm/") && "/chat" in route)
+
 private val rootNavTween = tween<Float>(durationMillis = 250, easing = FastOutSlowInEasing)
 
 private fun rootNavEnterTransition(): EnterTransition =
@@ -281,9 +295,14 @@ fun App(
     }
 
     // Foreground → WebSocket reconnect; background → pause reconnect attempts (see [WebSocketManager]).
+    // Desktop keeps the socket alive while the process runs (tray / hidden window).
     val lifecycleOwner = androidx.lifecycle.compose.LocalLifecycleOwner.current
     DisposableEffect(lifecycleOwner) {
         fun syncForeground() {
+            if (keepWebSocketAliveInBackground()) {
+                AppForeground.setForeground(true)
+                return
+            }
             AppForeground.setForeground(
                 lifecycleOwner.lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED)
             )
@@ -301,7 +320,11 @@ fun App(
                         }
                     }
                 }
-                Lifecycle.Event.ON_STOP -> AppForeground.setForeground(false)
+                Lifecycle.Event.ON_STOP -> {
+                    if (!keepWebSocketAliveInBackground()) {
+                        AppForeground.setForeground(false)
+                    }
+                }
                 else -> {}
             }
         }
@@ -413,16 +436,37 @@ fun App(
                 LocalSystemBarsVisibility provides rememberSystemBarsController()
             ) {
                 if (startDestination != null) {
+                    val currentEntry by navController.currentBackStackEntryAsState()
+                    val showConversationListDetail =
+                        currentWindowAdaptiveInfo().widthSizeClass == WindowWidthSizeClass.EXPANDED &&
+                            isConversationChatRoute(currentEntry?.destination?.route)
+
                     ScreenSurface {
                         Box(Modifier.fillMaxSize()) {
-                            NavHost(
-                            navController = navController,
-                            startDestination = startDestination!!,
-                            enterTransition = { rootNavEnterTransition() },
-                            exitTransition = { rootNavExitTransition() },
-                            popEnterTransition = { rootNavPopEnterTransition() },
-                            popExitTransition = { rootNavPopExitTransition() },
-                        ) {
+                            Row(Modifier.fillMaxSize()) {
+                                if (showConversationListDetail) {
+                                    Box(
+                                        modifier = Modifier
+                                            .width(360.dp)
+                                            .fillMaxHeight(),
+                                    ) {
+                                        MainScreen(
+                                            sharedTransitionScope = this@SharedTransitionLayout,
+                                            snackbarHostState = profileLookupSnackbarHostState,
+                                            listPaneOnly = true,
+                                        )
+                                    }
+                                    VerticalDivider()
+                                }
+                                Box(Modifier.weight(1f).fillMaxSize()) {
+                                    NavHost(
+                                        navController = navController,
+                                        startDestination = startDestination!!,
+                                        enterTransition = { rootNavEnterTransition() },
+                                        exitTransition = { rootNavExitTransition() },
+                                        popEnterTransition = { rootNavPopEnterTransition() },
+                                        popExitTransition = { rootNavPopExitTransition() },
+                                    ) {
                             composable("serverConfig") {
                                 ServerConfigScreen()
                             }
@@ -574,7 +618,7 @@ fun App(
                                 ),
                             ) { entry ->
                                 val focusField = EditProfileFocusField.fromArg(
-                                    entry.arguments?.getString(ProfileRoutes.ARG_FOCUS),
+                                    entry.savedStateHandle.get<String>(ProfileRoutes.ARG_FOCUS),
                                 )
                                 EditProfileScreen(
                                     onBack = { navController.navigateUp() },
@@ -733,8 +777,10 @@ fun App(
                                 ApiClient.onAuthError = null
                             }
                         }
+                                }
+                            }
 
-                        CallOverlay(Modifier.fillMaxSize())
+                            CallOverlay(Modifier.fillMaxSize())
                         }
                     }
                 }

app/shared/src/commonMain/kotlin/ru/fromchat/ui/calls/LiveKitCallWebPage.kt

@@ -0,0 +1,221 @@
+package ru.fromchat.ui.calls
+
+/**
+ * Shared LiveKit JS page for iOS [WKWebView] and desktop JavaFX [WebView].
+ * Native LiveKit SDKs are used on Android; desktop has no JVM SDK.
+ */
+internal object LiveKitCallWebPage {
+    private const val LIVEKIT_CDN =
+        "https://cdn.jsdelivr.net/npm/livekit-client@2.15.4/dist/livekit-client.umd.min.js"
+
+    val html: String = """
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8"/>
+<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"/>
+<style>
+  html, body {
+    margin: 0; padding: 0; width: 100%; height: 100%;
+    background: #121212; overflow: hidden; font-family: system-ui, sans-serif;
+  }
+  #stage { position: relative; width: 100%; height: 100%; background: #000; }
+  #remoteVideo, #remoteAudioHost video {
+    position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: #000;
+  }
+  #localVideo {
+    position: absolute; right: 12px; top: 12px; width: 28%; max-width: 160px;
+    aspect-ratio: 3/4; object-fit: cover; border-radius: 12px; background: #333;
+    z-index: 2; transform: scaleX(-1);
+  }
+  #status {
+    position: absolute; left: 16px; right: 16px; top: 42%;
+    text-align: center; color: #e8e8e8; font-size: 15px; z-index: 3;
+    pointer-events: none;
+  }
+  #remoteAudioHost { position: absolute; width: 0; height: 0; overflow: hidden; }
+</style>
+</head>
+<body>
+<div id="stage">
+  <video id="remoteVideo" autoplay playsinline></video>
+  <video id="localVideo" autoplay playsinline muted></video>
+  <div id="remoteAudioHost"></div>
+  <div id="status">Connecting…</div>
+</div>
+<script src="$LIVEKIT_CDN"></script>
+<script>
+(function () {
+  var LK = window.LivekitClient;
+  var room = null;
+  var statusEl = document.getElementById("status");
+  var remoteVideo = document.getElementById("remoteVideo");
+  var localVideo = document.getElementById("localVideo");
+  var remoteAudioHost = document.getElementById("remoteAudioHost");
+
+  function setStatus(text) {
+    if (statusEl) statusEl.textContent = text || "";
+  }
+
+  function notifyNative(method, message) {
+    try {
+      if (window.FromChatNative && typeof window.FromChatNative[method] === "function") {
+        window.FromChatNative[method](message || "");
+        return;
+      }
+    } catch (e) {}
+    try {
+      if (window.webkit && window.webkit.messageHandlers && window.webkit.messageHandlers.FromChatCall) {
+        window.webkit.messageHandlers.FromChatCall.postMessage({
+          method: method,
+          message: message || ""
+        });
+      }
+    } catch (e2) {}
+  }
+
+  function attachRemoteTrack(track) {
+    if (!track) return;
+    if (track.kind === "video") {
+      track.attach(remoteVideo);
+      setStatus("");
+    } else if (track.kind === "audio") {
+      var el = track.attach();
+      remoteAudioHost.appendChild(el);
+    }
+  }
+
+  function detachAll() {
+    try {
+      if (room) {
+        room.remoteParticipants.forEach(function (p) {
+          p.trackPublications.forEach(function (pub) {
+            if (pub.track) pub.track.detach();
+          });
+        });
+      }
+    } catch (e) {}
+    remoteAudioHost.innerHTML = "";
+  }
+
+  async function connect(url, token) {
+    if (!LK) {
+      setStatus("LiveKit failed to load");
+      notifyNative("onConnectFailed", "LiveKit client failed to load");
+      return;
+    }
+    try {
+      if (room) {
+        await room.disconnect();
+        room = null;
+      }
+      detachAll();
+      setStatus("Connecting…");
+      room = new LK.Room({ adaptiveStream: true, dynacast: true });
+      room.on(LK.RoomEvent.TrackSubscribed, function (track) {
+        attachRemoteTrack(track);
+      });
+      room.on(LK.RoomEvent.TrackUnsubscribed, function (track) {
+        try { track.detach(); } catch (e) {}
+      });
+      room.on(LK.RoomEvent.Disconnected, function () {
+        setStatus("");
+      });
+      room.on(LK.RoomEvent.MediaDevicesError, function (e) {
+        notifyNative("onConnectFailed", (e && e.message) ? e.message : "Media device error");
+      });
+      await room.connect(url, token);
+      await room.localParticipant.setMicrophoneEnabled(true);
+      try {
+        await room.localParticipant.setCameraEnabled(true);
+      } catch (camErr) {
+        // Audio-only is fine if camera is denied / unavailable.
+      }
+      var camPub = room.localParticipant.getTrackPublication(LK.Track.Source.Camera);
+      if (camPub && camPub.track) {
+        camPub.track.attach(localVideo);
+      }
+      room.remoteParticipants.forEach(function (p) {
+        p.trackPublications.forEach(function (pub) {
+          if (pub.isSubscribed && pub.track) attachRemoteTrack(pub.track);
+        });
+      });
+      setStatus("");
+      notifyNative("onConnected", "");
+    } catch (err) {
+      var msg = (err && err.message) ? err.message : String(err);
+      setStatus(msg);
+      notifyNative("onConnectFailed", msg);
+    }
+  }
+
+  window.FromChatCallCtl = {
+    setMicEnabled: function (on) {
+      if (!room) return Promise.resolve();
+      return room.localParticipant.setMicrophoneEnabled(!!on);
+    },
+    setCamEnabled: function (on) {
+      if (!room) return Promise.resolve();
+      return room.localParticipant.setCameraEnabled(!!on).then(function () {
+        var camPub = room.localParticipant.getTrackPublication(LK.Track.Source.Camera);
+        if (on && camPub && camPub.track) {
+          camPub.track.attach(localVideo);
+        } else if (!on) {
+          try { localVideo.srcObject = null; } catch (e) {}
+        }
+      });
+    },
+    disconnect: function () {
+      if (!room) return Promise.resolve();
+      var r = room;
+      room = null;
+      detachAll();
+      return r.disconnect();
+    },
+    connect: connect
+  };
+
+  window.fromChatConnect = connect;
+})();
+</script>
+</body>
+</html>
+""".trimIndent()
+
+    fun connectScript(serverUrl: String, token: String): String {
+        val url = jsonStringLiteral(serverUrl)
+        val tok = jsonStringLiteral(token)
+        return "window.fromChatConnect($url, $tok);"
+    }
+
+    fun setMicScript(enabled: Boolean): String =
+        "window.FromChatCallCtl && window.FromChatCallCtl.setMicEnabled(${if (enabled) "true" else "false"});"
+
+    fun setCamScript(enabled: Boolean): String =
+        "window.FromChatCallCtl && window.FromChatCallCtl.setCamEnabled(${if (enabled) "true" else "false"});"
+
+    fun disconnectScript(): String =
+        "window.FromChatCallCtl && window.FromChatCallCtl.disconnect();"
+
+    private fun jsonStringLiteral(value: String): String = buildString {
+        append('"')
+        value.forEach { ch ->
+            when (ch) {
+                '\\' -> append("\\\\")
+                '"' -> append("\\\"")
+                '\n' -> append("\\n")
+                '\r' -> append("\\r")
+                '\t' -> append("\\t")
+                else -> {
+                    if (ch.code < 0x20) {
+                        append("\\u")
+                        append(ch.code.toString(16).padStart(4, '0'))
+                    } else {
+                        append(ch)
+                    }
+                }
+            }
+        }
+        append('"')
+    }
+}

app/shared/src/commonMain/kotlin/ru/fromchat/ui/calls/NotifyIncomingCall.kt

@@ -0,0 +1,4 @@
+package ru.fromchat.ui.calls
+
+/** Best-effort OS notification for an incoming call (desktop tray; no-op elsewhere). */
+internal expect fun notifyIncomingCall(title: String, body: String)

app/shared/src/commonMain/kotlin/ru/fromchat/ui/calls/WebCallInCallControls.kt

@@ -0,0 +1,107 @@
+package ru.fromchat.ui.calls
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.CallEnd
+import androidx.compose.material.icons.filled.Mic
+import androidx.compose.material.icons.filled.MicOff
+import androidx.compose.material.icons.filled.Videocam
+import androidx.compose.material.icons.filled.VideocamOff
+import androidx.compose.material3.FilledIconButton
+import androidx.compose.material3.FilledTonalIconButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButtonDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import org.jetbrains.compose.resources.stringResource
+import ru.fromchat.Res
+import ru.fromchat.cd_call_camera
+import ru.fromchat.cd_call_end
+import ru.fromchat.cd_call_mic
+
+/** Mic / camera / end controls for WebView-based LiveKit call UIs (iOS + desktop). */
+@Composable
+internal fun WebCallInCallControls(
+    micOn: Boolean,
+    camOn: Boolean,
+    onMicToggle: () -> Unit,
+    onCamToggle: () -> Unit,
+    onEndCall: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Row(
+        modifier = modifier
+            .fillMaxWidth()
+            .padding(horizontal = 20.dp, vertical = 28.dp),
+        horizontalArrangement = Arrangement.Center,
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        FilledTonalIconButton(
+            onClick = onMicToggle,
+            modifier = Modifier.size(52.dp),
+            colors = IconButtonDefaults.filledTonalIconButtonColors(
+                containerColor = if (micOn) {
+                    MaterialTheme.colorScheme.secondaryContainer
+                } else {
+                    MaterialTheme.colorScheme.errorContainer
+                },
+                contentColor = if (micOn) {
+                    MaterialTheme.colorScheme.onSecondaryContainer
+                } else {
+                    MaterialTheme.colorScheme.onErrorContainer
+                },
+            ),
+        ) {
+            Icon(
+                imageVector = if (micOn) Icons.Filled.Mic else Icons.Filled.MicOff,
+                contentDescription = stringResource(Res.string.cd_call_mic),
+            )
+        }
+        Spacer(Modifier.size(10.dp))
+        FilledTonalIconButton(
+            onClick = onCamToggle,
+            modifier = Modifier.size(52.dp),
+            colors = IconButtonDefaults.filledTonalIconButtonColors(
+                containerColor = if (camOn) {
+                    MaterialTheme.colorScheme.secondaryContainer
+                } else {
+                    MaterialTheme.colorScheme.errorContainer
+                },
+                contentColor = if (camOn) {
+                    MaterialTheme.colorScheme.onSecondaryContainer
+                } else {
+                    MaterialTheme.colorScheme.onErrorContainer
+                },
+            ),
+        ) {
+            Icon(
+                imageVector = if (camOn) Icons.Filled.Videocam else Icons.Filled.VideocamOff,
+                contentDescription = stringResource(Res.string.cd_call_camera),
+            )
+        }
+        Spacer(Modifier.size(18.dp))
+        FilledIconButton(
+            onClick = onEndCall,
+            modifier = Modifier.size(56.dp),
+            shape = CircleShape,
+            colors = IconButtonDefaults.filledIconButtonColors(
+                containerColor = MaterialTheme.colorScheme.error,
+                contentColor = MaterialTheme.colorScheme.onError,
+            ),
+        ) {
+            Icon(
+                imageVector = Icons.Filled.CallEnd,
+                contentDescription = stringResource(Res.string.cd_call_end),
+            )
+        }
+    }
+}

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/AttachmentPreview.kt

@@ -1,5 +1,3 @@
-@file:OptIn(ExperimentalHazeMaterialsApi::class)
-
 package ru.fromchat.ui.chat
 
 import androidx.compose.animation.AnimatedContent
@@ -68,10 +66,10 @@ import androidx.compose.ui.unit.IntSize
 import androidx.compose.ui.unit.dp
 import coil3.compose.AsyncImage
 import com.pr0gramm3r101.utils.crypto.Base64
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -122,7 +120,6 @@ internal fun isImageFilename(name: String): Boolean =
     name.endsWith(".png", true) || name.endsWith(".jpg", true) ||
         name.endsWith(".jpeg", true) || name.endsWith(".gif", true) || name.endsWith(".webp", true)
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 fun AttachmentPreview(
     file: DmFile?,
@@ -313,7 +310,7 @@ fun AttachmentPreview(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class, ExperimentalMaterial3ExpressiveApi::class)
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
 private fun ChatImageTileContent(
     messageId: Int,
@@ -458,7 +455,8 @@ private fun ChatImageTileContent(
 
     val imageContentScale = ContentScale.Crop
     val tilePlaceholderColor = MaterialTheme.colorScheme.surfaceContainerHigh.copy(alpha = 0.42f)
-    val thumbHazeState = rememberHazeState(blurEnabled = true)
+    val thumbHazeState = rememberHazeState()
+    val thumbOverlayHazeStyle = HazeMaterials.thin()
 
     LaunchedEffect(messageId, fileIndex, cacheClientId) {
         DecryptedImageCache.getCached(messageId, fileIndex, cacheClientId)?.let { uri ->
@@ -793,10 +791,11 @@ private fun ChatImageTileContent(
                                     Box(
                                         modifier = Modifier
                                             .fillMaxSize()
-                                            .hazeEffect(
-                                                state = thumbHazeState,
-                                                style = HazeMaterials.thin(),
-                                            ),
+                                            .hazeEffect(state = thumbHazeState) {
+                                                blurEffect {
+                                                    style = thumbOverlayHazeStyle
+                                                }
+                                            },
                                     )
                                 }
                             }
@@ -918,7 +917,6 @@ private fun ChatImageTileContent(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun DownloadCancelledImageOverlay(
     isAuthor: Boolean,
@@ -926,9 +924,14 @@ private fun DownloadCancelledImageOverlay(
     modifier: Modifier = Modifier,
 ) {
     val scrim = MaterialTheme.colorScheme.scrim.copy(alpha = 0.38f)
+    val overlayHazeStyle = HazeMaterials.thin()
     Box(
         modifier = modifier
-            .hazeEffect(style = HazeMaterials.thin())
+            .hazeEffect {
+                blurEffect {
+                    style = overlayHazeStyle
+                }
+            }
             .background(MaterialTheme.colorScheme.scrim.copy(alpha = 0.12f)),
         contentAlignment = Alignment.Center,
     ) {
@@ -958,7 +961,6 @@ private fun DownloadCancelledImageOverlay(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun UploadingImageOverlay(
     model: String?,
@@ -969,12 +971,17 @@ private fun UploadingImageOverlay(
     onCancelUpload: (() -> Unit)? = null,
     modifier: Modifier = Modifier,
 ) {
+    val overlayHazeStyle = HazeMaterials.thin()
     Box(modifier = modifier) {
         Box(
             modifier = Modifier
                 .matchParentSize()
                 .clip(clipShape)
-                .hazeEffect(style = HazeMaterials.thin())
+                .hazeEffect {
+                    blurEffect {
+                        style = overlayHazeStyle
+                    }
+                }
         ) {
             when {
                 previewBitmap != null -> {
@@ -1084,7 +1091,6 @@ internal fun ExpressiveUploadIndicator(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun PendingImageContent(
     uri: String,
@@ -1260,10 +1266,15 @@ private fun CorruptedImagePlaceholder(
     modifier: Modifier = Modifier,
     clipShape: RoundedCornerShape = attachmentImageCornerShape(isAuthor = false),
 ) {
+    val overlayHazeStyle = HazeMaterials.thin()
     Box(
         modifier = modifier
             .clip(clipShape)
-            .hazeEffect(style = HazeMaterials.thin()),
+            .hazeEffect {
+                blurEffect {
+                    style = overlayHazeStyle
+                }
+            },
         contentAlignment = Alignment.Center,
     ) {
         Icon(

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/ChatInput.kt

@@ -72,6 +72,7 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import coil3.compose.AsyncImage
 import dev.chrisbanes.haze.HazeState
+import dev.chrisbanes.haze.blur.blurEffect
 import dev.chrisbanes.haze.hazeEffect
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
@@ -244,6 +245,7 @@ fun ChatInput(
     isReadOnly: Boolean = false,
     onReadOnlyMessageClick: () -> Unit = {},
     snackbarHostState: SnackbarHostState? = null,
+    hazeBlurEnabled: Boolean = true,
 ) {
     val composerHazeStyle = rememberChatSurfaceContainerHazeStyle()
     val scope = rememberCoroutineScope()
@@ -313,7 +315,12 @@ fun ChatInput(
                 modifier = Modifier
                     .fillMaxWidth()
                     .clip(pillShape)
-                    .hazeEffect(state = hazeState, style = composerHazeStyle)
+                    .hazeEffect(state = hazeState) {
+                        blurEffect {
+                            blurEnabled = hazeBlurEnabled
+                            style = composerHazeStyle
+                        }
+                    }
                     .clickable(enabled = true) { onReadOnlyMessageClick() },
             ) {
                 Text(
@@ -344,7 +351,12 @@ fun ChatInput(
                             .fillMaxWidth()
                             .background(MaterialTheme.colorScheme.surfaceContainer, pillShape)
                             .clip(pillShape)
-                            .hazeEffect(state = hazeState, style = composerHazeStyle),
+                            .hazeEffect(state = hazeState) {
+                                blurEffect {
+                                    blurEnabled = hazeBlurEnabled
+                                    style = composerHazeStyle
+                                }
+                            },
                     ) {
                         AnimatedPreviewBar(replyTo) { reply ->
                             val replySubtitle = if (reply.isContentCorrupted) {
@@ -550,10 +562,14 @@ fun ChatInput(
                         modifier = Modifier
                             .fillMaxSize()
                             .background(actionBackground)
-                            .hazeEffect(state = hazeState, style = composerHazeStyle) {
-                                // Keep the node in the tree in both directions; fading alpha avoids the
-                                // frosted layer popping on over the color when send -> voice.
-                                alpha = hazeOverlayAlpha
+                            .hazeEffect(state = hazeState) {
+                                blurEffect {
+                                    // Keep the node in the tree in both directions; fading alpha avoids the
+                                    // frosted layer popping on over the color when send -> voice.
+                                    blurEnabled = hazeBlurEnabled
+                                    style = composerHazeStyle
+                                    alpha = hazeOverlayAlpha
+                                }
                             },
                     )
                     AnimatedContent(

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/ChatScreen.kt

@@ -79,11 +79,11 @@ import ru.fromchat.utils.rememberRegistrationDateFormatStrings
 import com.pr0gramm3r101.utils.resetFocus
 import com.pr0gramm3r101.utils.supportClipboardManagerImpl
 import dev.chrisbanes.haze.HazeState
-import dev.chrisbanes.haze.HazeProgressive
+import dev.chrisbanes.haze.blur.HazeProgressive
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import kotlin.math.roundToInt
 import kotlinx.coroutines.Dispatchers
@@ -157,7 +157,7 @@ import ru.fromchat.utils.rememberLastSeenFormatStrings
 import kotlin.time.Duration.Companion.milliseconds
 import kotlin.time.Duration.Companion.seconds
 
-@OptIn(ExperimentalMaterial3Api::class, ExperimentalHazeMaterialsApi::class)
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun ChatScreen(
     panel: ChatPanel,
@@ -426,9 +426,8 @@ fun ChatScreen(
     val keyboardController = LocalSoftwareKeyboardController.current
     val focusManager = LocalFocusManager.current
     val profileUserId = panelState.profileUserId
-    val hazeState = rememberHazeState(
-        blurEnabled = !(panelState.isLoading && panelState.messages.isEmpty())
-    )
+    val hazeState = rememberHazeState()
+    val hazeBlurEnabled = !(panelState.isLoading && panelState.messages.isEmpty())
 
     val currentTypingUsers = panelState.typingUsers // Directly use from panelState
     val statusMap by UserStatusStore.status.collectAsState()
@@ -816,16 +815,21 @@ fun ChatScreen(
             // floating header Box only; avoids extra top inset on the fade / list and duplicate “padding”.
             contentWindowInsets = WindowInsets.navigationBars,
             bottomBar = {
+                val bottomBarHazeStyle = HazeMaterials.thin()
                 Column(
                     modifier = Modifier
                         .windowInsetsPadding(WindowInsets.ime)
                         .fillMaxWidth()
                         .background(MaterialTheme.colorScheme.surfaceContainer)
-                        .hazeEffect(state = hazeState, style = HazeMaterials.thin()) {
-                            progressive = HazeProgressive.verticalGradient(
-                                startIntensity = 0f,
-                                endIntensity = 1f,
-                            )
+                        .hazeEffect(state = hazeState) {
+                            blurEffect {
+                                blurEnabled = hazeBlurEnabled
+                                style = bottomBarHazeStyle
+                                progressive = HazeProgressive.verticalGradient(
+                                    startIntensity = 0f,
+                                    endIntensity = 1f,
+                                )
+                            }
                         }
                 ) {
                     if (peerDeleted && dmRecipientId != null) {
@@ -1045,6 +1049,7 @@ fun ChatScreen(
                         hazeState = hazeState,
                         supportsAttachments = panel.supportsAttachments,
                         isReadOnly = isReadOnly,
+                        hazeBlurEnabled = hazeBlurEnabled,
                         onReadOnlyMessageClick = {
                             if (isReadOnly) {
                                 showSuspendedSupportSheet = true
@@ -1383,11 +1388,13 @@ fun ChatScreen(
                                 },
                                 contentDescription = scrollToBottomCd,
                                 hazeState = hazeState,
+                                hazeBlurEnabled = hazeBlurEnabled,
                             )
                         }
 
                         ChatTopBar(
                             hazeState = hazeState,
+                            hazeBlurEnabled = hazeBlurEnabled,
                             onBack = {
                                 runNav { navController.navigateUp() }
                             },
@@ -1583,6 +1590,7 @@ private fun ChatScrollToBottomButton(
     contentDescription: String,
     hazeState: HazeState,
     modifier: Modifier = Modifier,
+    hazeBlurEnabled: Boolean = true,
 ) {
     val hazeStyle = rememberChatSurfaceContainerHazeStyle()
     Box(
@@ -1598,7 +1606,12 @@ private fun ChatScrollToBottomButton(
             modifier = Modifier
                 .fillMaxSize()
                 .background(MaterialTheme.colorScheme.surfaceContainer.copy(alpha = 0.91f))
-                .hazeEffect(state = hazeState, style = hazeStyle),
+                .hazeEffect(state = hazeState) {
+                    blurEffect {
+                        blurEnabled = hazeBlurEnabled
+                        style = hazeStyle
+                    }
+                },
         )
         Icon(
             imageVector = Icons.Rounded.KeyboardArrowDown,

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/ChatTopBar.kt

@@ -62,8 +62,9 @@ import androidx.compose.ui.unit.LayoutDirection
 import androidx.compose.ui.unit.dp
 import com.pr0gramm3r101.utils.conditional
 import dev.chrisbanes.haze.HazeState
-import dev.chrisbanes.haze.HazeStyle
-import dev.chrisbanes.haze.HazeTint
+import dev.chrisbanes.haze.blur.HazeBlurStyle
+import dev.chrisbanes.haze.blur.HazeColorEffect
+import dev.chrisbanes.haze.blur.blurEffect
 import dev.chrisbanes.haze.hazeEffect
 import org.jetbrains.compose.resources.stringResource
 import ru.fromchat.Res
@@ -325,6 +326,7 @@ fun ChatTopBar(
     callContentDescription: String,
     titleChrome: @Composable () -> Unit,
     modifier: Modifier = Modifier,
+    hazeBlurEnabled: Boolean = true,
 ) {
     val bottomCornerRadius = ChatFloatingHeaderBottomArcRadius
     // [BottomInsetTopBarShape] draws the arc in the strip from y = (content height) .. (content + r);
@@ -370,6 +372,7 @@ fun ChatTopBar(
         val layoutHeight = topBarPlaceable.height + arcExtentPx
 
         val bgPlaceable = subcompose("background") {
+            val hazeStyle = rememberChatSurfaceContainerHazeStyle()
             Box(
                 modifier = Modifier
                     .fillMaxSize()
@@ -379,7 +382,12 @@ fun ChatTopBar(
                         }
                     )
                     .background(MaterialTheme.colorScheme.surfaceContainer.copy(alpha = 0.91f))
-                    .hazeEffect(state = hazeState, style = rememberChatSurfaceContainerHazeStyle()),
+                    .hazeEffect(state = hazeState) {
+                        blurEffect {
+                            blurEnabled = hazeBlurEnabled
+                            style = hazeStyle
+                        }
+                    },
             )
         }.first().measure(Constraints.fixed(layoutWidth, layoutHeight))
 
@@ -447,18 +455,21 @@ private class BottomInsetTopBarShape(private val cornerRadius: Dp) : Shape {
 }
 
 /**
- * [HazeStyle] for chat chrome using only [androidx.compose.material3.MaterialTheme.colorScheme.surfaceContainer]
- * (24dp blur + luminance-scaled tint, slightly denser than old “thin” defaults), without [dev.chrisbanes.haze.materials.HazeMaterials].
+ * [HazeBlurStyle] for chat chrome using only [androidx.compose.material3.MaterialTheme.colorScheme.surfaceContainer]
+ * (24dp blur + luminance-scaled tint, slightly denser than old “thin” defaults), without
+ * [dev.chrisbanes.haze.blur.materials.HazeMaterials].
  */
 @Composable
-fun rememberChatSurfaceContainerHazeStyle(): HazeStyle {
+fun rememberChatSurfaceContainerHazeStyle(): HazeBlurStyle {
     val surface = MaterialTheme.colorScheme.surfaceContainer
 
     return remember(surface) {
-        HazeStyle(
+        HazeBlurStyle(
             blurRadius = 24.dp,
             backgroundColor = surface,
-            tint = HazeTint(surface.copy(alpha = if (surface.luminance() >= 0.5f) 0.74f else 0.79f)),
+            colorEffect = HazeColorEffect.tint(
+                surface.copy(alpha = if (surface.luminance() >= 0.5f) 0.74f else 0.79f),
+            ),
         )
     }
 }

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/MessageItem.kt

@@ -534,7 +534,7 @@ fun MessageItem(
             BoxWithConstraints(
                 modifier = Modifier.weight(1f, fill = false)
             ) {
-                val maxBubbleWidth = maxWidth * 0.7f
+                val maxBubbleWidth = minOf(maxWidth * 0.7f, 420.dp)
 
                 Column(
                     horizontalAlignment = if (isAuthor) Alignment.End else Alignment.Start

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/utils/AttachmentPickers.kt

@@ -13,7 +13,7 @@ data class SelectedAttachment(
 /**
  * Platform-specific image picker. Returns a launch function.
  * On Android: PickVisualMedia (images only, multiple).
- * On iOS: Placeholder (no-op until Phase 4).
+ * On iOS: PHPickerViewController (images only, multiple).
  */
 @Composable
 expect fun rememberImagePicker(onResult: (List<String>) -> Unit): () -> Unit
@@ -21,7 +21,7 @@ expect fun rememberImagePicker(onResult: (List<String>) -> Unit): () -> Unit
 /**
  * Platform-specific file picker. Returns a launch function.
  * On Android: OpenDocument/OpenMultipleDocuments (SAF).
- * On iOS: Placeholder (no-op until Phase 4).
+ * On iOS: UIDocumentPickerViewController (multiple, asCopy).
  */
 @Composable
 expect fun rememberFilePicker(onResult: (List<String>) -> Unit): () -> Unit

app/shared/src/commonMain/kotlin/ru/fromchat/ui/components/ExpressiveStepFlow.kt

@@ -83,12 +83,12 @@ import androidx.compose.ui.zIndex
 import androidx.graphics.shapes.Morph
 import androidx.graphics.shapes.RoundedPolygon
 import com.pr0gramm3r101.utils.LastAnchoredBottomArrangement
-import dev.chrisbanes.haze.HazeProgressive
 import dev.chrisbanes.haze.HazeState
+import dev.chrisbanes.haze.blur.HazeProgressive
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.first
@@ -333,7 +333,6 @@ fun MorphedExpressiveStepButton(
 @OptIn(
     ExperimentalAnimationApi::class,
     ExperimentalMaterial3Api::class,
-    ExperimentalHazeMaterialsApi::class,
 )
 @Composable
 fun ExpressiveStepFlowScaffold(
@@ -549,6 +548,7 @@ fun ExpressiveStepFlowScaffold(
 
     @Composable
     fun HazeTopBar(hazeState: HazeState) {
+        val topBarHazeStyle = HazeMaterials.thin()
         TopAppBar(
             title = {},
             navigationIcon = {
@@ -566,11 +566,14 @@ fun ExpressiveStepFlowScaffold(
                 containerColor = Color.Transparent,
                 scrolledContainerColor = Color.Transparent,
             ),
-            modifier = Modifier.hazeEffect(state = hazeState, style = HazeMaterials.thin()) {
-                progressive = HazeProgressive.verticalGradient(
-                    startIntensity = 1f,
-                    endIntensity = 0f,
-                )
+            modifier = Modifier.hazeEffect(state = hazeState) {
+                blurEffect {
+                    style = topBarHazeStyle
+                    progressive = HazeProgressive.verticalGradient(
+                        startIntensity = 1f,
+                        endIntensity = 0f,
+                    )
+                }
             },
         )
     }

app/shared/src/commonMain/kotlin/ru/fromchat/ui/components/HazeActionButton.kt

@@ -12,30 +12,37 @@ import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
-import dev.chrisbanes.haze.HazeProgressive
 import dev.chrisbanes.haze.HazeState
-import dev.chrisbanes.haze.HazeStyle
+import dev.chrisbanes.haze.blur.HazeBlurStyle
+import dev.chrisbanes.haze.blur.HazeProgressive
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import ru.fromchat.ui.main.settings.SettingsStepHorizontalPadding
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 fun HazeBottomBar(
     hazeState: HazeState,
     modifier: Modifier = Modifier,
-    hazeStyle: HazeStyle? = null,
+    hazeStyle: HazeBlurStyle? = null,
     content: @Composable () -> Unit,
 ) {
+    val resolvedStyle = hazeStyle ?: HazeMaterials.thin()
     val effectModifier = if (hazeStyle != null) {
-        Modifier.hazeEffect(state = hazeState, style = hazeStyle)
+        Modifier.hazeEffect(state = hazeState) {
+            blurEffect {
+                style = resolvedStyle
+            }
+        }
     } else {
-        Modifier.hazeEffect(state = hazeState, style = HazeMaterials.thin()) {
-            progressive = HazeProgressive.verticalGradient(
-                startIntensity = 0f,
-                endIntensity = 1f,
-            )
+        Modifier.hazeEffect(state = hazeState) {
+            blurEffect {
+                style = resolvedStyle
+                progressive = HazeProgressive.verticalGradient(
+                    startIntensity = 0f,
+                    endIntensity = 1f,
+                )
+            }
         }
     }
     Column(
@@ -57,14 +64,13 @@ fun HazeBottomBar(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 fun HazeActionButton(
     onClick: () -> Unit,
     hazeState: HazeState,
     modifier: Modifier = Modifier,
     innerModifier: Modifier = Modifier,
-    hazeStyle: HazeStyle? = null,
+    hazeStyle: HazeBlurStyle? = null,
     enabled: Boolean = true,
     loading: Boolean = false,
     interactionSource: MutableInteractionSource? = null,
@@ -80,4 +86,4 @@ fun HazeActionButton(
             content = content,
         )
     }
-}
+}

app/shared/src/commonMain/kotlin/ru/fromchat/ui/main/MainScreen.kt

@@ -6,9 +6,11 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.WindowInsetsSides
 import androidx.compose.foundation.layout.asPaddingValues
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.imePadding
@@ -44,14 +46,18 @@ import androidx.compose.ui.layout.onSizeChanged
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.zIndex
+import com.pr0gramm3r101.utils.NavigationItem
+import com.pr0gramm3r101.utils.SimpleNavigationRail
+import com.pr0gramm3r101.utils.WindowWidthSizeClass
+import com.pr0gramm3r101.utils.currentWindowAdaptiveInfo
+import com.pr0gramm3r101.utils.widthSizeClass
 import dev.chrisbanes.haze.HazeState
-import dev.chrisbanes.haze.HazeStyle
-import dev.chrisbanes.haze.HazeTint
+import dev.chrisbanes.haze.blur.HazeBlurStyle
+import dev.chrisbanes.haze.blur.HazeColorEffect
+import dev.chrisbanes.haze.blur.blurEffect
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
 import dev.chrisbanes.haze.rememberHazeState
-import ru.fromchat.ui.chat.rememberChatSurfaceContainerHazeStyle
 import kotlinx.coroutines.launch
 import org.jetbrains.compose.resources.stringResource
 import ru.fromchat.Res
@@ -61,6 +67,7 @@ import ru.fromchat.contacts
 import ru.fromchat.profile
 import ru.fromchat.settings
 import ru.fromchat.ui.LocalNavController
+import ru.fromchat.ui.chat.rememberChatSurfaceContainerHazeStyle
 import ru.fromchat.ui.components.FromChatSnackbarHost
 import ru.fromchat.ui.components.Text
 import ru.fromchat.ui.main.chats.ChatContextMenuOverlayController
@@ -75,12 +82,17 @@ private const val PAGE_SETTINGS = 2
 private const val PAGE_PROFILE = 3
 private const val PAGE_COUNT = 4
 
-@OptIn(ExperimentalMaterial3Api::class, ExperimentalHazeMaterialsApi::class)
+/**
+ * @param listPaneOnly When true, renders only the chats list (no nav rail/bar) for use as the
+ * list side of an expanded list–detail conversation layout.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun MainScreen(
     sharedTransitionScope: SharedTransitionScope? = null,
     animatedVisibilityScope: AnimatedVisibilityScope? = null,
     snackbarHostState: SnackbarHostState? = null,
+    listPaneOnly: Boolean = false,
 ) {
     val effectiveSnackbarHostState = snackbarHostState ?: remember { SnackbarHostState() }
     val navController = LocalNavController.current
@@ -90,11 +102,14 @@ fun MainScreen(
     )
     val scope = rememberCoroutineScope()
     val density = LocalDensity.current
-    val navBarHazeState = rememberHazeState(blurEnabled = true)
+    val navBarHazeState = rememberHazeState()
     val navBarHazeStyle = rememberChatSurfaceContainerHazeStyle()
-    val contextMenuHazeState = rememberHazeState(blurEnabled = true)
+    val contextMenuHazeState = rememberHazeState()
     val chatContextMenuOverlay = remember { ChatContextMenuOverlayController() }
 
+    val useNavigationRail = !listPaneOnly &&
+        currentWindowAdaptiveInfo().widthSizeClass != WindowWidthSizeClass.COMPACT
+
     val selectedPage = pagerState.currentPage
     val isChatsPage = selectedPage == PAGE_CHATS
     val chatMenuBlurProgress = chatContextMenuOverlay.blurProgress
@@ -102,46 +117,83 @@ fun MainScreen(
     val statusBarTopDp = WindowInsets.statusBars.asPaddingValues().calculateTopPadding()
     var bottomChromeHeightDp by remember { mutableStateOf(0.dp) }
 
-    val mainChromeInsets = remember(statusBarTopDp, bottomChromeHeightDp) {
+    val mainChromeInsets = remember(statusBarTopDp, bottomChromeHeightDp, useNavigationRail, listPaneOnly) {
         MainChromeInsets(
             top = statusBarTopDp,
-            bottom = bottomChromeHeightDp,
+            bottom = if (useNavigationRail || listPaneOnly) 0.dp else bottomChromeHeightDp,
         )
     }
 
-    BoxWithConstraints(modifier = Modifier.fillMaxSize()) {
-        Box(
-            modifier = Modifier
-                .fillMaxSize()
-                .hazeSource(contextMenuHazeState),
-        ) {
-            Scaffold(
-                snackbarHost = {
-                    FromChatSnackbarHost(
-                        hostState = effectiveSnackbarHostState,
-                        modifier = Modifier.padding(bottom = mainChromeInsets.bottom),
-                    )
-                },
-                containerColor = Color.Transparent,
-                contentWindowInsets = WindowInsets(0, 0, 0, 0),
+    val chatsLabel = stringResource(Res.string.chats)
+    val contactsLabel = stringResource(Res.string.contacts)
+    val settingsLabel = stringResource(Res.string.settings)
+    val profileLabel = stringResource(Res.string.profile)
+
+    BoxWithConstraints(Modifier.fillMaxSize()) {
+        Row(Modifier.fillMaxSize()) {
+            if (useNavigationRail) {
+                SimpleNavigationRail(
+                    selectedItem = selectedPage,
+                    modifier = Modifier.fillMaxHeight(),
+                    NavigationItem(
+                        name = chatsLabel,
+                        selectedIcon = Icons.AutoMirrored.Filled.Chat,
+                        onClick = {
+                            scope.launch { pagerState.animateScrollToPage(PAGE_CHATS) }
+                        },
+                    ),
+                    NavigationItem(
+                        name = contactsLabel,
+                        selectedIcon = Icons.Filled.Contacts,
+                        onClick = {
+                            scope.launch { pagerState.animateScrollToPage(PAGE_CONTACTS) }
+                        },
+                    ),
+                    NavigationItem(
+                        name = settingsLabel,
+                        selectedIcon = Icons.Filled.Settings,
+                        onClick = {
+                            scope.launch { pagerState.animateScrollToPage(PAGE_SETTINGS) }
+                        },
+                    ),
+                    NavigationItem(
+                        name = profileLabel,
+                        selectedIcon = Icons.Filled.Person,
+                        onClick = {
+                            scope.launch { pagerState.animateScrollToPage(PAGE_PROFILE) }
+                        },
+                    ),
+                )
+            }
+
+            Box(
                 modifier = Modifier
-                    .fillMaxSize()
-                    .imePadding(),
+                    .weight(1f)
+                    .fillMaxHeight()
+                    .hazeSource(contextMenuHazeState),
             ) {
-                CompositionLocalProvider(LocalMainChromeInsets provides mainChromeInsets) {
-                    Box(
-                        modifier = Modifier
-                            .fillMaxSize()
-                            .hazeSource(navBarHazeState),
-                    ) {
-                        HorizontalPager(
-                            state = pagerState,
-                            modifier = Modifier.fillMaxSize(),
-                            beyondViewportPageCount = 1,
-                        ) { page ->
-                            when (page) {
-                                PAGE_CHATS -> ChatsTab(
-                                    isVisible = isChatsPage,
+                Scaffold(
+                    snackbarHost = {
+                        FromChatSnackbarHost(
+                            hostState = effectiveSnackbarHostState,
+                            modifier = Modifier.padding(bottom = mainChromeInsets.bottom),
+                        )
+                    },
+                    containerColor = Color.Transparent,
+                    contentWindowInsets = WindowInsets(0, 0, 0, 0),
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .imePadding(),
+                ) {
+                    CompositionLocalProvider(LocalMainChromeInsets provides mainChromeInsets) {
+                        Box(
+                            modifier = Modifier
+                                .fillMaxSize()
+                                .hazeSource(navBarHazeState),
+                        ) {
+                            if (listPaneOnly) {
+                                ChatsTab(
+                                    isVisible = true,
                                     onOpenSearch = {
                                         navController.navigate("search/conversations")
                                     },
@@ -149,81 +201,118 @@ fun MainScreen(
                                     sharedTransitionScope = sharedTransitionScope,
                                     animatedVisibilityScope = animatedVisibilityScope,
                                 )
-                                PAGE_CONTACTS -> ContactsTab()
-                                PAGE_SETTINGS -> SettingsTab()
-                                PAGE_PROFILE -> {
-                                    ProfileScreen(
-                                        userId = ApiClient.user?.id,
-                                        onBack = {},
-                                        onChat = { _ -> },
-                                        modifier = Modifier
-                                            .fillMaxSize()
-                                            .mainPagerBottomInset(),
-                                        onOpenSettings = {
-                                            scope.launch { pagerState.animateScrollToPage(PAGE_SETTINGS) }
-                                        },
-                                    )
+                            } else {
+                                HorizontalPager(
+                                    state = pagerState,
+                                    modifier = Modifier.fillMaxSize(),
+                                    beyondViewportPageCount = 1,
+                                ) { page ->
+                                    when (page) {
+                                        PAGE_CHATS -> ChatsTab(
+                                            isVisible = isChatsPage,
+                                            onOpenSearch = {
+                                                navController.navigate("search/conversations")
+                                            },
+                                            chatContextMenuOverlay = chatContextMenuOverlay,
+                                            sharedTransitionScope = sharedTransitionScope,
+                                            animatedVisibilityScope = animatedVisibilityScope,
+                                        )
+                                        PAGE_CONTACTS -> ContactsTab()
+                                        PAGE_SETTINGS -> SettingsTab()
+                                        PAGE_PROFILE -> {
+                                            ProfileScreen(
+                                                userId = ApiClient.user?.id,
+                                                onBack = {},
+                                                onChat = { _ -> },
+                                                modifier = Modifier
+                                                    .fillMaxSize()
+                                                    .mainPagerBottomInset(),
+                                                onOpenSettings = {
+                                                    scope.launch {
+                                                        pagerState.animateScrollToPage(PAGE_SETTINGS)
+                                                    }
+                                                },
+                                            )
+                                        }
+                                        else -> Unit
+                                    }
                                 }
-                                else -> Unit
                             }
                         }
                     }
                 }
-            }
 
-            Column(
-                modifier = Modifier
-                    .align(Alignment.BottomCenter)
-                    .fillMaxWidth()
-                    .zIndex(1f)
-                    .imePadding()
-                    .onSizeChanged { size ->
-                        val measured = with(density) { size.height.toDp() }
-                        if (measured != bottomChromeHeightDp) {
-                            bottomChromeHeightDp = measured
+                if (!useNavigationRail && !listPaneOnly) {
+                    Column(
+                        modifier = Modifier
+                            .align(Alignment.BottomCenter)
+                            .fillMaxWidth()
+                            .zIndex(1f)
+                            .imePadding()
+                            .onSizeChanged { size ->
+                                val measured = with(density) { size.height.toDp() }
+                                if (measured != bottomChromeHeightDp) {
+                                    bottomChromeHeightDp = measured
+                                }
+                            }
+                            .background(MaterialTheme.colorScheme.surfaceContainer)
+                            .hazeEffect(state = navBarHazeState) {
+                                blurEffect {
+                                    style = navBarHazeStyle
+                                }
+                            },
+                    ) {
+                        NavigationBar(
+                            modifier = Modifier.fillMaxWidth(),
+                            containerColor = Color.Transparent,
+                            tonalElevation = 0.dp,
+                            windowInsets = WindowInsets.navigationBars.only(WindowInsetsSides.Bottom),
+                        ) {
+                            NavigationBarItem(
+                                selected = selectedPage == PAGE_CHATS,
+                                onClick = {
+                                    scope.launch { pagerState.animateScrollToPage(PAGE_CHATS) }
+                                },
+                                label = { Text(chatsLabel) },
+                                icon = {
+                                    Icon(
+                                        Icons.AutoMirrored.Filled.Chat,
+                                        contentDescription = null,
+                                    )
+                                },
+                            )
+                            NavigationBarItem(
+                                selected = selectedPage == PAGE_CONTACTS,
+                                onClick = {
+                                    scope.launch { pagerState.animateScrollToPage(PAGE_CONTACTS) }
+                                },
+                                label = { Text(contactsLabel) },
+                                icon = {
+                                    Icon(Icons.Filled.Contacts, contentDescription = null)
+                                },
+                            )
+                            NavigationBarItem(
+                                selected = selectedPage == PAGE_SETTINGS,
+                                onClick = {
+                                    scope.launch { pagerState.animateScrollToPage(PAGE_SETTINGS) }
+                                },
+                                label = { Text(settingsLabel) },
+                                icon = {
+                                    Icon(Icons.Filled.Settings, contentDescription = null)
+                                },
+                            )
+                            NavigationBarItem(
+                                selected = selectedPage == PAGE_PROFILE,
+                                onClick = {
+                                    scope.launch { pagerState.animateScrollToPage(PAGE_PROFILE) }
+                                },
+                                label = { Text(profileLabel) },
+                                icon = {
+                                    Icon(Icons.Filled.Person, contentDescription = null)
+                                },
+                            )
                         }
                     }
-                    .background(MaterialTheme.colorScheme.surfaceContainer)
-                    .hazeEffect(state = navBarHazeState, style = navBarHazeStyle),
-            ) {
-                NavigationBar(
-                    modifier = Modifier.fillMaxWidth(),
-                    containerColor = Color.Transparent,
-                    tonalElevation = 0.dp,
-                    windowInsets = WindowInsets.navigationBars.only(WindowInsetsSides.Bottom),
-                ) {
-                    NavigationBarItem(
-                        selected = selectedPage == PAGE_CHATS,
-                        onClick = {
-                            scope.launch { pagerState.animateScrollToPage(PAGE_CHATS) }
-                        },
-                        label = { Text(stringResource(Res.string.chats)) },
-                        icon = { Icon(Icons.AutoMirrored.Filled.Chat, contentDescription = null) },
-                    )
-                    NavigationBarItem(
-                        selected = selectedPage == PAGE_CONTACTS,
-                        onClick = {
-                            scope.launch { pagerState.animateScrollToPage(PAGE_CONTACTS) }
-                        },
-                        label = { Text(stringResource(Res.string.contacts)) },
-                        icon = { Icon(Icons.Filled.Contacts, contentDescription = null) },
-                    )
-                    NavigationBarItem(
-                        selected = selectedPage == PAGE_SETTINGS,
-                        onClick = {
-                            scope.launch { pagerState.animateScrollToPage(PAGE_SETTINGS) }
-                        },
-                        label = { Text(stringResource(Res.string.settings)) },
-                        icon = { Icon(Icons.Filled.Settings, contentDescription = null) },
-                    )
-                    NavigationBarItem(
-                        selected = selectedPage == PAGE_PROFILE,
-                        onClick = {
-                            scope.launch { pagerState.animateScrollToPage(PAGE_PROFILE) }
-                        },
-                        label = { Text(stringResource(Res.string.profile)) },
-                        icon = { Icon(Icons.Filled.Person, contentDescription = null) },
-                    )
                 }
             }
         }
@@ -249,7 +338,6 @@ fun MainScreen(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun ChatContextMenuBlurLayer(
     hazeState: HazeState,
@@ -260,15 +348,16 @@ private fun ChatContextMenuBlurLayer(
     if (blurRadius <= 0.dp) return
 
     Box(
-        modifier = modifier.hazeEffect(
-            state = hazeState,
-            style = HazeStyle(
-                blurRadius = blurRadius,
-                tints = emptyList(),
-                backgroundColor = Color.Transparent,
-                noiseFactor = 0f,
-                fallbackTint = HazeTint(Color.Transparent),
-            ),
-        ),
+        modifier = modifier.hazeEffect(state = hazeState) {
+            blurEffect {
+                style = HazeBlurStyle(
+                    blurRadius = blurRadius,
+                    colorEffects = emptyList(),
+                    backgroundColor = Color.Transparent,
+                    noiseFactor = 0f,
+                    fallbackColorEffect = HazeColorEffect.tint(Color.Transparent),
+                )
+            }
+        },
     )
 }

app/shared/src/commonMain/kotlin/ru/fromchat/ui/main/chats/ChatsTab.kt

@@ -59,10 +59,10 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.ui.graphics.Color
 import dev.chrisbanes.haze.HazeState
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
@@ -340,20 +340,23 @@ private fun chatsTopAppBarColors(blurReveal: Float) = TopAppBarDefaults.topAppBa
     scrolledContainerColor = Color.Transparent,
 )
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun ChatsTopBarHazeBackdrop(
     hazeState: HazeState,
     blurReveal: Float,
+    blurEnabled: Boolean,
     modifier: Modifier = Modifier,
 ) {
+    val topBarHazeStyle = HazeMaterials.thin()
     Box(
         modifier = modifier
             .graphicsLayer { alpha = blurReveal.coerceIn(0f, 1f) }
-            .hazeEffect(
-                state = hazeState,
-                style = HazeMaterials.thin(),
-            ),
+            .hazeEffect(state = hazeState) {
+                blurEffect {
+                    this.blurEnabled = blurEnabled
+                    style = topBarHazeStyle
+                }
+            },
     )
 }
 
@@ -518,7 +521,7 @@ private fun ChatsSelectionTopBar(
     )
 }
 
-@OptIn(ExperimentalMaterial3Api::class, ExperimentalHazeMaterialsApi::class)
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun ChatsTab(
     isVisible: Boolean = true,
@@ -573,7 +576,7 @@ fun ChatsTab(
     val publicChatProfile = publicChatProfileFromFlow ?: publicChatProfileFromDisk
     val searchBarHint = stringResource(Res.string.search_title)
     val tabListState = rememberLazyListState()
-    val topChromeHazeState = rememberHazeState(blurEnabled = isVisible)
+    val topChromeHazeState = rememberHazeState()
     val statusMap by UserStatusStore.status.collectAsState()
     var subscribedDmUserIds by remember { mutableStateOf<Set<Int>>(emptySet()) }
     val statusSubscriptionScope = rememberCoroutineScope()
@@ -1032,6 +1035,7 @@ fun ChatsTab(
                 ChatsTopBarHazeBackdrop(
                     hazeState = topChromeHazeState,
                     blurReveal = topBarBlurReveal,
+                    blurEnabled = isVisible,
                     modifier = Modifier.matchParentSize(),
                 )
                 Box(modifier = Modifier.fillMaxWidth()) {

app/shared/src/commonMain/kotlin/ru/fromchat/ui/main/settings/DevicesScreen.kt

@@ -67,11 +67,11 @@ import coil3.compose.AsyncImage
 import com.pr0gramm3r101.components.Category
 import com.pr0gramm3r101.components.ListItem
 import com.pr0gramm3r101.utils.currentDeviceInfo
-import dev.chrisbanes.haze.HazeProgressive
+import dev.chrisbanes.haze.blur.HazeProgressive
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import io.ktor.client.network.sockets.ConnectTimeoutException
 import io.ktor.client.network.sockets.SocketTimeoutException
@@ -363,13 +363,13 @@ private fun DeviceSessionDetailBottomSheet(
     }
 }
 
-@OptIn(ExperimentalMaterial3Api::class, ExperimentalHazeMaterialsApi::class,
+@OptIn(ExperimentalMaterial3Api::class,
     ExperimentalMaterial3ExpressiveApi::class
 )
 @Composable
 fun DevicesScreen(onBack: () -> Unit) {
     val scope = rememberCoroutineScope()
-    val hazeState = rememberHazeState(blurEnabled = true)
+    val hazeState = rememberHazeState()
 
     val snackbarHostState = remember { SnackbarHostState() }
     val initialCache = remember { Settings.readDeviceSessionsCache() }
@@ -430,6 +430,7 @@ fun DevicesScreen(onBack: () -> Unit) {
         contentWindowInsets = WindowInsets.navigationBars,
         snackbarHost = { FromChatSnackbarHost(hostState = snackbarHostState) },
         topBar = {
+            val topBarHazeStyle = HazeMaterials.thin()
             TopAppBar(
                 title = {},
                 navigationIcon = {
@@ -441,14 +442,14 @@ fun DevicesScreen(onBack: () -> Unit) {
                     containerColor = Color.Transparent,
                     scrolledContainerColor = Color.Transparent
                 ),
-                modifier = Modifier.hazeEffect(
-                    state = hazeState,
-                    style = HazeMaterials.thin()
-                ) {
-                    progressive = HazeProgressive.verticalGradient(
-                        startIntensity = 1f,
-                        endIntensity = 0f,
-                    )
+                modifier = Modifier.hazeEffect(state = hazeState) {
+                    blurEffect {
+                        style = topBarHazeStyle
+                        progressive = HazeProgressive.verticalGradient(
+                            startIntensity = 1f,
+                            endIntensity = 0f,
+                        )
+                    }
                 }
             )
         },

app/shared/src/commonMain/kotlin/ru/fromchat/ui/main/settings/LogFilesScreen.kt

@@ -707,6 +707,7 @@ private fun formatLogFileSize(sizeBytes: Long): String {
     if (sizeBytes < 1024 * 1024) {
         return stringResource(Res.string.logs_file_size_kb, kb)
     }
-    val megabytes = "%.1f".format(sizeBytes / (1024f * 1024f))
+    val mb = sizeBytes / (1024.0 * 1024.0)
+    val megabytes = ((kotlin.math.round(mb * 10.0) / 10.0)).toString()
     return stringResource(Res.string.logs_file_size_mb, megabytes)
 }

app/shared/src/commonMain/kotlin/ru/fromchat/ui/main/settings/NotificationsScreen.kt

@@ -44,6 +44,7 @@ import ru.fromchat.settings_notifications_permission_required
 import ru.fromchat.settings_notifications_title
 import ru.fromchat.settings_push_notifications
 import ru.fromchat.settings_push_notifications_d
+import ru.fromchat.settings_push_notifications_unavailable
 import ru.fromchat.ui.components.FromChatSnackbarHost
 import ru.fromchat.ui.components.Text
 
@@ -84,48 +85,58 @@ fun NotificationsScreen(onBack: () -> Unit) {
             Category(
                 modifier = Modifier.padding(top = 16.dp)
             ) {
-                SwitchListItem(
-                    headline = stringResource(Res.string.settings_push_notifications),
-                    supportingText = stringResource(Res.string.settings_push_notifications_d),
-                    leadingContent = {
-                        Icon(Icons.Filled.Notifications, null)
-                    },
-                    checked = notificationsEnabled,
-                    onCheckedChange = { enabled ->
-                        coroutineScope.launch {
-                            if (enabled) {
-                                if (!areAppNotificationsEnabled()) {
-                                    if (!openAppNotificationSettings()) {
-                                        snackbarHostState.showSnackbar(message = unexpectedErrorText)
-                                    } else {
-                                        snackbarHostState.showSnackbar(message = notificationsPermissionText)
+                if (arePushNotificationsSupported()) {
+                    SwitchListItem(
+                        headline = stringResource(Res.string.settings_push_notifications),
+                        supportingText = stringResource(Res.string.settings_push_notifications_d),
+                        leadingContent = {
+                            Icon(Icons.Filled.Notifications, null)
+                        },
+                        checked = notificationsEnabled,
+                        onCheckedChange = { enabled ->
+                            coroutineScope.launch {
+                                if (enabled) {
+                                    if (!areAppNotificationsEnabled()) {
+                                        if (!openAppNotificationSettings()) {
+                                            snackbarHostState.showSnackbar(message = unexpectedErrorText)
+                                        } else {
+                                            snackbarHostState.showSnackbar(message = notificationsPermissionText)
+                                        }
+                                        return@launch
                                     }
-                                    return@launch
-                                }
 
-                                val registered = ensureFcmTokenRegistered()
-                                if (registered) {
-                                    notificationsEnabled = true
+                                    val registered = ensureFcmTokenRegistered()
+                                    if (registered) {
+                                        notificationsEnabled = true
+                                    } else {
+                                        snackbarHostState.showSnackbar(message = unexpectedErrorText)
+                                    }
                                 } else {
-                                    snackbarHostState.showSnackbar(message = unexpectedErrorText)
+                                    unregisterFcmTokenFromServer()
+                                    notificationsEnabled = false
                                 }
-                            } else {
-                                unregisterFcmTokenFromServer()
-                                notificationsEnabled = false
                             }
-                        }
-                    },
-                    divider = true
-                )
+                        },
+                        divider = true
+                    )
 
-                ListItem(
-                    headline = stringResource(Res.string.settings_notification_settings),
-                    supportingText = stringResource(Res.string.settings_notification_settings_d),
-                    leadingContent = {
-                        Icon(Icons.Filled.Settings, null)
-                    },
-                    onClick = { openAppNotificationSettings() }
-                )
+                    ListItem(
+                        headline = stringResource(Res.string.settings_notification_settings),
+                        supportingText = stringResource(Res.string.settings_notification_settings_d),
+                        leadingContent = {
+                            Icon(Icons.Filled.Settings, null)
+                        },
+                        onClick = { openAppNotificationSettings() }
+                    )
+                } else {
+                    ListItem(
+                        headline = stringResource(Res.string.settings_push_notifications),
+                        supportingText = stringResource(Res.string.settings_push_notifications_unavailable),
+                        leadingContent = {
+                            Icon(Icons.Filled.Notifications, null)
+                        },
+                    )
+                }
             }
         }
     }
@@ -140,4 +151,7 @@ expect fun openAppNotificationSettings(): Boolean
 /**
  * Returns true when notifications are currently enabled for this app, including runtime permission.
  */
-expect fun areAppNotificationsEnabled(): Boolean
+expect fun areAppNotificationsEnabled(): Boolean
+
+/** False on platforms without push delivery (e.g. iOS without APNs). */
+expect fun arePushNotificationsSupported(): Boolean

app/shared/src/commonMain/kotlin/ru/fromchat/ui/main/settings/server/ServerConfigScreen.kt

@@ -67,11 +67,11 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import com.pr0gramm3r101.utils.navigateAndWipeBackStack
 import com.pr0gramm3r101.utils.toDp
-import dev.chrisbanes.haze.HazeProgressive
+import dev.chrisbanes.haze.blur.HazeProgressive
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -129,7 +129,6 @@ private object ServerConfigLazyListIndices {
     ExperimentalMaterial3Api::class,
     ExperimentalMaterial3ExpressiveApi::class,
     ExperimentalAnimationApi::class,
-    ExperimentalHazeMaterialsApi::class,
 )
 @Composable
 fun ServerConfigScreen() {
@@ -331,6 +330,7 @@ fun ServerConfigScreen() {
                 }
             },
             topBar = {
+                val topBarHazeStyle = HazeMaterials.thin()
                 TopAppBar(
                     title = {},
                     navigationIcon = {
@@ -345,11 +345,14 @@ fun ServerConfigScreen() {
                         containerColor = Color.Transparent,
                         scrolledContainerColor = Color.Transparent
                     ),
-                    modifier = Modifier.hazeEffect(state = actionHazeState, style = HazeMaterials.thin()) {
-                        progressive = HazeProgressive.verticalGradient(
-                            startIntensity = 1f,
-                            endIntensity = 0f,
-                        )
+                    modifier = Modifier.hazeEffect(state = actionHazeState) {
+                        blurEffect {
+                            style = topBarHazeStyle
+                            progressive = HazeProgressive.verticalGradient(
+                                startIntensity = 1f,
+                                endIntensity = 0f,
+                            )
+                        }
                     }
                 )
             }

app/shared/src/commonMain/kotlin/ru/fromchat/ui/profile/EditProfileScreen.kt

@@ -47,11 +47,11 @@ import androidx.compose.ui.text.TextRange
 import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.unit.dp
-import dev.chrisbanes.haze.HazeProgressive
+import dev.chrisbanes.haze.blur.HazeProgressive
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
 import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
 import dev.chrisbanes.haze.rememberHazeState
 import io.ktor.client.call.body
 import io.ktor.client.plugins.ClientRequestException
@@ -110,7 +110,6 @@ private object EditProfileLazyListIndices {
     ExperimentalMaterial3Api::class,
     ExperimentalMaterial3ExpressiveApi::class,
     ExperimentalFoundationApi::class,
-    ExperimentalHazeMaterialsApi::class,
 )
 @Composable
 fun EditProfileScreen(
@@ -340,6 +339,7 @@ fun EditProfileScreen(
             }
         },
         topBar = {
+            val topBarHazeStyle = HazeMaterials.thin()
             TopAppBar(
                 title = { Text(stringResource(Res.string.profile_edit_title)) },
                 navigationIcon = {
@@ -367,11 +367,14 @@ fun EditProfileScreen(
                     containerColor = Color.Transparent,
                     scrolledContainerColor = Color.Transparent,
                 ),
-                modifier = Modifier.hazeEffect(state = hazeState, style = HazeMaterials.thin()) {
-                    progressive = HazeProgressive.verticalGradient(
-                        startIntensity = 1f,
-                        endIntensity = 0f,
-                    )
+                modifier = Modifier.hazeEffect(state = hazeState) {
+                    blurEffect {
+                        style = topBarHazeStyle
+                        progressive = HazeProgressive.verticalGradient(
+                            startIntensity = 1f,
+                            endIntensity = 0f,
+                        )
+                    }
                 },
             )
         },

app/shared/src/commonMain/kotlin/ru/fromchat/ui/profile/ProfileScreen.kt

@@ -37,11 +37,13 @@ import androidx.compose.ui.unit.Dp
 import androidx.navigation.NavController
 import com.pr0gramm3r101.components.ListItemPosition
 import com.pr0gramm3r101.utils.SupportClipboardManager
-import dev.chrisbanes.haze.HazeProgressive
 import dev.chrisbanes.haze.HazeState
+import dev.chrisbanes.haze.blur.HazeProgressive
+import dev.chrisbanes.haze.blur.blurEffect
+import dev.chrisbanes.haze.blur.materials.HazeMaterials
 import dev.chrisbanes.haze.hazeEffect
-import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
-import dev.chrisbanes.haze.materials.HazeMaterials
+import dev.chrisbanes.haze.hazeSource
+import dev.chrisbanes.haze.rememberHazeState
 import kotlinx.coroutines.CoroutineScope
 import ru.fromchat.api.local.db.store.PublicChatProfileCache
 import ru.fromchat.api.schema.chats.publicchat.PublicChatProfile
@@ -112,8 +114,6 @@ import com.pr0gramm3r101.components.ContextMenuPressable
 import com.pr0gramm3r101.components.ListItem
 import com.pr0gramm3r101.components.listItemPositionInGroup
 import com.pr0gramm3r101.utils.supportClipboardManagerImpl
-import dev.chrisbanes.haze.hazeSource
-import dev.chrisbanes.haze.rememberHazeState
 import io.ktor.client.plugins.ClientRequestException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.awaitCancellation
@@ -2028,7 +2028,6 @@ private fun ExpressiveProfileActionButton(
     }
 }
 
-@OptIn(ExperimentalHazeMaterialsApi::class)
 @Composable
 private fun ProfileFloatingBackBar(
     visible: Boolean,
@@ -2039,16 +2038,20 @@ private fun ProfileFloatingBackBar(
 ) {
     if (!visible) return
 
+    val backBarHazeStyle = HazeMaterials.thin()
     Box(modifier = modifier.fillMaxWidth()) {
         Box(
             modifier = Modifier
                 .fillMaxWidth()
                 .height(blurHeight)
-                .hazeEffect(state = hazeState, style = HazeMaterials.thin()) {
-                    progressive = HazeProgressive.verticalGradient(
-                        startIntensity = 1f,
-                        endIntensity = 0f,
-                    )
+                .hazeEffect(state = hazeState) {
+                    blurEffect {
+                        style = backBarHazeStyle
+                        progressive = HazeProgressive.verticalGradient(
+                            startIntensity = 1f,
+                            endIntensity = 0f,
+                        )
+                    }
                 },
         )
         IconButton(

app/shared/src/iosMain/kotlin/ru/fromchat/IosApplicationBootstrap.kt

@@ -7,6 +7,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.launch
 import ru.fromchat.api.ApiClient
+import ru.fromchat.api.local.send.installOutboxForegroundDrain
 import ru.fromchat.api.local.workers.AttachmentTransferBootstrap
 
 object IosApplicationBootstrap {
@@ -16,6 +17,7 @@ object IosApplicationBootstrap {
     fun launchOnApplicationStart() {
         if (started) return
         started = true
+        installOutboxForegroundDrain()
         scope.launch {
             runCatching { ApiClient.loadPersistedData() }
             runCatching { AttachmentTransferBootstrap.runColdStart() }

app/shared/src/iosMain/kotlin/ru/fromchat/KeepWebSocketAlive.ios.kt

@@ -0,0 +1,3 @@
+package ru.fromchat
+
+actual fun keepWebSocketAliveInBackground(): Boolean = false

app/shared/src/iosMain/kotlin/ru/fromchat/api/DeferredStartupNetwork.ios.kt

@@ -1,5 +1,5 @@
 package ru.fromchat.api
 
 actual suspend fun syncPushTokenAfterStartup() {
-    // айфон г@вно поэтому этого не будет потому что не хочу платить кучу денег за App Store
+    // iOS: no APNs / FCM push token sync in this build.
 }

app/shared/src/iosMain/kotlin/ru/fromchat/api/local/cache/FromChatCacheGeneration.ios.kt

@@ -11,7 +11,7 @@ import platform.Foundation.NSFileManager
 import platform.Foundation.NSUserDomainMask
 import platform.Foundation.create
 import platform.Foundation.writeToFile
-import ru.fromchat.api.db.MessageDatabaseProvider
+import ru.fromchat.api.local.db.store.MessageDatabaseProvider
 
 private const val GENERATION_FILE = ".generation"
 

app/shared/src/iosMain/kotlin/ru/fromchat/api/local/download/LocalDecodedImageCache.ios.kt

@@ -1,6 +1,6 @@
 @file:OptIn(ExperimentalForeignApi::class, BetaInteropApi::class)
 
-package ru.fromchat.api.local.cache
+package ru.fromchat.api.local.download
 
 import androidx.compose.ui.graphics.ImageBitmap
 import androidx.compose.ui.graphics.toComposeImageBitmap
@@ -23,8 +23,6 @@ import platform.UIKit.UIGraphicsGetImageFromCurrentImageContext
 import platform.UIKit.UIImage
 import platform.UIKit.UIImageOrientation
 import platform.UIKit.UIImagePNGRepresentation
-import ru.fromchat.api.local.download.decodeImageBytes
-
 actual object PlatformDecodedBitmapCache {
     private val cache = mutableMapOf<String, ImageBitmap>()
 

app/shared/src/iosMain/kotlin/ru/fromchat/api/local/download/LocalImageFileDimensions.ios.kt

@@ -1,5 +1,36 @@
+@file:OptIn(ExperimentalForeignApi::class, BetaInteropApi::class)
+
 package ru.fromchat.api.local.download
 
-internal actual fun readLocalImageDimensions(absolutePath: String): Pair<Int, Int>? = null
+import kotlinx.cinterop.BetaInteropApi
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.addressOf
+import kotlinx.cinterop.useContents
+import kotlinx.cinterop.usePinned
+import platform.Foundation.NSData
+import platform.Foundation.create
+import platform.UIKit.UIImage
 
-internal actual fun readImageDimensionsFromBytes(data: ByteArray): Pair<Int, Int>? = null
+internal actual fun readLocalImageDimensions(absolutePath: String): Pair<Int, Int>? =
+    runCatching {
+        val image = UIImage.imageWithContentsOfFile(absolutePath) ?: return null
+        pixelSize(image)
+    }.getOrNull()
+
+internal actual fun readImageDimensionsFromBytes(data: ByteArray): Pair<Int, Int>? {
+    if (data.isEmpty()) return null
+    return runCatching {
+        val nsData = data.usePinned { pinned ->
+            NSData.create(bytes = pinned.addressOf(0), length = data.size.toULong())
+        } ?: return null
+        val image = UIImage.imageWithData(nsData) ?: return null
+        pixelSize(image)
+    }.getOrNull()
+}
+
+private fun pixelSize(image: UIImage): Pair<Int, Int>? {
+    val w = (image.size.useContents { width } * image.scale).toInt()
+    val h = (image.size.useContents { height } * image.scale).toInt()
+    if (w <= 0 || h <= 0) return null
+    return w to h
+}

app/shared/src/iosMain/kotlin/ru/fromchat/api/local/send/OutboxProcessor.ios.kt

@@ -2,8 +2,29 @@ package ru.fromchat.api.local.send
 
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.launch
+import platform.Foundation.NSNotificationCenter
+import platform.UIKit.UIApplicationDidBecomeActiveNotification
+import ru.fromchat.api.local.cache.CacheContext
 
-/** iOS: drain outbox on enqueue and when the app returns to foreground (parity with WorkManager). */
+private var foregroundDrainInstalled = false
+
+/** Install once: drain outbox when the app becomes active (parity with WorkManager). */
+fun installOutboxForegroundDrain() {
+    if (foregroundDrainInstalled) return
+    foregroundDrainInstalled = true
+    NSNotificationCenter.defaultCenter.addObserverForName(
+        name = UIApplicationDidBecomeActiveNotification,
+        `object` = null,
+        queue = null,
+    ) { _ ->
+        val instanceId = CacheContext.activeInstanceId.value.trim()
+        if (instanceId.isNotEmpty()) {
+            scheduleOutboxProcessing(instanceId)
+        }
+    }
+}
+
+/** iOS: drain outbox on enqueue and when the app returns to foreground. */
 actual fun scheduleOutboxProcessing(instanceId: String) {
     if (instanceId.trim().isEmpty()) return
     MainScope().launch {

app/shared/src/iosMain/kotlin/ru/fromchat/api/local/workers/AttachmentUploadQueue.ios.kt

@@ -1,8 +1,12 @@
 package ru.fromchat.api.local.workers
 
+import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.flow.SharedFlow
-import ru.fromchat.api.local.send.scheduleOutboxProcessing
+import kotlinx.coroutines.launch
 import ru.fromchat.api.local.cache.CacheContext
+import ru.fromchat.api.local.db.store.MessageDatabaseProvider
+import ru.fromchat.api.local.send.OutgoingMessageCoordinator
+import ru.fromchat.api.local.send.scheduleOutboxProcessing
 
 actual object AttachmentUploadQueue {
     actual val progressFlow: SharedFlow<AttachmentUploadProgress> = AttachmentUploadNotifier.progressFlow
@@ -12,6 +16,14 @@ actual object AttachmentUploadQueue {
     }
 
     actual fun cancel(jobId: String) {
-        // Outbox + artifact cleanup handled when user deletes pending message from UI.
+        val instanceId = CacheContext.activeInstanceId.value.trim()
+        if (instanceId.isEmpty()) return
+        MainScope().launch {
+            val row = MessageDatabaseProvider.database.messageDatabaseQueries
+                .selectOutboxItem(instanceId, jobId.trim())
+                .executeAsOneOrNull()
+            val conversationId = row?.conversationId ?: return@launch
+            OutgoingMessageCoordinator.cancelOutboundMessage(jobId, conversationId)
+        }
     }
 }

app/shared/src/iosMain/kotlin/ru/fromchat/logging/GzipCompress.ios.kt

@@ -2,21 +2,28 @@ package ru.fromchat.logging
 
 import kotlinx.cinterop.ExperimentalForeignApi
 import kotlinx.cinterop.UByteVar
+import kotlinx.cinterop.addressOf
 import kotlinx.cinterop.alloc
 import kotlinx.cinterop.allocArray
 import kotlinx.cinterop.convert
 import kotlinx.cinterop.memScoped
 import kotlinx.cinterop.ptr
 import kotlinx.cinterop.reinterpret
-import kotlinx.cinterop.sizeOf
 import kotlinx.cinterop.toCValues
+import kotlinx.cinterop.usePinned
+import kotlinx.cinterop.value
+import platform.posix.memcpy
 import platform.zlib.Z_DEFAULT_COMPRESSION
 import platform.zlib.compress2
+import platform.zlib.uLongVar
 
 @OptIn(ExperimentalForeignApi::class)
 internal actual fun gzipCompress(input: ByteArray): ByteArray {
     if (input.isEmpty()) {
-        return byteArrayOf(0x1f, 0x8b.toByte(), 0x08, 0x00, 0, 0, 0, 0, 0, 0x03, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
+        return byteArrayOf(
+            0x1f, 0x8b.toByte(), 0x08, 0x00, 0, 0, 0, 0, 0, 0x03,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        )
     }
 
     val header = byteArrayOf(
@@ -50,34 +57,42 @@ internal actual fun gzipCompress(input: ByteArray): ByteArray {
 }
 
 @OptIn(ExperimentalForeignApi::class)
-private fun deflateRaw(input: ByteArray): ByteArray = memScoped {
-    if (input.isEmpty()) return@memScoped ByteArray(0)
+private fun deflateRaw(input: ByteArray): ByteArray {
+    if (input.isEmpty()) return ByteArray(0)
 
-    var capacity = (input.size + (input.size / 10) + 12).coerceAtLeast(64)
-    while (true) {
-        val output = allocArray<UByteVar>(capacity)
-        val source = input.toUByteArray().toCValues()
-        val sourceLength = input.size.convert<platform.zlib.uLong>()
-        val destLength = alloc<platform.zlib.uLongVar>()
-        destLength.value = capacity.convert()
+    return memScoped {
+        var capacity = (input.size + (input.size / 10) + 12).coerceAtLeast(64)
+        while (true) {
+            val output = allocArray<UByteVar>(capacity)
+            val source = input.toUByteArray().toCValues()
+            val sourceLength = input.size.convert<platform.zlib.uLong>()
+            val destLength = alloc<uLongVar>()
+            destLength.value = capacity.convert()
 
-        val status = compress2(
-            output,
-            destLength.ptr,
-            source.ptr.reinterpret(),
-            sourceLength,
-            Z_DEFAULT_COMPRESSION,
-        )
+            val status = compress2(
+                output,
+                destLength.ptr,
+                source.ptr.reinterpret(),
+                sourceLength,
+                Z_DEFAULT_COMPRESSION,
+            )
 
-        if (status == 0) {
-            val size = destLength.value.toInt()
-            return@memScoped ByteArray(size) { index -> output[index].toByte() }
-        }
-
-        capacity *= 2
-        if (capacity > input.size * 20) {
-            return@memScoped input
+            if (status == 0) {
+                val size = destLength.value.toInt()
+                val result = ByteArray(size)
+                result.usePinned { pinned ->
+                    memcpy(pinned.addressOf(0), output, size.convert())
+                }
+                return@memScoped result
+            }
+
+            capacity *= 2
+            if (capacity > input.size * 20) {
+                return@memScoped input
+            }
         }
+        @Suppress("UNREACHABLE_CODE")
+        ByteArray(0)
     }
 }
 

app/shared/src/iosMain/kotlin/ru/fromchat/logging/LogFileOps.ios.kt

@@ -6,28 +6,30 @@ import kotlinx.cinterop.addressOf
 import kotlinx.cinterop.alloc
 import kotlinx.cinterop.allocArray
 import kotlinx.cinterop.convert
+import kotlinx.cinterop.get
 import kotlinx.cinterop.memScoped
 import kotlinx.cinterop.ptr
 import kotlinx.cinterop.reinterpret
 import kotlinx.cinterop.toCValues
 import kotlinx.cinterop.usePinned
+import kotlinx.cinterop.value
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import platform.Foundation.NSData
 import platform.Foundation.NSFileManager
-import platform.Foundation.NSString
-import platform.Foundation.NSUTF8StringEncoding
 import platform.Foundation.create
 import platform.Foundation.dataWithContentsOfFile
 import platform.Foundation.writeToFile
 import platform.posix.memcpy
+import platform.zlib.uLongVar
+import platform.zlib.uncompress
 
 @OptIn(ExperimentalForeignApi::class)
 internal actual object LogFileOps {
     actual fun readText(path: String): String {
         if (!NSFileManager.defaultManager.fileExistsAtPath(path)) return ""
-        return NSString.stringWithContentsOfFile(path, encoding = NSUTF8StringEncoding, error = null) as? String
-            ?: ""
+        val raw = NSData.dataWithContentsOfFile(path) ?: return ""
+        return raw.toByteArray().decodeToString()
     }
 
     actual fun readBytes(path: String): ByteArray {
@@ -36,53 +38,60 @@ internal actual object LogFileOps {
         return raw.toByteArray()
     }
 
-    actual suspend fun gzipFile(sourcePath: String, destinationPath: String) = withContext(Dispatchers.Default) {
-        if (!NSFileManager.defaultManager.fileExistsAtPath(sourcePath)) return@withContext
-        val raw = NSData.dataWithContentsOfFile(sourcePath) ?: return@withContext
-        val bytes = raw.toByteArray()
-        val gzipped = gzipCompress(bytes)
-        val parent = destinationPath.substringBeforeLast('/', missingDelimiterValue = destinationPath)
-        NSFileManager.defaultManager.createDirectoryAtPath(parent, true, null, null)
-        NSData.create(bytes = gzipped, length = gzipped.size.toULong())
-            .writeToFile(destinationPath, true)
-        NSFileManager.defaultManager.removeItemAtPath(sourcePath, null)
+    actual suspend fun gzipFile(sourcePath: String, destinationPath: String) {
+        withContext(Dispatchers.Default) {
+            if (!NSFileManager.defaultManager.fileExistsAtPath(sourcePath)) return@withContext
+            val raw = NSData.dataWithContentsOfFile(sourcePath) ?: return@withContext
+            val gzipped = gzipCompress(raw.toByteArray())
+            val parent = destinationPath.substringBeforeLast('/', missingDelimiterValue = destinationPath)
+            NSFileManager.defaultManager.createDirectoryAtPath(parent, true, null, null)
+            writeBytes(destinationPath, gzipped)
+            NSFileManager.defaultManager.removeItemAtPath(sourcePath, null)
+        }
     }
 
     actual suspend fun readGzipText(path: String, onProgress: (Float) -> Unit): String =
         withContext(Dispatchers.Default) {
-            val bytes = gunzipToByteArray(path, onProgress)
-            bytes.decodeToString()
+            gunzipToByteArray(path, onProgress).decodeToString()
         }
 
     actual suspend fun gunzipToFile(
         sourcePath: String,
         destinationPath: String,
         onProgress: (Float) -> Unit,
-    ) = withContext(Dispatchers.Default) {
-        val bytes = gunzipToByteArray(sourcePath, onProgress)
-        val parent = destinationPath.substringBeforeLast('/', missingDelimiterValue = destinationPath)
-        NSFileManager.defaultManager.createDirectoryAtPath(parent, true, null, null)
-        NSData.create(bytes = bytes, length = bytes.size.toULong())
-            .writeToFile(destinationPath, true)
+    ) {
+        withContext(Dispatchers.Default) {
+            val bytes = gunzipToByteArray(sourcePath, onProgress)
+            val parent = destinationPath.substringBeforeLast('/', missingDelimiterValue = destinationPath)
+            NSFileManager.defaultManager.createDirectoryAtPath(parent, true, null, null)
+            writeBytes(destinationPath, bytes)
+        }
     }
 
     actual suspend fun zipFiles(
         entries: List<Pair<String, String>>,
         destinationPath: String,
-    ) = withContext(Dispatchers.Default) {
-        if (entries.isEmpty()) return@withContext
-        val zipEntries = entries.mapNotNull { (entryName, sourcePath) ->
-            if (!NSFileManager.defaultManager.fileExistsAtPath(sourcePath)) return@mapNotNull null
-            ZipFileEntry(entryName, readBytes(sourcePath))
+    ) {
+        withContext(Dispatchers.Default) {
+            if (entries.isEmpty()) return@withContext
+            val zipEntries = entries.mapNotNull { (entryName, sourcePath) ->
+                if (!NSFileManager.defaultManager.fileExistsAtPath(sourcePath)) return@mapNotNull null
+                ZipFileEntry(entryName, readBytes(sourcePath))
+            }
+            val bytes = buildStoreZipArchive(zipEntries)
+            val parent = destinationPath.substringBeforeLast('/', missingDelimiterValue = destinationPath)
+            NSFileManager.defaultManager.createDirectoryAtPath(parent, true, null, null)
+            writeBytes(destinationPath, bytes)
+        }
+    }
+
+    private fun writeBytes(path: String, bytes: ByteArray) {
+        bytes.usePinned { pinned ->
+            NSData.create(bytes = pinned.addressOf(0), length = bytes.size.toULong())
+                ?.writeToFile(path, true)
         }
-        val bytes = buildStoreZipArchive(zipEntries)
-        val parent = destinationPath.substringBeforeLast('/', missingDelimiterValue = destinationPath)
-        NSFileManager.defaultManager.createDirectoryAtPath(parent, true, null, null)
-        NSData.create(bytes = bytes, length = bytes.size.toULong())
-            .writeToFile(destinationPath, true)
     }
 
-    @OptIn(ExperimentalForeignApi::class)
     private fun gunzipToByteArray(path: String, onProgress: (Float) -> Unit): ByteArray {
         if (!NSFileManager.defaultManager.fileExistsAtPath(path)) {
             onProgress(1f)
@@ -103,17 +112,16 @@ internal actual object LogFileOps {
         return inflated
     }
 
-    @OptIn(ExperimentalForeignApi::class)
     private fun inflateGzipPayload(deflated: ByteArray): ByteArray = memScoped {
         if (deflated.isEmpty()) return@memScoped ByteArray(0)
 
         var capacity = (deflated.size * 4).coerceAtLeast(256)
         while (capacity <= deflated.size * 32) {
             val output = allocArray<UByteVar>(capacity)
-            val destLength = alloc<platform.zlib.uLongVar>()
-            destLength.value = capacity.convert<platform.zlib.uLong>()
+            val destLength = alloc<uLongVar>()
+            destLength.value = capacity.convert()
             val source = deflated.toUByteArray().toCValues()
-            val status = platform.zlib.uncompress(
+            val status = uncompress(
                 output,
                 destLength.ptr,
                 source.ptr.reinterpret(),
@@ -121,14 +129,17 @@ internal actual object LogFileOps {
             )
             if (status == 0) {
                 val size = destLength.value.toInt()
-                return@memScoped ByteArray(size) { index -> output[index].toByte() }
+                val result = ByteArray(size)
+                result.usePinned { pinned ->
+                    memcpy(pinned.addressOf(0), output, size.convert())
+                }
+                return@memScoped result
             }
             capacity *= 2
         }
         ByteArray(0)
     }
 
-    @OptIn(ExperimentalForeignApi::class)
     private fun NSData.toByteArray(): ByteArray {
         val length = this.length.toInt()
         if (length == 0) return ByteArray(0)

app/shared/src/iosMain/kotlin/ru/fromchat/ui/auth/captcha/SmartCaptchaWebView.ios.kt

@@ -1,10 +1,67 @@
+@file:OptIn(ExperimentalForeignApi::class)
+
 package ru.fromchat.ui.auth.captcha
 
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.viewinterop.UIKitView
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.ObjCSignatureOverride
+import platform.CoreGraphics.CGRectMake
+import platform.Foundation.NSError
+import platform.Foundation.NSURL
+import platform.Foundation.NSURLRequest
+import platform.UIKit.UIColor
+import platform.WebKit.WKNavigation
+import platform.WebKit.WKNavigationAction
+import platform.WebKit.WKNavigationActionPolicy
+import platform.WebKit.WKNavigationDelegateProtocol
+import platform.WebKit.WKScriptMessage
+import platform.WebKit.WKScriptMessageHandlerProtocol
+import platform.WebKit.WKUserContentController
+import platform.WebKit.WKUserScript
+import platform.WebKit.WKUserScriptInjectionTime
+import platform.WebKit.WKWebView
+import platform.WebKit.WKWebViewConfiguration
+import platform.darwin.NSObject
 import ru.fromchat.Logger
 
+private const val SMARTCAPTCHA_WEBVIEW_BASE = "https://smartcaptcha.cloud.yandex.ru/webview"
+private const val NATIVE_CLIENT_HANDLER = "NativeClient"
+
+/**
+ * Injected at document start so [window.NativeClient] matches Android's JavascriptInterface
+ * before SmartCaptcha scripts run (including iframes).
+ */
+private const val NATIVE_CLIENT_BRIDGE_JS = """
+(function() {
+  if (window.NativeClient && window.NativeClient.__fromchat) return;
+  function post(payload) {
+    try {
+      window.webkit.messageHandlers.NativeClient.postMessage(payload);
+    } catch (e) {}
+  }
+  window.NativeClient = {
+    __fromchat: true,
+    onGetToken: function(token) {
+      post({ method: 'onGetToken', token: String(token == null ? '' : token) });
+    },
+    onChallengeVisible: function() {
+      post({ method: 'onChallengeVisible' });
+    },
+    onChallengeHidden: function() {
+      post({ method: 'onChallengeHidden' });
+    }
+  };
+})();
+"""
+
 @Composable
 actual fun SmartCaptchaWebView(
     sitekey: String,
@@ -16,12 +73,186 @@ actual fun SmartCaptchaWebView(
     onChallengeHidden: () -> Unit,
     onError: (String) -> Unit,
 ) {
-    LaunchedEffect(sitekey) {
-        Logger.w(
-            SmartCaptchaLog.TAG,
-            "iOS stub: captcha unavailable sitekey=${SmartCaptchaLog.redactKey(sitekey)} " +
-                "languageTag=$languageTag",
-        )
-        onError("Captcha is not available on this platform yet.")
+    val onTokenState = rememberUpdatedState(onToken)
+    val onReadyState = rememberUpdatedState(onReady)
+    val onChallengeVisibleState = rememberUpdatedState(onChallengeVisible)
+    val onChallengeHiddenState = rememberUpdatedState(onChallengeHidden)
+    val onErrorState = rememberUpdatedState(onError)
+    val background = MaterialTheme.colorScheme.surfaceContainer
+    val lang = languageTag.substringBefore('-').lowercase().ifBlank { "en" }
+    val captchaUrl = remember(sitekey, lang) {
+        "$SMARTCAPTCHA_WEBVIEW_BASE?sitekey=${sitekey.trim()}&hl=$lang"
     }
+    val instanceId = remember { (100000..999999).random().toString(16) }
+    val heldWebView = remember { arrayOfNulls<WKWebView>(1) }
+
+    val messageHandler = remember {
+        object : NSObject(), WKScriptMessageHandlerProtocol {
+            override fun userContentController(
+                userContentController: WKUserContentController,
+                didReceiveScriptMessage: WKScriptMessage,
+            ) {
+                if (didReceiveScriptMessage.name != NATIVE_CLIENT_HANDLER) return
+                val body = didReceiveScriptMessage.body
+                val map = body as? Map<*, *>
+                val method = map?.get("method") as? String ?: return
+                when (method) {
+                    "onGetToken" -> {
+                        val cleaned = (map["token"] as? String).orEmpty().trim()
+                        Logger.i(
+                            SmartCaptchaLog.TAG,
+                            "JS onGetToken id=$instanceId ${SmartCaptchaLog.redactToken(cleaned)}",
+                        )
+                        if (cleaned.isNotEmpty()) {
+                            onTokenState.value(cleaned)
+                        } else {
+                            Logger.w(SmartCaptchaLog.TAG, "JS onGetToken empty id=$instanceId")
+                            onErrorState.value("")
+                        }
+                    }
+                    "onChallengeVisible" -> {
+                        Logger.i(SmartCaptchaLog.TAG, "JS onChallengeVisible id=$instanceId")
+                        onChallengeVisibleState.value()
+                    }
+                    "onChallengeHidden" -> {
+                        Logger.i(SmartCaptchaLog.TAG, "JS onChallengeHidden id=$instanceId")
+                        onChallengeHiddenState.value()
+                    }
+                }
+            }
+        }
+    }
+
+    val navDelegate = remember {
+        object : NSObject(), WKNavigationDelegateProtocol {
+            override fun webView(
+                webView: WKWebView,
+                decidePolicyForNavigationAction: WKNavigationAction,
+                decisionHandler: (WKNavigationActionPolicy) -> Unit,
+            ) {
+                val url = decidePolicyForNavigationAction.request.URL?.absoluteString
+                val host = decidePolicyForNavigationAction.request.URL?.host?.lowercase().orEmpty()
+                val block = host.isNotEmpty() &&
+                    !host.endsWith("yandex.ru") &&
+                    !host.endsWith("yandex.com") &&
+                    !host.endsWith("yandex.net")
+                Logger.d(
+                    SmartCaptchaLog.TAG,
+                    "decidePolicy id=$instanceId block=$block host=$host " +
+                        "url=${SmartCaptchaLog.shortUrl(url)}",
+                )
+                decisionHandler(
+                    if (block) {
+                        WKNavigationActionPolicy.WKNavigationActionPolicyCancel
+                    } else {
+                        WKNavigationActionPolicy.WKNavigationActionPolicyAllow
+                    },
+                )
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(webView: WKWebView, didFinishNavigation: WKNavigation?) {
+                Logger.i(
+                    SmartCaptchaLog.TAG,
+                    "didFinishNavigation id=$instanceId " +
+                        "url=${SmartCaptchaLog.shortUrl(webView.URL?.absoluteString)}",
+                )
+                onReadyState.value()
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(
+                webView: WKWebView,
+                didFailNavigation: WKNavigation?,
+                withError: NSError,
+            ) {
+                Logger.w(
+                    SmartCaptchaLog.TAG,
+                    "didFailNavigation id=$instanceId desc=${withError.localizedDescription}",
+                )
+                onErrorState.value(withError.localizedDescription)
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(
+                webView: WKWebView,
+                didFailProvisionalNavigation: WKNavigation?,
+                withError: NSError,
+            ) {
+                Logger.w(
+                    SmartCaptchaLog.TAG,
+                    "didFailProvisionalNavigation id=$instanceId " +
+                        "desc=${withError.localizedDescription}",
+                )
+                onErrorState.value(withError.localizedDescription)
+            }
+        }
+    }
+
+    DisposableEffect(instanceId) {
+        Logger.i(
+            SmartCaptchaLog.TAG,
+            "WebView compose enter id=$instanceId sitekey=${SmartCaptchaLog.redactKey(sitekey)} " +
+                "lang=$lang languageTag=$languageTag url=${SmartCaptchaLog.shortUrl(captchaUrl)}",
+        )
+        onDispose {
+            Logger.i(SmartCaptchaLog.TAG, "WebView compose dispose id=$instanceId")
+            heldWebView[0]?.let { wv ->
+                wv.configuration.userContentController
+                    .removeScriptMessageHandlerForName(NATIVE_CLIENT_HANDLER)
+                wv.setNavigationDelegate(null)
+                wv.stopLoading()
+            }
+            heldWebView[0] = null
+        }
+    }
+
+    UIKitView(
+        factory = {
+            Logger.i(SmartCaptchaLog.TAG, "UIKitView.factory id=$instanceId")
+            val contentController = WKUserContentController().apply {
+                addScriptMessageHandler(messageHandler, name = NATIVE_CLIENT_HANDLER)
+                addUserScript(
+                    WKUserScript(
+                        source = NATIVE_CLIENT_BRIDGE_JS,
+                        injectionTime = WKUserScriptInjectionTime.WKUserScriptInjectionTimeAtDocumentStart,
+                        forMainFrameOnly = false,
+                    ),
+                )
+            }
+            val config = WKWebViewConfiguration().apply {
+                setUserContentController(contentController)
+                allowsInlineMediaPlayback = true
+            }
+            WKWebView(
+                frame = CGRectMake(0.0, 0.0, 0.0, 0.0),
+                configuration = config,
+            ).apply {
+                opaque = true
+                backgroundColor = background.toUIColor()
+                scrollView.backgroundColor = background.toUIColor()
+                setNavigationDelegate(navDelegate)
+                Logger.i(
+                    SmartCaptchaLog.TAG,
+                    "loadUrl id=$instanceId url=${SmartCaptchaLog.shortUrl(captchaUrl)}",
+                )
+                loadRequest(NSURLRequest(uRL = NSURL(string = captchaUrl)))
+                heldWebView[0] = this
+            }
+        },
+        modifier = modifier.fillMaxSize(),
+        update = { wv ->
+            wv.backgroundColor = background.toUIColor()
+            wv.scrollView.backgroundColor = background.toUIColor()
+            heldWebView[0] = wv
+        },
+    )
 }
+
+private fun Color.toUIColor(): UIColor =
+    UIColor(
+        red = red.toDouble(),
+        green = green.toDouble(),
+        blue = blue.toDouble(),
+        alpha = alpha.toDouble(),
+    )

app/shared/src/iosMain/kotlin/ru/fromchat/ui/auth/yandex/YandexOAuthWebView.ios.kt

@@ -1,9 +1,108 @@
+@file:OptIn(ExperimentalForeignApi::class)
+
 package ru.fromchat.ui.auth.yandex
 
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.core.tween
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
+import androidx.compose.material3.LoadingIndicator
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberUpdatedState
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.viewinterop.UIKitView
+import kotlinx.coroutines.delay
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.ObjCSignatureOverride
+import platform.CoreGraphics.CGRectMake
+import platform.Foundation.NSHTTPCookie
+import platform.Foundation.NSHTTPCookieStorage
+import platform.Foundation.NSURL
+import platform.Foundation.NSURLRequest
+import platform.UIKit.UIApplication
+import platform.UIKit.UIColor
+import platform.WebKit.WKNavigation
+import platform.WebKit.WKNavigationAction
+import platform.WebKit.WKNavigationActionPolicy
+import platform.WebKit.WKNavigationDelegateProtocol
+import platform.WebKit.WKUserScript
+import platform.WebKit.WKUserScriptInjectionTime
+import platform.WebKit.WKWebView
+import platform.WebKit.WKWebViewConfiguration
+import platform.darwin.NSObject
+import ru.fromchat.Logger
+import ru.fromchat.auth.yandex.YANDEX_OAUTH_REDIRECT_URI
+import ru.fromchat.auth.yandex.extractOAuthCode
 
+private const val LOG_TAG = "YandexOAuthWV"
+private const val LOADING_FADE_MS = 250
+private const val LOADING_HIDE_DELAY_MS = 500L
+
+private fun shortUrl(url: String?): String {
+    if (url.isNullOrBlank()) return "null"
+    return if (url.length <= 120) url else url.take(117) + "..."
+}
+
+private const val FORCE_COLOR_SCHEME_JS = """
+(function(scheme) {
+  try {
+    var meta = document.querySelector('meta[name="color-scheme"]');
+    if (!meta) {
+      meta = document.createElement('meta');
+      meta.name = 'color-scheme';
+      (document.head || document.documentElement).appendChild(meta);
+    }
+    meta.content = scheme;
+    document.documentElement.style.colorScheme = scheme;
+    document.documentElement.setAttribute('data-theme', scheme);
+    document.documentElement.classList.toggle('theme_dark', scheme === 'dark');
+    document.documentElement.classList.toggle('Theme_color_dark', scheme === 'dark');
+    document.documentElement.classList.toggle('theme_light', scheme === 'light');
+    try { localStorage.setItem('color-scheme', scheme); } catch (e) {}
+    try { localStorage.setItem('theme', scheme); } catch (e) {}
+  } catch (e) {}
+})
+"""
+
+private const val DISABLE_USER_SELECT_JS = """
+(function() {
+  try {
+    var id = 'fromchat-no-select';
+    if (document.getElementById(id)) return;
+    var s = document.createElement('style');
+    s.id = id;
+    s.textContent = [
+      '*,*::before,*::after{',
+      '-webkit-user-select:none!important;',
+      'user-select:none!important;',
+      '-webkit-touch-callout:none!important;',
+      '}',
+      'input,textarea,select,[contenteditable],[contenteditable="true"],',
+      'input *,textarea *,[contenteditable] *,[contenteditable="true"] *{',
+      '-webkit-user-select:text!important;',
+      'user-select:text!important;',
+      '-webkit-touch-callout:default!important;',
+      '}'
+    ].join('');
+    (document.head || document.documentElement).appendChild(s);
+  } catch (e) {}
+})();
+"""
+
+@OptIn(ExperimentalMaterial3Api::class, ExperimentalMaterial3ExpressiveApi::class)
 @Composable
 actual fun YandexOAuthWebView(
     authorizeUrl: String,
@@ -17,7 +116,287 @@ actual fun YandexOAuthWebView(
     onError: (String) -> Unit,
     onCancel: () -> Unit,
 ) {
-    LaunchedEffect(authorizeUrl) {
-        onError("Yandex sign-in is not available on this platform yet.")
+    var canGoBack by remember { mutableStateOf(false) }
+    var pageLoading by remember { mutableStateOf(true) }
+    var showLoadingOverlay by remember { mutableStateOf(true) }
+    val lang = languageTag.substringBefore('-').lowercase().ifBlank { "en" }
+    val scheme = if (darkTheme) "dark" else "light"
+    val onHistoryBackAvailabilityChangedState = rememberUpdatedState(onHistoryBackAvailabilityChanged)
+    val onPageBackgroundColorState = rememberUpdatedState(onPageBackgroundColor)
+    val onCodeState = rememberUpdatedState(onCode)
+    val onErrorState = rememberUpdatedState(onError)
+    val instanceId = remember { (100000..999999).random().toString(16) }
+    val heldWebView = remember { arrayOfNulls<WKWebView>(1) }
+
+    fun updateCanGoBack(value: Boolean) {
+        if (canGoBack != value) {
+            Logger.d(LOG_TAG, "canGoBack $canGoBack → $value id=$instanceId")
+            canGoBack = value
+            onHistoryBackAvailabilityChangedState.value(value)
+        }
+    }
+
+    DisposableEffect(instanceId) {
+        Logger.i(
+            LOG_TAG,
+            "compose enter id=$instanceId darkTheme=$darkTheme lang=$lang " +
+                "authorizeUrl=${shortUrl(authorizeUrl)}",
+        )
+        onPageBackgroundColorState.value(fallbackColor)
+        onDispose {
+            Logger.i(LOG_TAG, "compose dispose id=$instanceId")
+            heldWebView[0]?.let { wv ->
+                wv.setNavigationDelegate(null)
+                wv.stopLoading()
+            }
+            heldWebView[0] = null
+        }
+    }
+
+    LaunchedEffect(pageLoading) {
+        if (pageLoading) {
+            showLoadingOverlay = true
+        } else {
+            delay(LOADING_HIDE_DELAY_MS)
+            showLoadingOverlay = false
+        }
+    }
+
+    val navDelegate = remember(authorizeUrl, lang, darkTheme) {
+        object : NSObject(), WKNavigationDelegateProtocol {
+            private fun handleSpecialUrl(url: String?): Boolean {
+                if (url.isNullOrBlank()) return false
+                if (url.startsWith("fromchat://", ignoreCase = true)) {
+                    Logger.i(LOG_TAG, "intercept redirect url=${shortUrl(url)} id=$instanceId")
+                    val code = extractOAuthCode(url)
+                    if (code != null) {
+                        onCodeState.value(code)
+                    } else {
+                        onErrorState.value("")
+                    }
+                    return true
+                }
+                if (!isYandexAuthNavigationIos(url)) {
+                    Logger.d(LOG_TAG, "external nav url=${shortUrl(url)} id=$instanceId")
+                    openExternalUrl(url)
+                    return true
+                }
+                return false
+            }
+
+            private fun applyPageChrome(webView: WKWebView) {
+                webView.evaluateJavaScript("$FORCE_COLOR_SCHEME_JS('$scheme');", completionHandler = null)
+                webView.evaluateJavaScript(DISABLE_USER_SELECT_JS, completionHandler = null)
+            }
+
+            override fun webView(
+                webView: WKWebView,
+                decidePolicyForNavigationAction: WKNavigationAction,
+                decisionHandler: (WKNavigationActionPolicy) -> Unit,
+            ) {
+                val url = decidePolicyForNavigationAction.request.URL?.absoluteString
+                if (handleSpecialUrl(url)) {
+                    decisionHandler(WKNavigationActionPolicy.WKNavigationActionPolicyCancel)
+                } else {
+                    decisionHandler(WKNavigationActionPolicy.WKNavigationActionPolicyAllow)
+                }
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(webView: WKWebView, didCommitNavigation: WKNavigation?) {
+                val url = webView.URL?.absoluteString
+                Logger.i(LOG_TAG, "didCommitNavigation id=$instanceId url=${shortUrl(url)}")
+                if (url != null && url.startsWith(YANDEX_OAUTH_REDIRECT_URI, ignoreCase = true)) {
+                    handleSpecialUrl(url)
+                }
+                pageLoading = true
+                applyPageChrome(webView)
+                updateCanGoBack(webView.canGoBack)
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(webView: WKWebView, didFinishNavigation: WKNavigation?) {
+                Logger.i(
+                    LOG_TAG,
+                    "didFinishNavigation id=$instanceId url=${shortUrl(webView.URL?.absoluteString)} " +
+                        "canGoBack=${webView.canGoBack}",
+                )
+                pageLoading = false
+                applyPageChrome(webView)
+                updateCanGoBack(webView.canGoBack)
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(
+                webView: WKWebView,
+                didFailNavigation: WKNavigation?,
+                withError: platform.Foundation.NSError,
+            ) {
+                Logger.w(
+                    LOG_TAG,
+                    "didFailNavigation id=$instanceId desc=${withError.localizedDescription}",
+                )
+                pageLoading = false
+                updateCanGoBack(webView.canGoBack)
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(
+                webView: WKWebView,
+                didFailProvisionalNavigation: WKNavigation?,
+                withError: platform.Foundation.NSError,
+            ) {
+                Logger.w(
+                    LOG_TAG,
+                    "didFailProvisionalNavigation id=$instanceId " +
+                        "desc=${withError.localizedDescription}",
+                )
+                pageLoading = false
+                updateCanGoBack(webView.canGoBack)
+            }
+        }
+    }
+
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(fallbackColor),
+    ) {
+        UIKitView(
+            factory = {
+                Logger.i(
+                    LOG_TAG,
+                    "UIKitView.factory START id=$instanceId darkTheme=$darkTheme " +
+                        "clearCookies=$clearCookies",
+                )
+                if (clearCookies) {
+                    clearYandexWebViewCookiesIos()
+                }
+                seedYandexThemeCookiesIos(darkTheme)
+                val config = WKWebViewConfiguration().apply {
+                    allowsInlineMediaPlayback = true
+                    userContentController.addUserScript(
+                        WKUserScript(
+                            source = "$FORCE_COLOR_SCHEME_JS('$scheme');$DISABLE_USER_SELECT_JS",
+                            injectionTime =
+                                WKUserScriptInjectionTime.WKUserScriptInjectionTimeAtDocumentStart,
+                            forMainFrameOnly = true,
+                        ),
+                    )
+                }
+                WKWebView(
+                    frame = CGRectMake(0.0, 0.0, 0.0, 0.0),
+                    configuration = config,
+                ).apply {
+                    opaque = true
+                    backgroundColor = fallbackColor.toUIColor()
+                    scrollView.backgroundColor = fallbackColor.toUIColor()
+                    setNavigationDelegate(navDelegate)
+                    Logger.w(
+                        LOG_TAG,
+                        "UIKitView.factory loadUrl id=$instanceId url=${shortUrl(authorizeUrl)}",
+                    )
+                    loadRequest(NSURLRequest(uRL = NSURL(string = authorizeUrl)))
+                    heldWebView[0] = this
+                }
+            },
+            modifier = Modifier.fillMaxSize(),
+            update = { wv ->
+                heldWebView[0] = wv
+                updateCanGoBack(wv.canGoBack)
+            },
+        )
+
+        AnimatedVisibility(
+            visible = showLoadingOverlay,
+            enter = fadeIn(tween(0)),
+            exit = fadeOut(tween(LOADING_FADE_MS)),
+        ) {
+            Box(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .background(fallbackColor),
+                contentAlignment = Alignment.Center,
+            ) {
+                LoadingIndicator()
+            }
+        }
     }
 }
+
+/**
+ * Keep Yandex ID / OAuth / captcha flows in the WebView; open everything else externally.
+ * iOS copy of Android [isYandexAuthNavigation] (androidMain-only there).
+ */
+private fun isYandexAuthNavigationIos(url: String): Boolean {
+    if (url.startsWith("fromchat://", ignoreCase = true)) return true
+    val nsUrl = NSURL.URLWithString(url) ?: return false
+    val host = nsUrl.host?.lowercase() ?: return false
+    val path = nsUrl.path.orEmpty().lowercase()
+
+    if (host == "yandex.ru" || host == "www.yandex.ru" || host == "ya.ru" || host == "www.ya.ru") {
+        return path.contains("captcha") ||
+            path.startsWith("/auth") ||
+            path.startsWith("/showcaptcha") ||
+            path.startsWith("/checkcaptcha")
+    }
+
+    return host == "oauth.yandex.com" ||
+        host == "oauth.yandex.ru" ||
+        host.endsWith(".oauth.yandex.com") ||
+        host.endsWith(".oauth.yandex.ru") ||
+        host == "passport.yandex.ru" ||
+        host == "passport.yandex.com" ||
+        host.endsWith(".passport.yandex.ru") ||
+        host.endsWith(".passport.yandex.com") ||
+        host.startsWith("auth.yandex.") ||
+        host.startsWith("login.yandex.") ||
+        host.startsWith("id.yandex.") ||
+        host == "sso.passport.yandex.ru" ||
+        host == "captcha.yandex.net" ||
+        host.endsWith(".captcha.yandex.net") ||
+        (host.contains("captcha") && host.contains("yandex"))
+}
+
+private fun openExternalUrl(url: String) {
+    val nsUrl = NSURL.URLWithString(url) ?: return
+    runCatching { UIApplication.sharedApplication.openURL(nsUrl) }
+}
+
+private fun clearYandexWebViewCookiesIos() {
+    val storage = NSHTTPCookieStorage.sharedHTTPCookieStorage
+    storage.cookies?.filterIsInstance<NSHTTPCookie>()?.forEach { storage.deleteCookie(it) }
+    Logger.i(LOG_TAG, "cleared WebView cookies for Yandex re-auth")
+}
+
+private fun seedYandexThemeCookiesIos(darkTheme: Boolean) {
+    val theme = if (darkTheme) "dark" else "light"
+    val storage = NSHTTPCookieStorage.sharedHTTPCookieStorage
+    val hosts = listOf(
+        "yandex.ru",
+        "yandex.com",
+        "passport.yandex.ru",
+        "passport.yandex.com",
+        "oauth.yandex.ru",
+        "oauth.yandex.com",
+    )
+    for (domain in hosts) {
+        for (nameValue in listOf("color_scheme=$theme", "theme=$theme", "yh=Theme=$theme")) {
+            val props: Map<Any?, *> = mapOf(
+                "Name" to nameValue.substringBefore('='),
+                "Value" to nameValue.substringAfter('='),
+                "Domain" to domain,
+                "Path" to "/",
+            )
+            NSHTTPCookie.cookieWithProperties(props)?.let { storage.setCookie(it) }
+        }
+    }
+}
+
+private fun Color.toUIColor(): UIColor =
+    UIColor(
+        red = red.toDouble(),
+        green = green.toDouble(),
+        blue = blue.toDouble(),
+        alpha = alpha.toDouble(),
+    )

app/shared/src/iosMain/kotlin/ru/fromchat/ui/calls/CallMediaLayer.ios.kt

@@ -1,11 +1,43 @@
+@file:OptIn(ExperimentalForeignApi::class)
+
 package ru.fromchat.ui.calls
 
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.key
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberUpdatedState
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.viewinterop.UIKitView
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.ObjCSignatureOverride
+import platform.Foundation.NSError
+import platform.WebKit.WKNavigation
+import platform.WebKit.WKNavigationDelegateProtocol
+import platform.WebKit.WKScriptMessage
+import platform.WebKit.WKScriptMessageHandlerProtocol
+import platform.WebKit.WKUserContentController
+import platform.WebKit.WKWebView
+import platform.WebKit.WKWebViewConfiguration
+import platform.WebKit.WKAudiovisualMediaTypeNone
+import platform.CoreGraphics.CGRectMake
+import platform.darwin.NSObject
+import ru.fromchat.Logger
+import ru.fromchat.api.calls.CallStore
 import ru.fromchat.api.calls.LiveKitConnectSession
 
+private const val TAG = "CallMediaLayer"
+private const val HANDLER_NAME = "FromChatCall"
+
 @Composable
 actual fun CallMediaLayer(
     connect: LiveKitConnectSession?,
@@ -13,5 +45,182 @@ actual fun CallMediaLayer(
     showInCallControls: Boolean,
     modifier: Modifier,
 ) {
-    Box(modifier = modifier.fillMaxSize())
+    when {
+        connect == null && showDialingPlaceholder -> {
+            Box(
+                modifier = modifier
+                    .fillMaxSize()
+                    .background(MaterialTheme.colorScheme.surfaceContainerHighest),
+                contentAlignment = Alignment.Center,
+            ) {
+                CircularProgressIndicator(color = MaterialTheme.colorScheme.primary)
+            }
+        }
+        connect != null -> {
+            key(connect.roomName) {
+                LiveKitWkWebCall(
+                    session = connect,
+                    showInCallControls = showInCallControls,
+                    modifier = modifier,
+                )
+            }
+        }
+        else -> Box(modifier = modifier.fillMaxSize())
+    }
+}
+
+@Composable
+private fun LiveKitWkWebCall(
+    session: LiveKitConnectSession,
+    showInCallControls: Boolean,
+    modifier: Modifier,
+) {
+    var micOn by remember(session.roomName) { mutableStateOf(true) }
+    var camOn by remember(session.roomName) { mutableStateOf(true) }
+    val sessionState = rememberUpdatedState(session)
+    val heldWebView = remember { arrayOfNulls<WKWebView>(1) }
+    val instanceId = remember { (100000..999999).random().toString(16) }
+
+    val messageHandler = remember {
+        object : NSObject(), WKScriptMessageHandlerProtocol {
+            override fun userContentController(
+                userContentController: WKUserContentController,
+                didReceiveScriptMessage: WKScriptMessage,
+            ) {
+                if (didReceiveScriptMessage.name != HANDLER_NAME) return
+                val map = didReceiveScriptMessage.body as? Map<*, *> ?: return
+                when (map["method"] as? String) {
+                    "onConnected" -> {
+                        Logger.i(TAG, "LiveKit JS connected id=$instanceId room=${sessionState.value.roomName}")
+                    }
+                    "onConnectFailed" -> {
+                        val message = (map["message"] as? String).orEmpty()
+                        Logger.e(TAG, "LiveKit JS connect failed id=$instanceId: $message")
+                        CallStore.onLiveKitConnectFailed(sessionState.value, message)
+                    }
+                }
+            }
+        }
+    }
+
+    val navDelegate = remember {
+        object : NSObject(), WKNavigationDelegateProtocol {
+            @ObjCSignatureOverride
+            override fun webView(webView: WKWebView, didFinishNavigation: WKNavigation?) {
+                Logger.i(TAG, "didFinishNavigation id=$instanceId → connect")
+                webView.evaluateJavaScript(
+                    LiveKitCallWebPage.connectScript(
+                        sessionState.value.serverUrl,
+                        sessionState.value.token,
+                    ),
+                    completionHandler = { _, error ->
+                        if (error != null) {
+                            Logger.e(
+                                TAG,
+                                "connect script failed id=$instanceId: ${error.localizedDescription}",
+                            )
+                            CallStore.onLiveKitConnectFailed(
+                                sessionState.value,
+                                error.localizedDescription,
+                            )
+                        }
+                    },
+                )
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(
+                webView: WKWebView,
+                didFailNavigation: WKNavigation?,
+                withError: NSError,
+            ) {
+                Logger.w(TAG, "didFailNavigation id=$instanceId: ${withError.localizedDescription}")
+                CallStore.onLiveKitConnectFailed(sessionState.value, withError.localizedDescription)
+            }
+
+            @ObjCSignatureOverride
+            override fun webView(
+                webView: WKWebView,
+                didFailProvisionalNavigation: WKNavigation?,
+                withError: NSError,
+            ) {
+                Logger.w(
+                    TAG,
+                    "didFailProvisionalNavigation id=$instanceId: ${withError.localizedDescription}",
+                )
+                CallStore.onLiveKitConnectFailed(sessionState.value, withError.localizedDescription)
+            }
+        }
+    }
+
+    DisposableEffect(session.roomName) {
+        Logger.i(TAG, "WKWebView call enter id=$instanceId room=${session.roomName}")
+        onDispose {
+            Logger.i(TAG, "WKWebView call dispose id=$instanceId")
+            heldWebView[0]?.let { wv ->
+                wv.evaluateJavaScript(LiveKitCallWebPage.disconnectScript(), null)
+                wv.configuration.userContentController
+                    .removeScriptMessageHandlerForName(HANDLER_NAME)
+                wv.setNavigationDelegate(null)
+                wv.stopLoading()
+            }
+            heldWebView[0] = null
+        }
+    }
+
+    Box(modifier = modifier.fillMaxSize()) {
+        UIKitView(
+            factory = {
+                val contentController = WKUserContentController().apply {
+                    addScriptMessageHandler(messageHandler, name = HANDLER_NAME)
+                }
+                val config = WKWebViewConfiguration().apply {
+                    setUserContentController(contentController)
+                    allowsInlineMediaPlayback = true
+                    mediaTypesRequiringUserActionForPlayback = WKAudiovisualMediaTypeNone
+                }
+                WKWebView(
+                    frame = CGRectMake(0.0, 0.0, 0.0, 0.0),
+                    configuration = config,
+                ).apply {
+                    opaque = true
+                    setNavigationDelegate(navDelegate)
+                    loadHTMLString(
+                        LiveKitCallWebPage.html,
+                        baseURL = platform.Foundation.NSURL(string = "https://cdn.jsdelivr.net/"),
+                    )
+                    heldWebView[0] = this
+                }
+            },
+            modifier = Modifier.fillMaxSize(),
+            update = { wv ->
+                heldWebView[0] = wv
+            },
+        )
+
+        if (showInCallControls) {
+            WebCallInCallControls(
+                micOn = micOn,
+                camOn = camOn,
+                onMicToggle = {
+                    val next = !micOn
+                    micOn = next
+                    heldWebView[0]?.evaluateJavaScript(
+                        LiveKitCallWebPage.setMicScript(next),
+                        null,
+                    )
+                },
+                onCamToggle = {
+                    val next = !camOn
+                    camOn = next
+                    heldWebView[0]?.evaluateJavaScript(
+                        LiveKitCallWebPage.setCamScript(next),
+                        null,
+                    )
+                },
+                onEndCall = { CallStore.endCall() },
+                modifier = Modifier.align(Alignment.BottomCenter),
+            )
+        }
+    }
 }

app/shared/src/iosMain/kotlin/ru/fromchat/ui/calls/InlineCallChrome.ios.kt

@@ -1,3 +1,7 @@
 package ru.fromchat.ui.calls
 
-actual val UseInlineInCallChrome: Boolean = false
+/**
+ * When true, [CallMediaLayer] owns in-call mic/camera/end chrome (Android native +
+ * WebView-based iOS/desktop). Call overlays still pass [showInCallControls].
+ */
+actual val UseInlineInCallChrome: Boolean = true

app/shared/src/iosMain/kotlin/ru/fromchat/ui/calls/NotifyIncomingCall.ios.kt

@@ -0,0 +1,3 @@
+package ru.fromchat.ui.calls
+
+internal actual fun notifyIncomingCall(title: String, body: String) = Unit

app/shared/src/iosMain/kotlin/ru/fromchat/ui/chat/utils/AttachmentPickers.ios.kt

@@ -1,21 +1,218 @@
+@file:OptIn(ExperimentalForeignApi::class)
+
 package ru.fromchat.ui.chat.utils
 
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.useContents
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import platform.Foundation.NSCachesDirectory
+import platform.Foundation.NSFileManager
+import platform.Foundation.NSLock
+import platform.Foundation.NSSearchPathForDirectoriesInDomains
+import platform.Foundation.NSURL
+import platform.Foundation.NSUUID
+import platform.Foundation.NSUserDomainMask
+import platform.PhotosUI.PHPickerConfiguration
+import platform.PhotosUI.PHPickerFilter
+import platform.PhotosUI.PHPickerResult
+import platform.PhotosUI.PHPickerViewController
+import platform.PhotosUI.PHPickerViewControllerDelegateProtocol
+import platform.UIKit.UIDocumentPickerDelegateProtocol
+import platform.UIKit.UIDocumentPickerViewController
+import platform.UIKit.UIImage
+import platform.UniformTypeIdentifiers.UTTypeImage
+import platform.UniformTypeIdentifiers.UTTypeItem
+import platform.darwin.NSObject
+import platform.darwin.dispatch_async
+import platform.darwin.dispatch_get_main_queue
+import ru.fromchat.utils.iosTopViewController
 
 actual fun getFilenameFromUri(uri: String): String {
-    return uri.substringAfterLast('/').takeIf { it.isNotBlank() } ?: "file"
+    val path = when {
+        uri.startsWith("file://") -> NSURL.URLWithString(uri)?.path ?: uri
+        else -> uri
+    }
+    return path.substringAfterLast('/').takeIf { it.isNotBlank() } ?: "file"
 }
 
 @Composable
 actual fun rememberImagePicker(onResult: (List<String>) -> Unit): () -> Unit {
-    return { /* Phase 4: PHPickerViewController */ }
+    var activeDelegate by remember { mutableStateOf<ImagePickerDelegate?>(null) }
+    return remember(onResult) {
+        {
+            val host = iosTopViewController() ?: return@remember
+            val picker = PHPickerViewController(
+                configuration = PHPickerConfiguration().apply {
+                    filter = PHPickerFilter.imagesFilter
+                    selectionLimit = 0
+                },
+            )
+            val delegate = ImagePickerDelegate { uris ->
+                activeDelegate = null
+                onResult(uris)
+            }
+            activeDelegate = delegate
+            picker.delegate = delegate
+            host.presentViewController(picker, animated = true, completion = null)
+        }
+    }
 }
 
 @Composable
 actual fun rememberFilePicker(onResult: (List<String>) -> Unit): () -> Unit {
-    return { /* Phase 4: UIDocumentPickerViewController */ }
+    var activeDelegate by remember { mutableStateOf<FilePickerDelegate?>(null) }
+    return remember(onResult) {
+        {
+            val host = iosTopViewController() ?: return@remember
+            val picker = UIDocumentPickerViewController(
+                forOpeningContentTypes = listOf(UTTypeItem),
+                asCopy = true,
+            ).apply {
+                allowsMultipleSelection = true
+            }
+            val delegate = FilePickerDelegate { uris ->
+                activeDelegate = null
+                onResult(uris)
+            }
+            activeDelegate = delegate
+            picker.delegate = delegate
+            host.presentViewController(picker, animated = true, completion = null)
+        }
+    }
 }
 
-actual suspend fun getImageAspectRatio(uri: String): Float? = null
+actual suspend fun getImageAspectRatio(uri: String): Float? {
+    val (w, h) = getImageDimensions(uri) ?: return null
+    if (h == 0) return null
+    return w.toFloat() / h.toFloat()
+}
 
-actual suspend fun getImageDimensions(uri: String): Pair<Int, Int>? = null
+actual suspend fun getImageDimensions(uri: String): Pair<Int, Int>? = withContext(Dispatchers.Default) {
+    val path = when {
+        uri.startsWith("file://") -> NSURL.URLWithString(uri)?.path
+        else -> uri
+    } ?: return@withContext null
+    runCatching {
+        val image = UIImage.imageWithContentsOfFile(path) ?: return@runCatching null
+        pixelSize(image)
+    }.getOrNull()
+}
+
+private fun pixelSize(image: UIImage): Pair<Int, Int>? {
+    val w = (image.size.useContents { width } * image.scale).toInt()
+    val h = (image.size.useContents { height } * image.scale).toInt()
+    if (w <= 0 || h <= 0) return null
+    return w to h
+}
+
+private fun pickerCacheDirectory(): String {
+    val caches = NSSearchPathForDirectoriesInDomains(
+        NSCachesDirectory,
+        NSUserDomainMask,
+        true,
+    ).filterIsInstance<String>().firstOrNull().orEmpty()
+    val dir = "$caches/fromchat/picker"
+    NSFileManager.defaultManager.createDirectoryAtPath(dir, true, null, null)
+    return dir
+}
+
+private fun copyUrlIntoPickerCache(url: NSURL): String? {
+    val name = url.lastPathComponent?.takeIf { it.isNotBlank() } ?: "file"
+    val destPath = "${pickerCacheDirectory()}/${NSUUID().UUIDString}_$name"
+    val destUrl = NSURL.fileURLWithPath(destPath)
+    NSFileManager.defaultManager.removeItemAtPath(destPath, null)
+    if (!NSFileManager.defaultManager.copyItemAtURL(url, toURL = destUrl, error = null)) {
+        return null
+    }
+    return destUrl.absoluteString
+}
+
+private class ImagePickerDelegate(
+    private val onFinished: (List<String>) -> Unit,
+) : NSObject(), PHPickerViewControllerDelegateProtocol {
+    private var finished = false
+    private val lock = NSLock()
+
+    override fun picker(picker: PHPickerViewController, didFinishPicking: List<*>) {
+        picker.dismissViewControllerAnimated(true, completion = null)
+        val results = didFinishPicking.filterIsInstance<PHPickerResult>()
+        if (results.isEmpty()) {
+            finish(emptyList())
+            return
+        }
+        val collected = arrayOfNulls<String>(results.size)
+        var remaining = results.size
+        val typeId = UTTypeImage.identifier
+        results.forEachIndexed { index, result ->
+            val provider = result.itemProvider
+            if (!provider.hasItemConformingToTypeIdentifier(typeId)) {
+                val done = onItemLoaded {
+                    remaining -= 1
+                    remaining == 0
+                }
+                if (done) finish(collected.filterNotNull())
+                return@forEachIndexed
+            }
+            provider.loadFileRepresentationForTypeIdentifier(typeId) { url, _ ->
+                collected[index] = url?.let { copyUrlIntoPickerCache(it) }
+                val done = onItemLoaded {
+                    remaining -= 1
+                    remaining == 0
+                }
+                if (done) {
+                    dispatch_async(dispatch_get_main_queue()) {
+                        finish(collected.filterNotNull())
+                    }
+                }
+            }
+        }
+    }
+
+    private inline fun onItemLoaded(block: () -> Boolean): Boolean {
+        lock.lock()
+        return try {
+            block()
+        } finally {
+            lock.unlock()
+        }
+    }
+
+    private fun finish(uris: List<String>) {
+        if (finished) return
+        finished = true
+        onFinished(uris)
+    }
+}
+
+private class FilePickerDelegate(
+    private val onFinished: (List<String>) -> Unit,
+) : NSObject(), UIDocumentPickerDelegateProtocol {
+    private var finished = false
+
+    private fun finish(uris: List<String>) {
+        if (finished) return
+        finished = true
+        onFinished(uris)
+    }
+
+    override fun documentPicker(
+        controller: UIDocumentPickerViewController,
+        didPickDocumentsAtURLs: List<*>,
+    ) {
+        val uris = didPickDocumentsAtURLs.mapNotNull { raw ->
+            val url = raw as? NSURL ?: return@mapNotNull null
+            copyUrlIntoPickerCache(url) ?: url.absoluteString
+        }
+        finish(uris)
+    }
+
+    override fun documentPickerWasCancelled(controller: UIDocumentPickerViewController) {
+        finish(emptyList())
+    }
+}

app/shared/src/iosMain/kotlin/ru/fromchat/ui/components/BackHandler.ios.kt

@@ -1,4 +1,4 @@
-package ru.fromchat.ui
+package ru.fromchat.ui.components
 
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
@@ -14,8 +14,8 @@ actual fun BackHandler(enabled: Boolean, onBack: () -> Unit) {
 
 @OptIn(ExperimentalForeignApi::class)
 @Composable
-actual fun rememberHapticFeedbackInternal(): (Int) -> Unit {
-    return remember {
+actual fun rememberHapticFeedbackInternal(): (Int) -> Unit =
+    remember {
         { ordinal ->
             val style: UIImpactFeedbackStyle = when (ordinal) {
                 HapticFeedbackEvent.MessageSent.ordinal -> UIImpactFeedbackStyle.UIImpactFeedbackStyleMedium
@@ -23,8 +23,6 @@ actual fun rememberHapticFeedbackInternal(): (Int) -> Unit {
                 HapticFeedbackEvent.SelectionModeEntered.ordinal -> UIImpactFeedbackStyle.UIImpactFeedbackStyleMedium
                 else -> UIImpactFeedbackStyle.UIImpactFeedbackStyleLight
             }
-            val generator = UIImpactFeedbackGenerator(style)
-            generator.impactOccurred()
+            UIImpactFeedbackGenerator(style).impactOccurred()
         }
     }
-}

app/shared/src/iosMain/kotlin/ru/fromchat/ui/debug/DebugApiScreen.ios.kt

@@ -1,8 +0,0 @@
-package ru.fromchat.ui.debug
-
-import androidx.compose.runtime.Composable
-
-@Composable
-actual fun DebugApiScreen() {
-    DebugApiScreenContent()
-}

app/shared/src/iosMain/kotlin/ru/fromchat/ui/main/settings/NotificationsScreen.ios.kt

@@ -11,6 +11,6 @@ actual fun openAppNotificationSettings(): Boolean {
     return UIApplication.sharedApplication.openURL(url)
 }
 
-actual fun areAppNotificationsEnabled(): Boolean {
-    return true
-}
+actual fun areAppNotificationsEnabled(): Boolean = false
+
+actual fun arePushNotificationsSupported(): Boolean = false

app/shared/src/iosMain/kotlin/ru/fromchat/utils/NetworkConnectivity.ios.kt

@@ -1,15 +1,44 @@
+@file:OptIn(ExperimentalForeignApi::class)
+
 package ru.fromchat.utils
 
+import kotlinx.cinterop.ExperimentalForeignApi
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import platform.Network.nw_path_get_status
+import platform.Network.nw_path_monitor_create
+import platform.Network.nw_path_monitor_set_queue
+import platform.Network.nw_path_monitor_set_update_handler
+import platform.Network.nw_path_monitor_start
+import platform.Network.nw_path_monitor_t
+import platform.Network.nw_path_status_satisfied
+import platform.darwin.dispatch_get_main_queue
+import ru.fromchat.api.local.WebSocketManager
 
-// TODO iOS: wired later to NWPathMonitor; default [true] avoids false "offline" when APIs are absent.
 actual object NetworkConnectivity {
     private val _isOnline = MutableStateFlow(true)
     actual val isOnline: StateFlow<Boolean> = _isOnline.asStateFlow()
 
+    private var started = false
+    // Retained so the path monitor is not collected while the process is alive.
+    private var monitor: nw_path_monitor_t = null
+
     actual fun ensureStarted() {
-        // No-op until native path monitoring is bound.
+        if (started) return
+        started = true
+        val pathMonitor = nw_path_monitor_create() ?: return
+        monitor = pathMonitor
+        nw_path_monitor_set_update_handler(pathMonitor) { path ->
+            val online = nw_path_get_status(path) == nw_path_status_satisfied
+            val wasOnline = _isOnline.value
+            _isOnline.value = online
+            when {
+                online && !wasOnline -> WebSocketManager.onNetworkAvailable()
+                !online && wasOnline -> WebSocketManager.onNetworkLost()
+            }
+        }
+        nw_path_monitor_set_queue(pathMonitor, dispatch_get_main_queue())
+        nw_path_monitor_start(pathMonitor)
     }
 }

app/shared/src/jvmMain/kotlin/ru/fromchat/KeepWebSocketAlive.jvm.kt

@@ -0,0 +1,3 @@
+package ru.fromchat
+
+actual fun keepWebSocketAliveInBackground(): Boolean = true

app/shared/src/jvmMain/kotlin/ru/fromchat/Logger.jvm.kt

@@ -0,0 +1,33 @@
+package ru.fromchat
+
+import ru.fromchat.logging.AppLogLevel
+import ru.fromchat.logging.AppLogStore
+
+actual object Logger {
+    actual fun d(tag: String, message: String, throwable: Throwable?) {
+        AppLogStore.record(AppLogLevel.Debug, tag, message, throwable)
+        println("DEBUG: [$tag] $message ${throwable?.message ?: ""}")
+    }
+
+    actual fun i(tag: String, message: String, throwable: Throwable?) {
+        AppLogStore.record(AppLogLevel.Info, tag, message, throwable)
+        println("INFO: [$tag] $message ${throwable?.message ?: ""}")
+    }
+
+    actual fun w(tag: String, message: String, throwable: Throwable?) {
+        AppLogStore.record(AppLogLevel.Warn, tag, message, throwable)
+        System.err.println("WARN: [$tag] $message ${throwable?.message ?: ""}")
+    }
+
+    actual fun e(tag: String, message: String, throwable: Throwable?) {
+        AppLogStore.record(AppLogLevel.Error, tag, message, throwable)
+        System.err.println("ERROR: [$tag] $message ${throwable?.message ?: ""}")
+        throwable?.printStackTrace()
+    }
+
+    actual fun f(tag: String, message: String, throwable: Throwable?) {
+        AppLogStore.record(AppLogLevel.Fatal, tag, message, throwable)
+        System.err.println("FATAL: [$tag] $message ${throwable?.message ?: ""}")
+        throwable?.printStackTrace()
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/ApiClient.jvm.kt

@@ -0,0 +1,32 @@
+package ru.fromchat.api
+
+import io.ktor.client.HttpClient
+import io.ktor.client.HttpClientConfig
+import io.ktor.client.engine.cio.CIO
+import io.ktor.client.plugins.HttpTimeout
+import io.ktor.client.plugins.defaultRequest
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
+
+actual fun createPlatformHttpClient(
+    block: HttpClientConfig<*>.() -> Unit
+): HttpClient {
+    return HttpClient(CIO) {
+        defaultRequest {
+            contentType(ContentType.Application.Json)
+
+            headers {
+                append("Accept-Charset", "utf-8")
+                append("Content-Type", "application/json; charset=utf-8")
+            }
+        }
+
+        install(HttpTimeout) {
+            requestTimeoutMillis = 30_000
+            connectTimeoutMillis = 5_000
+            socketTimeoutMillis = 30_000
+        }
+
+        block(this)
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/DeferredStartupNetwork.jvm.kt

@@ -0,0 +1,3 @@
+package ru.fromchat.api
+
+actual suspend fun syncPushTokenAfterStartup() = Unit

app/shared/src/jvmMain/kotlin/ru/fromchat/api/FcmRegistration.jvm.kt

@@ -0,0 +1,9 @@
+package ru.fromchat.api
+
+actual suspend fun uploadPendingFcmTokenIfAvailable() = Unit
+
+actual suspend fun ensureFcmTokenRegistered(): Boolean = false
+
+actual suspend fun unregisterFcmTokenFromServer(): Boolean = false
+
+actual suspend fun isFcmPushRegisteredLocally(): Boolean = false

app/shared/src/jvmMain/kotlin/ru/fromchat/api/crypto/backup/BackupCrypto.jvm.kt

@@ -0,0 +1,82 @@
+package ru.fromchat.api.crypto.backup
+
+import dev.whyoleg.cryptography.BinarySize.Companion.bits
+import dev.whyoleg.cryptography.BinarySize.Companion.bytes
+import dev.whyoleg.cryptography.CryptographyProvider
+import dev.whyoleg.cryptography.DelicateCryptographyApi
+import dev.whyoleg.cryptography.algorithms.AES
+import dev.whyoleg.cryptography.algorithms.PBKDF2
+import dev.whyoleg.cryptography.algorithms.SHA256
+import dev.whyoleg.cryptography.random.CryptographyRandom
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+private const val PBKDF2_ITERATIONS = 210_000
+private const val IV_SIZE = 12
+private const val KEY_SIZE_BYTES = 32
+
+@OptIn(DelicateCryptographyApi::class)
+actual object BackupCrypto {
+    private val provider get() = CryptographyProvider.Default
+    private val aesGcm get() = provider.get(AES.GCM)
+    private val pbkdf2 get() = provider.get(PBKDF2)
+
+    actual suspend fun encryptBackupWithPassword(
+        password: String,
+        bundle: PrivateKeyBundle
+    ): EncryptedBackupBlob = withContext(Dispatchers.Default) {
+        val salt = CryptographyRandom.nextBytes(16)
+        val nonce = CryptographyRandom.nextBytes(IV_SIZE)
+
+        EncryptedBackupBlob(
+            salt,
+            nonce,
+            aesGcm
+                .keyDecoder()
+                .decodeFromByteArray(
+                    AES.Key.Format.RAW,
+                    pbkdf2
+                        .secretDerivation(
+                            digest = SHA256,
+                            iterations = PBKDF2_ITERATIONS,
+                            outputSize = KEY_SIZE_BYTES.bytes,
+                            salt = salt
+                        )
+                        .deriveSecretBlocking(
+                            password.encodeToByteArray()
+                        )
+                        .toByteArray()
+                )
+                .cipher(tagSize = 128.bits)
+                .encryptWithIv(nonce, serializeBundle(bundle))
+        )
+    }
+
+    actual suspend fun decryptBackupWithPassword(
+        password: String,
+        blob: EncryptedBackupBlob
+    ): PrivateKeyBundle = withContext(Dispatchers.Default) {
+        deserializeBundle(
+            aesGcm
+                .keyDecoder()
+                .decodeFromByteArray(
+                    AES.Key.Format.RAW,
+                    pbkdf2
+                        .secretDerivation(
+                            digest = SHA256,
+                            iterations = PBKDF2_ITERATIONS,
+                            outputSize = KEY_SIZE_BYTES.bytes,
+                            salt = blob.salt
+                        )
+                        .deriveSecretBlocking(
+                            password.encodeToByteArray()
+                        )
+                        .toByteArray()
+                )
+                .cipher(tagSize = 128.bits)
+                .decryptWithIv(blob.iv, blob.ciphertext)
+        )
+    }
+
+    actual fun randomBytes(length: Int): ByteArray = CryptographyRandom.nextBytes(length)
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/crypto/dm/DmCrypto.jvm.kt

@@ -0,0 +1,117 @@
+package ru.fromchat.api.crypto.dm
+
+import com.pr0gramm3r101.utils.crypto.Base64
+import com.pr0gramm3r101.utils.require
+import dev.whyoleg.cryptography.BinarySize.Companion.bits
+import dev.whyoleg.cryptography.CryptographyProvider
+import dev.whyoleg.cryptography.DelicateCryptographyApi
+import dev.whyoleg.cryptography.algorithms.AES
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import ru.fromchat.api.crypto.DmCiphertextCorruptedException
+
+private const val AES_KEY_SIZE = 32
+private const val GCM_IV_SIZE = 12
+private const val GCM_TAG_SIZE = 16
+
+@OptIn(DelicateCryptographyApi::class)
+actual object DmCrypto {
+    private val provider get() = CryptographyProvider.Default
+    private val aesGcm get() = provider.get(AES.GCM)
+
+    actual suspend fun unwrapMek(
+        wrappedMekB64: String,
+        wrappingKey: ByteArray
+    ) = withContext(Dispatchers.Default) {
+        require(wrappingKey.size == AES_KEY_SIZE) { "Wrapping key must be 32 bytes" }
+        val wrapped = Base64.decode(wrappedMekB64)
+        require(wrapped.size >= GCM_IV_SIZE + GCM_TAG_SIZE) { "Wrapped MEK too short" }
+
+        try {
+            aesGcmDecrypt(
+                wrappingKey,
+                wrapped.sliceArray(0 until GCM_IV_SIZE),
+                wrapped.sliceArray(GCM_IV_SIZE until wrapped.size)
+            )
+        } catch (e: Throwable) {
+            throw DmCiphertextCorruptedException(cause = e)
+        }
+    }
+
+    actual suspend fun decryptEnvelope(
+        ivB64: String,
+        ciphertextB64: String,
+        mek: ByteArray,
+    ) = withContext(Dispatchers.Default) {
+        val key = mek.require("MEK must be 32 bytes") {
+            it.size == AES_KEY_SIZE
+        }
+        val iv = Base64
+            .decode(ivB64)
+            .require("IV must be 12 bytes") {
+                it.size == GCM_IV_SIZE
+            }
+        val ciphertext = Base64
+            .decode(ciphertextB64)
+            .require("Ciphertext too short") {
+                it.size >= GCM_TAG_SIZE
+            }
+        try {
+            aesGcmDecrypt(key, iv, ciphertext)
+        } catch (e: Throwable) {
+            throw DmCiphertextCorruptedException(cause = e)
+        }
+    }
+
+    actual suspend fun decryptAesGcm(
+        ivB64: String,
+        ciphertext: ByteArray,
+        mek: ByteArray,
+    ) = withContext(Dispatchers.Default) {
+        val key = mek.require("MEK must be 32 bytes") {
+            it.size == AES_KEY_SIZE
+        }
+        val iv = Base64
+            .decode(ivB64)
+            .require("IV must be 12 bytes") {
+                it.size == GCM_IV_SIZE
+            }
+        ciphertext.require("Ciphertext too short") {
+            it.size >= GCM_TAG_SIZE
+        }
+        try {
+            aesGcmDecrypt(key, iv, ciphertext)
+        } catch (e: Throwable) {
+            throw DmCiphertextCorruptedException(cause = e)
+        }
+    }
+
+    actual suspend fun decryptAesGcmFileToPath(
+        ivB64: String,
+        encryptedFilePath: String,
+        mek: ByteArray,
+        outputPath: String,
+    ): Long = withContext(Dispatchers.Default) {
+        val iv = Base64
+            .decode(ivB64)
+            .require("IV must be 12 bytes") {
+                it.size == GCM_IV_SIZE
+            }
+        DmFileOps.aesGcmDecryptFileToPath(iv, encryptedFilePath, mek, outputPath)
+    }
+
+    private suspend fun aesGcmDecrypt(key: ByteArray, iv: ByteArray, ciphertext: ByteArray): ByteArray {
+        require(iv.size == GCM_IV_SIZE) { "IV must be 12 bytes for GCM" }
+        require(key.size == AES_KEY_SIZE) { "Key must be 32 bytes" }
+        require(ciphertext.size >= GCM_TAG_SIZE) { "Ciphertext too short" }
+
+        return aesGcm
+            .keyDecoder()
+            .decodeFromByteArray(
+                AES.Key.Format.RAW,
+                key
+            )
+            .cipher(tagSize = 128.bits)
+            .decryptWithIv(iv, ciphertext)
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/crypto/dm/PlatformAesGcmStreamDecrypt.jvm.kt

@@ -0,0 +1,117 @@
+package ru.fromchat.api.crypto.dm
+
+import com.pr0gramm3r101.utils.files.PlatformFileSystem
+import dev.whyoleg.cryptography.BinarySize.Companion.bits
+import dev.whyoleg.cryptography.CryptographyProvider
+import dev.whyoleg.cryptography.DelicateCryptographyApi
+import dev.whyoleg.cryptography.algorithms.AES
+import java.io.File
+import java.io.FileInputStream
+import java.io.FileOutputStream
+import kotlinx.io.Buffer
+import kotlinx.io.RawSink
+import kotlinx.io.RawSource
+import kotlinx.io.buffered
+
+private const val AES_KEY_SIZE = 32
+private const val GCM_IV_SIZE = 12
+private const val GCM_TAG_SIZE = 16
+private const val COPY_BUFFER_BYTES = 256 * 1024
+
+@OptIn(DelicateCryptographyApi::class)
+internal actual suspend fun platformAesGcmStreamDecryptMekFile(
+    iv: ByteArray,
+    encryptedPath: String,
+    key: ByteArray,
+    outputPath: String,
+): Long {
+    require(key.size == AES_KEY_SIZE) { "MEK must be 32 bytes" }
+    require(iv.size == GCM_IV_SIZE) { "IV must be 12 bytes" }
+    val encryptedSize = PlatformFileSystem.fileSize(encryptedPath)
+    require(encryptedSize >= GCM_TAG_SIZE) { "Ciphertext too short" }
+
+    val parent = outputPath.substringBeforeLast('/', missingDelimiterValue = "")
+    if (parent.isNotEmpty()) {
+        PlatformFileSystem.ensureDirectory(parent)
+    }
+    if (PlatformFileSystem.exists(outputPath)) {
+        PlatformFileSystem.delete(outputPath)
+    }
+
+    val aesKey = CryptographyProvider.Default
+        .get(AES.GCM)
+        .keyDecoder()
+        .decodeFromByteArray(AES.Key.Format.RAW, key)
+    val cipher = aesKey.cipher(tagSize = 128.bits)
+
+    FileEncryptedRawSource(encryptedPath).buffered().use { encryptedSource ->
+        FileRawSink(outputPath).buffered().use { plainSink ->
+            cipher.decryptingSinkWithIv(iv, plainSink).buffered().use { decryptSink ->
+                pumpRawSourceToSink(encryptedSource, decryptSink)
+            }
+        }
+    }
+
+    val plaintextBytes = PlatformFileSystem.fileSize(outputPath)
+    require(plaintextBytes > 0L) { "Decrypted file is empty" }
+    return plaintextBytes
+}
+
+private suspend fun pumpRawSourceToSink(source: RawSource, sink: RawSink) {
+    val chunk = Buffer()
+    while (true) {
+        val read = source.readAtMostTo(chunk, COPY_BUFFER_BYTES.toLong())
+        if (read < 0L) break
+        if (read == 0L) continue
+        sink.write(chunk, read)
+    }
+    sink.flush()
+}
+
+private class FileEncryptedRawSource(
+    path: String,
+) : RawSource {
+    private val input = FileInputStream(File(path))
+
+    override fun readAtMostTo(sink: Buffer, byteCount: Long): Long {
+        if (byteCount <= 0L) return 0L
+        val toRead = byteCount.coerceAtMost(COPY_BUFFER_BYTES.toLong()).toInt()
+        val array = ByteArray(toRead)
+        val read = input.read(array)
+        if (read <= 0) return -1L
+        sink.write(array, 0, read)
+        return read.toLong()
+    }
+
+    override fun close() {
+        input.close()
+    }
+}
+
+private class FileRawSink(
+    path: String,
+) : RawSink {
+    private val output = FileOutputStream(File(path))
+
+    override fun write(source: Buffer, byteCount: Long) {
+        if (byteCount <= 0L) return
+        var remaining = byteCount
+        while (remaining > 0L) {
+            val toRead = minOf(remaining, COPY_BUFFER_BYTES.toLong()).toInt()
+            val array = ByteArray(toRead)
+            val read = source.readAtMostTo(array, startIndex = 0, endIndex = toRead)
+            if (read <= 0) break
+            output.write(array, 0, read)
+            remaining -= read
+        }
+    }
+
+    override fun flush() {
+        output.flush()
+    }
+
+    override fun close() {
+        output.flush()
+        output.close()
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/crypto/transport/TransportCrypto.jvm.kt

@@ -0,0 +1,86 @@
+@file:OptIn(ExperimentalUnsignedTypes::class)
+
+package ru.fromchat.api.crypto.transport
+
+import com.ionspin.kotlin.crypto.LibsodiumInitializer
+import com.ionspin.kotlin.crypto.box.Box
+import com.ionspin.kotlin.crypto.box.crypto_box_NONCEBYTES
+import com.ionspin.kotlin.crypto.util.LibsodiumRandom
+import com.pr0gramm3r101.utils.crypto.Base64
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import ru.fromchat.api.crypto.transport.TransportCiphertext
+
+actual object TransportCrypto {
+    actual suspend fun encryptWithTransportKey(
+        plaintext: String,
+        transportPublicKeyB64: String
+    ) = withContext(Dispatchers.Default) {
+        if (!LibsodiumInitializer.isInitialized()) {
+            LibsodiumInitializer.initialize()
+        }
+        val keyPair = Box.keypair()
+        val nonce = LibsodiumRandom.buf(crypto_box_NONCEBYTES)
+        val ciphertext = Box.easy(
+            plaintext.encodeToByteArray().toUByteArray(),
+            nonce,
+            Base64.decode(transportPublicKeyB64).toUByteArray(),
+            keyPair.secretKey
+        )
+        val cipher = TransportCiphertext(
+            clientPublicKeyB64 = Base64.encode(keyPair.publicKey.toByteArray()),
+            nonceB64 = Base64.encode(nonce.toByteArray()),
+            ciphertextB64 = Base64.encode(ciphertext.toByteArray())
+        )
+        keyPair.secretKey.fill(0u)
+        cipher
+    }
+
+    actual suspend fun encryptWithTransportKeyWithEphemeralSecret(
+        plaintext: String,
+        transportPublicKeyB64: String
+    ): Pair<TransportCiphertext, ByteArray> = withContext(Dispatchers.Default) {
+        if (!LibsodiumInitializer.isInitialized()) {
+            LibsodiumInitializer.initialize()
+        }
+        val keyPair = Box.keypair()
+        val nonce = LibsodiumRandom.buf(crypto_box_NONCEBYTES)
+        val ciphertext = Box.easy(
+            plaintext.encodeToByteArray().toUByteArray(),
+            nonce,
+            Base64.decode(transportPublicKeyB64).toUByteArray(),
+            keyPair.secretKey
+        )
+        val cipher = TransportCiphertext(
+            clientPublicKeyB64 = Base64.encode(keyPair.publicKey.toByteArray()),
+            nonceB64 = Base64.encode(nonce.toByteArray()),
+            ciphertextB64 = Base64.encode(ciphertext.toByteArray())
+        )
+        val secretCopy = keyPair.secretKey.toByteArray().copyOf()
+        keyPair.secretKey.fill(0u)
+        cipher to secretCopy
+    }
+
+    actual suspend fun encryptFileForTransport(
+        fileBytes: ByteArray,
+        transportPublicKeyB64: String,
+        ephemeralSecretKey: ByteArray
+    ): ByteArray = withContext(Dispatchers.Default) {
+        if (!LibsodiumInitializer.isInitialized()) {
+            LibsodiumInitializer.initialize()
+        }
+        val nonce = LibsodiumRandom.buf(crypto_box_NONCEBYTES)
+        val ciphertext = Box.easy(
+            fileBytes.toUByteArray(),
+            nonce,
+            Base64.decode(transportPublicKeyB64).toUByteArray(),
+            ephemeralSecretKey.toUByteArray()
+        )
+        val nonceBytes = nonce.toByteArray()
+        val cipherBytes = ciphertext.toByteArray()
+        val result = ByteArray(nonceBytes.size + cipherBytes.size)
+        nonceBytes.copyInto(result, 0, 0, nonceBytes.size)
+        cipherBytes.copyInto(result, nonceBytes.size, 0, cipherBytes.size)
+        result
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/crypto/transport/TransportFileEncryptor.jvm.kt

@@ -0,0 +1,32 @@
+package ru.fromchat.api.crypto.transport
+
+import java.io.File
+import java.io.FileOutputStream
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+actual object TransportFileEncryptor {
+    actual suspend fun encryptPlaintextFileToTransportBlob(
+        sourceUri: String,
+        destinationPath: String,
+        transportPublicKeyB64: String,
+        ephemeralSecretKey: ByteArray,
+        plaintextSizeBytes: Long,
+        onPlaintextProgress: ((bytesRead: Long, totalBytes: Long) -> Unit)?,
+    ): Long = withContext(Dispatchers.IO) {
+        val dest = File(destinationPath)
+        dest.parentFile?.mkdirs()
+        dest.delete()
+        FileOutputStream(dest).use { output ->
+            encryptPlaintextFileToFcaeBlob(
+                sourceUri = sourceUri,
+                writeBytes = { bytes -> output.write(bytes) },
+                finish = { dest.length() },
+                transportPublicKeyB64 = transportPublicKeyB64,
+                ephemeralSecretKey = ephemeralSecretKey,
+                plaintextSizeBytes = plaintextSizeBytes,
+                onPlaintextProgress = onPlaintextProgress,
+            )
+        }
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/crypto/transport/TransportFileKey.jvm.kt

@@ -0,0 +1,55 @@
+package ru.fromchat.api.crypto.transport
+
+import com.ionspin.kotlin.crypto.LibsodiumInitializer
+import com.ionspin.kotlin.crypto.box.Box
+import com.pr0gramm3r101.utils.crypto.Base64
+import dev.whyoleg.cryptography.BinarySize.Companion.bits
+import dev.whyoleg.cryptography.CryptographyProvider
+import dev.whyoleg.cryptography.DelicateCryptographyApi
+import dev.whyoleg.cryptography.algorithms.AES
+import dev.whyoleg.cryptography.random.CryptographyRandom
+import java.util.concurrent.CountDownLatch
+import javax.crypto.Mac
+import javax.crypto.spec.SecretKeySpec
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+private const val IV_SIZE = 12
+
+@OptIn(DelicateCryptographyApi::class)
+private val aesGcm get() = CryptographyProvider.Default.get(AES.GCM)
+
+private fun ensureLibsodiumInitialized() {
+    if (LibsodiumInitializer.isInitialized()) return
+    val latch = CountDownLatch(1)
+    LibsodiumInitializer.initializeWithCallback { latch.countDown() }
+    latch.await()
+}
+
+@OptIn(ExperimentalUnsignedTypes::class)
+internal actual fun deriveTransportFileAesKey(
+    transportPublicKeyB64: String,
+    ephemeralSecretKey: ByteArray,
+): ByteArray {
+    ensureLibsodiumInitialized()
+    val transportPublicKey = Base64.decode(transportPublicKeyB64).toUByteArray()
+    val shared = Box.beforeNM(transportPublicKey, ephemeralSecretKey.toUByteArray()).toByteArray()
+    return hkdfTransportFileKey(shared)
+}
+
+@OptIn(DelicateCryptographyApi::class)
+internal actual suspend fun aesGcmEncryptChunk(
+    key: ByteArray,
+    plaintext: ByteArray,
+): Pair<ByteArray, ByteArray> = withContext(Dispatchers.Default) {
+    val iv = CryptographyRandom.nextBytes(IV_SIZE)
+    val cipherKey = aesGcm.keyDecoder().decodeFromByteArray(AES.Key.Format.RAW, key)
+    val ciphertext = cipherKey.cipher(tagSize = 128.bits).encryptWithIv(iv, plaintext)
+    iv to ciphertext
+}
+
+internal actual fun hmacSha256(key: ByteArray, data: ByteArray): ByteArray {
+    val mac = Mac.getInstance("HmacSHA256")
+    mac.init(SecretKeySpec(key, "HmacSHA256"))
+    return mac.doFinal(data)
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/cache/AttachmentDiskThumbnail.jvm.kt

@@ -0,0 +1,31 @@
+package ru.fromchat.api.local.cache
+
+import java.awt.Image
+import java.awt.image.BufferedImage
+import java.io.File
+import javax.imageio.ImageIO
+
+actual fun generateAttachmentDiskThumbnail(
+    sourceAbsolutePath: String,
+    destAbsolutePath: String,
+    maxEdgePx: Int,
+): Boolean {
+    return runCatching {
+        val source = ImageIO.read(File(sourceAbsolutePath)) ?: return false
+        val width = source.width
+        val height = source.height
+        if (width <= 0 || height <= 0) return false
+        val longEdge = maxOf(width, height)
+        val scale = if (longEdge > maxEdgePx) maxEdgePx.toDouble() / longEdge else 1.0
+        val dstW = (width * scale).toInt().coerceAtLeast(1)
+        val dstH = (height * scale).toInt().coerceAtLeast(1)
+        val scaled = source.getScaledInstance(dstW, dstH, Image.SCALE_SMOOTH)
+        val buffered = BufferedImage(dstW, dstH, BufferedImage.TYPE_INT_RGB)
+        val graphics = buffered.createGraphics()
+        graphics.drawImage(scaled, 0, 0, null)
+        graphics.dispose()
+        val dest = File(destAbsolutePath)
+        dest.parentFile?.mkdirs()
+        ImageIO.write(buffered, "jpg", dest)
+    }.getOrDefault(false)
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/cache/AttachmentUploadLimits.jvm.kt

@@ -0,0 +1,5 @@
+package ru.fromchat.api.local.cache
+
+private const val JVM_MAX_BYTES = 64L * 1024L * 1024L
+
+actual fun maxInMemoryEncryptPlaintextBytes(): Long = JVM_MAX_BYTES

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/cache/FileWriteSink.jvm.kt

@@ -0,0 +1,27 @@
+package ru.fromchat.api.local.cache
+
+import java.io.File
+import java.io.FileOutputStream
+
+internal actual class FileWriteSink actual constructor(
+    path: String,
+    append: Boolean,
+) : AutoCloseable {
+    private val output = FileOutputStream(File(path), append)
+
+    actual fun write(buffer: ByteArray, offset: Int, length: Int) {
+        if (length <= 0) return
+        output.write(buffer, offset, length)
+    }
+
+    actual fun flush() {
+        output.flush()
+        output.fd.sync()
+    }
+
+    actual override fun close() {
+        output.flush()
+        output.fd.sync()
+        output.close()
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/cache/FromChatCacheDirs.jvm.kt

@@ -0,0 +1,37 @@
+package ru.fromchat.api.local.cache
+
+import java.io.File
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+private fun cacheRoot(): File {
+    val home = System.getProperty("user.home")
+    return if (!home.isNullOrBlank()) {
+        File(home, ".fromchat/cache")
+    } else {
+        File(System.getProperty("java.io.tmpdir"), "fromchat")
+    }
+}
+
+actual suspend fun wipeFromChatCacheDirectory() {
+    withContext(Dispatchers.IO) {
+        File(cacheRoot(), "fromchat").deleteRecursively()
+    }
+}
+
+actual suspend fun wipeAttachmentCacheDirectories() {
+    withContext(Dispatchers.IO) {
+        val base = cacheRoot()
+        listOf("decrypted_images", "decrypted_files", "encrypted_downloads").forEach { name ->
+            File(base, name).deleteRecursively()
+        }
+    }
+}
+
+actual suspend fun wipeInstanceAuxiliaryCacheDirectory(instanceId: String) {
+    withContext(Dispatchers.IO) {
+        val safe = instanceId.trim().replace(Regex("[^a-zA-Z0-9._-]"), "_")
+        if (safe.isEmpty()) return@withContext
+        File(cacheRoot(), "fromchat/instances/$safe").deleteRecursively()
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/cache/FromChatCacheGeneration.jvm.kt

@@ -0,0 +1,38 @@
+package ru.fromchat.api.local.cache
+
+import java.io.File
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import ru.fromchat.api.local.db.store.MessageDatabaseProvider
+
+private const val GENERATION_FILE = ".generation"
+
+private fun fromChatRoot(): File {
+    val home = System.getProperty("user.home")
+    val base = if (!home.isNullOrBlank()) {
+        File(home, ".fromchat/cache")
+    } else {
+        File(System.getProperty("java.io.tmpdir"), "fromchat")
+    }
+    return File(base, "fromchat")
+}
+
+actual suspend fun ensureFromChatCacheGeneration() {
+    withContext(Dispatchers.IO) {
+        val root = fromChatRoot()
+        val marker = File(root, GENERATION_FILE)
+        if (marker.isFile) return@withContext
+        MessageDatabaseProvider.closeAndReset()
+        wipeFromChatCacheDirectory()
+        root.mkdirs()
+        marker.writeText("1\n")
+    }
+}
+
+actual suspend fun writeFromChatCacheGeneration() {
+    withContext(Dispatchers.IO) {
+        val root = fromChatRoot()
+        root.mkdirs()
+        File(root, GENERATION_FILE).writeText("1\n")
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/cache/PendingFileSaveRegistry.jvm.kt

@@ -0,0 +1,38 @@
+package ru.fromchat.api.local.cache
+
+import java.io.File
+import java.net.URI
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.launch
+import ru.fromchat.api.local.download.cachedAttachmentFileSize
+
+private val copyScope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+
+internal actual fun enqueuePlatformCopy(storageKey: String) {
+    copyScope.launch {
+        val entry = PendingFileSaveRegistry.listPending()
+            .firstOrNull { it.storageKey == storageKey } ?: return@launch
+        val cacheUri = DecryptedFileCache.getCachedUriForStorageKey(storageKey) ?: return@launch
+        if (cachedAttachmentFileSize(cacheUri) <= 0L) return@launch
+        val bytes = runCatching { readOutboundFileBytes(cacheUri) }.getOrNull() ?: return@launch
+        if (bytes.isEmpty()) return@launch
+        if (writeBytesToDestinationUri(entry.destinationUri, bytes)) {
+            PendingFileSaveRegistry.remove(storageKey)
+        }
+    }
+}
+
+private fun writeBytesToDestinationUri(destinationUri: String, bytes: ByteArray): Boolean {
+    val path = when {
+        destinationUri.startsWith("file:") -> runCatching { URI(destinationUri).path }.getOrNull()
+        else -> destinationUri
+    } ?: return false
+    return runCatching {
+        val file = File(path)
+        file.parentFile?.mkdirs()
+        file.writeBytes(bytes)
+        true
+    }.getOrDefault(false)
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/cache/ResumableUploadStorage.jvm.kt

@@ -0,0 +1,351 @@
+package ru.fromchat.api.local.cache
+
+import java.io.File
+import java.io.FileInputStream
+import java.io.FileOutputStream
+import java.io.InputStream
+import java.net.URI
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+private fun cacheRoot(): File {
+    val home = System.getProperty("user.home")
+    return if (!home.isNullOrBlank()) {
+        File(home, ".fromchat/cache")
+    } else {
+        File(System.getProperty("java.io.tmpdir"), "fromchat")
+    }
+}
+
+private fun uploadDir(instanceId: String): File {
+    val safe = instanceId.replace(Regex("[^a-zA-Z0-9._-]"), "_")
+    return File(cacheRoot(), "fromchat/instances/$safe/uploads").apply { mkdirs() }
+}
+
+private fun safeId(clientMessageId: String): String =
+    clientMessageId.replace(Regex("[^a-zA-Z0-9._-]"), "_")
+
+private fun sourceFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.source")
+
+private fun sourcePartFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.source.part")
+
+private fun sourceOkFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.source.ok")
+
+private fun blobFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.enc")
+
+private fun blobPartFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.enc.part")
+
+private fun blobOkFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.enc.ok")
+
+private fun cipherFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.cipher.json")
+
+private fun cipherPartFile(instanceId: String, clientMessageId: String): File =
+    File(uploadDir(instanceId), "${safeId(clientMessageId)}.cipher.json.part")
+
+actual fun encryptedUploadBlobPath(instanceId: String, clientMessageId: String): String =
+    blobFile(instanceId, clientMessageId).absolutePath
+
+actual fun encryptedUploadBlobPartPath(instanceId: String, clientMessageId: String): String =
+    blobPartFile(instanceId, clientMessageId).absolutePath
+
+private fun readOkMarker(okFile: File, diskFile: File, expectedBytes: Long): Boolean {
+    if (!okFile.isFile || !diskFile.isFile) return false
+    val marker = decodeUploadArtifactOkMarker(okFile.readText()) ?: return false
+    return marker.isValidOnDisk(diskFile.length(), expectedBytes)
+}
+
+private fun writeOkMarker(okFile: File, actualBytes: Long, expectedBytes: Long) {
+    okFile.writeText(encodeUploadArtifactOkMarker(actualBytes, expectedBytes))
+}
+
+private fun File.syncOutput() {
+    FileOutputStream(this, true).use { it.fd.sync() }
+}
+
+private fun atomicReplace(part: File, final: File) {
+    if (!part.isFile) error("Partial upload file missing")
+    final.delete()
+    if (!part.renameTo(final)) {
+        part.copyTo(final, overwrite = true)
+        part.delete()
+    }
+    final.syncOutput()
+}
+
+private fun resolveLocalPath(fileUri: String): String? =
+    when {
+        fileUri.startsWith("file:") -> runCatching { URI(fileUri).path }.getOrNull()
+        else -> fileUri
+    }
+
+actual suspend fun queryOutboundUriSizeBytes(fileUri: String): Long? = withContext(Dispatchers.IO) {
+    val path = resolveLocalPath(fileUri) ?: return@withContext null
+    val file = File(path)
+    if (!file.isFile) null else file.length()
+}
+
+actual suspend fun stageOutboundFileForUpload(
+    instanceId: String,
+    clientMessageId: String,
+    sourceUri: String,
+    expectedSizeBytes: Long,
+): StagedOutboundFile = withContext(Dispatchers.IO) {
+    repairInterruptedUploadArtifacts(instanceId, clientMessageId)
+    val dest = sourceFile(instanceId, clientMessageId)
+    val destUri = dest.absolutePath
+    if (sourceUri == destUri || resolveLocalPath(sourceUri) == destUri) {
+        if (!isStagedSourceReady(instanceId, clientMessageId, expectedSizeBytes)) {
+            throw OutboundFileUnavailableException("Staged source file is incomplete")
+        }
+        return@withContext StagedOutboundFile(uri = destUri, sizeBytes = dest.length())
+    }
+    if (isStagedSourceReady(instanceId, clientMessageId, expectedSizeBytes)) {
+        return@withContext StagedOutboundFile(uri = destUri, sizeBytes = dest.length())
+    }
+    val part = sourcePartFile(instanceId, clientMessageId)
+    dest.delete()
+    sourceOkFile(instanceId, clientMessageId).delete()
+    part.delete()
+    val sourcePath = resolveLocalPath(sourceUri)
+        ?: throw OutboundFileUnavailableException("Invalid file URI")
+    val source = File(sourcePath)
+    if (!source.isFile) throw OutboundFileUnavailableException("Failed to read file from URI")
+    source.inputStream().use { inputStream ->
+        FileOutputStream(part).use { output ->
+            inputStream.copyTo(output)
+            output.flush()
+            output.fd.sync()
+        }
+    }
+    atomicReplace(part, dest)
+    val stagedBytes = dest.length()
+    val expected = expectedSizeBytes.takeIf { it > 0L } ?: stagedBytes
+    if (expectedSizeBytes > 0L && stagedBytes != expectedSizeBytes) {
+        dest.delete()
+        sourceOkFile(instanceId, clientMessageId).delete()
+        throw OutboundFileUnavailableException("Staged file size mismatch")
+    }
+    writeOkMarker(sourceOkFile(instanceId, clientMessageId), stagedBytes, expected)
+    StagedOutboundFile(uri = destUri, sizeBytes = stagedBytes)
+}
+
+actual suspend fun isStagedSourceReady(
+    instanceId: String,
+    clientMessageId: String,
+    expectedSizeBytes: Long,
+): Boolean = withContext(Dispatchers.IO) {
+    readOkMarker(
+        sourceOkFile(instanceId, clientMessageId),
+        sourceFile(instanceId, clientMessageId),
+        expectedSizeBytes,
+    )
+}
+
+actual suspend fun isEncryptedBlobReady(
+    instanceId: String,
+    clientMessageId: String,
+    expectedEncryptedSizeBytes: Long?,
+): Boolean = withContext(Dispatchers.IO) {
+    val expected = expectedEncryptedSizeBytes?.takeIf { it > 0L } ?: 0L
+    val enc = blobFile(instanceId, clientMessageId)
+    val ok = blobOkFile(instanceId, clientMessageId)
+    if (!readOkMarker(ok, enc, expected)) return@withContext false
+    cipherFile(instanceId, clientMessageId).isFile
+}
+
+actual suspend fun commitEncryptedUploadBlob(
+    instanceId: String,
+    clientMessageId: String,
+    encryptedSizeBytes: Long,
+): Unit = withContext(Dispatchers.IO) {
+    val part = blobPartFile(instanceId, clientMessageId)
+    val final = blobFile(instanceId, clientMessageId)
+    if (part.isFile) {
+        atomicReplace(part, final)
+    } else if (!final.isFile) {
+        error("Encrypted upload blob missing")
+    }
+    if (final.length() != encryptedSizeBytes) {
+        throw OutboundFileUnavailableException("Encrypted blob size mismatch after commit")
+    }
+    writeOkMarker(blobOkFile(instanceId, clientMessageId), encryptedSizeBytes, encryptedSizeBytes)
+}
+
+actual suspend fun repairInterruptedUploadArtifacts(
+    instanceId: String,
+    clientMessageId: String,
+): Unit = withContext(Dispatchers.IO) {
+    sourcePartFile(instanceId, clientMessageId).delete()
+    blobPartFile(instanceId, clientMessageId).delete()
+    cipherPartFile(instanceId, clientMessageId).delete()
+    val enc = blobFile(instanceId, clientMessageId)
+    val encOk = blobOkFile(instanceId, clientMessageId)
+    if (!readOkMarker(encOk, enc, 0L)) {
+        enc.delete()
+        encOk.delete()
+        cipherFile(instanceId, clientMessageId).delete()
+    }
+    val source = sourceFile(instanceId, clientMessageId)
+    val sourceOk = sourceOkFile(instanceId, clientMessageId)
+    if (source.isFile && !readOkMarker(sourceOk, source, 0L)) {
+        source.delete()
+        sourceOk.delete()
+    }
+}
+
+private class JvmOutboundFileInputStream(
+    private val input: InputStream,
+) : OutboundFileInputStream {
+    override suspend fun read(buffer: ByteArray, offset: Int, length: Int): Int =
+        withContext(Dispatchers.IO) {
+            input.read(buffer, offset, length)
+        }
+
+    override suspend fun close() {
+        withContext(Dispatchers.IO) {
+            input.close()
+        }
+    }
+}
+
+actual suspend fun openOutboundFileInputStream(fileUri: String): OutboundFileInputStream? =
+    withContext(Dispatchers.IO) {
+        val path = resolveLocalPath(fileUri) ?: return@withContext null
+        val file = File(path)
+        if (!file.isFile) return@withContext null
+        JvmOutboundFileInputStream(FileInputStream(file))
+    }
+
+actual suspend fun readOutboundFileBytes(fileUri: String): ByteArray =
+    withContext(Dispatchers.IO) {
+        val path = resolveLocalPath(fileUri) ?: throw OutboundFileUnavailableException("Invalid file URI")
+        val file = File(path)
+        if (!file.isFile) throw OutboundFileUnavailableException("File no longer exists")
+        file.readBytes()
+    }
+
+actual suspend fun copyOutboundFileToPath(sourceUri: String, destinationPath: String) {
+    withContext(Dispatchers.IO) {
+        val dest = File(destinationPath)
+        dest.parentFile?.mkdirs()
+        val path = resolveLocalPath(sourceUri)
+            ?: throw OutboundFileUnavailableException("Invalid file URI")
+        val source = File(path)
+        if (!source.isFile) throw OutboundFileUnavailableException("Failed to read file from URI")
+        source.inputStream().use { inputStream ->
+            FileOutputStream(dest).use { output ->
+                inputStream.copyTo(output)
+                output.flush()
+                output.fd.sync()
+            }
+        }
+    }
+}
+
+actual suspend fun saveEncryptedUploadBlob(instanceId: String, clientMessageId: String, bytes: ByteArray) {
+    withContext(Dispatchers.IO) {
+        repairInterruptedUploadArtifacts(instanceId, clientMessageId)
+        val part = blobPartFile(instanceId, clientMessageId)
+        part.delete()
+        blobOkFile(instanceId, clientMessageId).delete()
+        FileOutputStream(part).use { it.write(bytes) }
+        part.syncOutput()
+    }
+}
+
+actual suspend fun loadEncryptedUploadBlob(instanceId: String, clientMessageId: String): ByteArray? =
+    withContext(Dispatchers.IO) {
+        if (!isEncryptedBlobReady(instanceId, clientMessageId, null)) return@withContext null
+        val f = blobFile(instanceId, clientMessageId)
+        if (!f.isFile || f.length() == 0L) null else f.readBytes()
+    }
+
+actual suspend fun encryptedUploadBlobSizeBytes(instanceId: String, clientMessageId: String): Long? =
+    withContext(Dispatchers.IO) {
+        if (!isEncryptedBlobReady(instanceId, clientMessageId, null)) return@withContext null
+        val f = blobFile(instanceId, clientMessageId)
+        if (!f.isFile || f.length() <= 0L) null else f.length()
+    }
+
+actual suspend fun readEncryptedUploadBlobRange(
+    instanceId: String,
+    clientMessageId: String,
+    offset: Long,
+    length: Int,
+): ByteArray = withContext(Dispatchers.IO) {
+    if (!isEncryptedBlobReady(instanceId, clientMessageId, null)) {
+        throw OutboundFileUnavailableException("Encrypted upload blob not committed")
+    }
+    val f = blobFile(instanceId, clientMessageId)
+    if (!f.isFile) throw OutboundFileUnavailableException("Encrypted upload blob missing")
+    if (length <= 0) return@withContext ByteArray(0)
+    f.inputStream().use { input ->
+        val skipped = input.skip(offset)
+        if (skipped < offset) throw OutboundFileUnavailableException("Encrypted upload blob truncated")
+        val buffer = ByteArray(length)
+        var read = 0
+        while (read < length) {
+            val n = input.read(buffer, read, length - read)
+            if (n <= 0) break
+            read += n
+        }
+        if (read < length) {
+            throw OutboundFileUnavailableException("Encrypted upload blob truncated")
+        }
+        buffer
+    }
+}
+
+actual suspend fun saveUploadTransportCipherJson(instanceId: String, clientMessageId: String, json: String) {
+    saveUploadTransportCipherJsonAtomic(instanceId, clientMessageId, json)
+}
+
+actual suspend fun saveUploadTransportCipherJsonAtomic(
+    instanceId: String,
+    clientMessageId: String,
+    json: String,
+) {
+    withContext(Dispatchers.IO) {
+        val part = cipherPartFile(instanceId, clientMessageId)
+        val final = cipherFile(instanceId, clientMessageId)
+        part.writeText(json)
+        part.syncOutput()
+        atomicReplace(part, final)
+    }
+}
+
+actual suspend fun loadUploadTransportCipherJson(instanceId: String, clientMessageId: String): String? =
+    withContext(Dispatchers.IO) {
+        if (!cipherFile(instanceId, clientMessageId).isFile) return@withContext null
+        cipherFile(instanceId, clientMessageId).readText().takeIf { it.isNotBlank() }
+    }
+
+actual suspend fun clearUploadArtifacts(instanceId: String, clientMessageId: String) {
+    withContext(Dispatchers.IO) {
+        sourceFile(instanceId, clientMessageId).delete()
+        sourcePartFile(instanceId, clientMessageId).delete()
+        sourceOkFile(instanceId, clientMessageId).delete()
+        blobFile(instanceId, clientMessageId).delete()
+        blobPartFile(instanceId, clientMessageId).delete()
+        blobOkFile(instanceId, clientMessageId).delete()
+        cipherFile(instanceId, clientMessageId).delete()
+        cipherPartFile(instanceId, clientMessageId).delete()
+    }
+}
+
+actual suspend fun clearUploadSecretsOnly(instanceId: String, clientMessageId: String) {
+    withContext(Dispatchers.IO) {
+        blobFile(instanceId, clientMessageId).delete()
+        blobPartFile(instanceId, clientMessageId).delete()
+        blobOkFile(instanceId, clientMessageId).delete()
+        cipherFile(instanceId, clientMessageId).delete()
+        cipherPartFile(instanceId, clientMessageId).delete()
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/db/MessageDatabaseLock.jvm.kt

@@ -0,0 +1,6 @@
+package ru.fromchat.api.local.db
+
+internal actual fun <T> withMessageDatabaseLock(block: () -> T): T =
+    synchronized(MessageDatabaseLock) { block() }
+
+private object MessageDatabaseLock

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/db/store/MessageDatabaseDriver.jvm.kt

@@ -0,0 +1,23 @@
+package ru.fromchat.api.local.db.store
+
+import app.cash.sqldelight.db.SqlDriver
+import app.cash.sqldelight.driver.jdbc.sqlite.JdbcSqliteDriver
+import java.io.File
+import ru.fromchat.db.MessageDatabase
+
+actual fun provideMessageDatabaseDriver(): SqlDriver {
+    val home = System.getProperty("user.home")
+    val dir = if (!home.isNullOrBlank()) {
+        File(home, ".fromchat/cache/fromchat")
+    } else {
+        File(System.getProperty("java.io.tmpdir"), "fromchat")
+    }
+    dir.mkdirs()
+    val dbFile = File(dir, "message_database.db")
+    val needsCreate = !dbFile.exists()
+    val driver = JdbcSqliteDriver("jdbc:sqlite:${dbFile.absolutePath}")
+    if (needsCreate) {
+        MessageDatabase.Schema.create(driver)
+    }
+    return driver
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/download/AttachmentDownloadForeground.jvm.kt

@@ -0,0 +1,9 @@
+package ru.fromchat.api.local.download
+
+actual object AttachmentDownloadForeground {
+    actual fun onFileDownloadStarted(storageKey: String) = Unit
+
+    actual fun onFileDownloadProgress(percent: Int, displayLabel: String?) = Unit
+
+    actual fun onFileDownloadFinished(storageKey: String) = Unit
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/download/DmFileDownloader.jvm.kt

@@ -0,0 +1,24 @@
+package ru.fromchat.api.local.download
+
+import java.awt.Desktop
+import java.io.File
+import java.net.URI
+
+actual suspend fun openCachedAttachmentFile(
+    cacheUri: String,
+    mimeType: String,
+    displayFilename: String?,
+): Boolean {
+    return runCatching {
+        if (!Desktop.isDesktopSupported()) return false
+        val desktop = Desktop.getDesktop()
+        if (!desktop.isSupported(Desktop.Action.OPEN)) return false
+        when {
+            cacheUri.startsWith("file:") -> desktop.open(File(URI(cacheUri)))
+            cacheUri.startsWith("http://") || cacheUri.startsWith("https://") ->
+                desktop.browse(URI(cacheUri))
+            else -> desktop.open(File(cacheUri))
+        }
+        true
+    }.getOrDefault(false)
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/download/EncryptedFileDownloader.jvm.kt

@@ -0,0 +1,15 @@
+package ru.fromchat.api.local.download
+
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.cio.CIO
+import io.ktor.client.plugins.HttpTimeout
+import io.ktor.client.plugins.HttpTimeoutConfig
+
+internal actual fun encryptedDownloadHttpClient(): HttpClient =
+    HttpClient(CIO) {
+        install(HttpTimeout) {
+            connectTimeoutMillis = 15_000
+            requestTimeoutMillis = HttpTimeoutConfig.INFINITE_TIMEOUT_MS
+            socketTimeoutMillis = HttpTimeoutConfig.INFINITE_TIMEOUT_MS
+        }
+    }

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/download/LocalDecodedImageCache.jvm.kt

@@ -0,0 +1,54 @@
+package ru.fromchat.api.local.download
+
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.toComposeImageBitmap
+import java.io.File
+import org.jetbrains.skia.Bitmap
+import org.jetbrains.skia.Image
+import org.jetbrains.skia.ImageInfo
+import org.jetbrains.skia.SamplingMode
+
+actual object PlatformDecodedBitmapCache {
+    private val cache = mutableMapOf<String, ImageBitmap>()
+
+    actual fun get(key: String): ImageBitmap? = cache[key]
+
+    actual fun put(key: String, bitmap: ImageBitmap) {
+        cache[key] = bitmap
+    }
+
+    actual fun remove(key: String) {
+        cache.remove(key)
+    }
+
+    actual fun evictPrefix(prefix: String) {
+        cache.keys.filter { it.startsWith(prefix) }.forEach { cache.remove(it) }
+    }
+}
+
+actual fun decodeLocalImageFile(absolutePath: String, reqWidthPx: Int, reqHeightPx: Int): ImageBitmap? {
+    val bytes = runCatching { File(absolutePath).readBytes() }.getOrNull() ?: return null
+    return decodeImageBytes(bytes, reqWidthPx, reqHeightPx)
+}
+
+actual fun decodeImageBytes(bytes: ByteArray, reqWidthPx: Int, reqHeightPx: Int): ImageBitmap? =
+    runCatching {
+        val image = Image.makeFromEncoded(bytes) ?: return@runCatching null
+        scaleSkiaImageToFitWithin(image, reqWidthPx, reqHeightPx)
+    }.getOrNull()
+
+private fun scaleSkiaImageToFitWithin(image: Image, reqWidthPx: Int, reqHeightPx: Int): ImageBitmap {
+    if (image.width <= reqWidthPx && image.height <= reqHeightPx) return image.toComposeImageBitmap()
+    val scale = minOf(
+        reqWidthPx.toFloat() / image.width.toFloat(),
+        reqHeightPx.toFloat() / image.height.toFloat(),
+    )
+    if (scale >= 1f) return image.toComposeImageBitmap()
+    val dstW = (image.width * scale).toInt().coerceAtLeast(1)
+    val dstH = (image.height * scale).toInt().coerceAtLeast(1)
+    val dst = Bitmap()
+    dst.allocPixels(ImageInfo.makeN32Premul(dstW, dstH))
+    val pixmap = dst.peekPixels() ?: return image.toComposeImageBitmap()
+    image.scalePixels(pixmap, SamplingMode.LINEAR, true)
+    return Image.makeFromBitmap(dst).toComposeImageBitmap()
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/download/LocalImageFileDimensions.jvm.kt

@@ -0,0 +1,17 @@
+package ru.fromchat.api.local.download
+
+import java.io.ByteArrayInputStream
+import java.io.File
+import javax.imageio.ImageIO
+
+internal actual fun readLocalImageDimensions(absolutePath: String): Pair<Int, Int>? =
+    runCatching {
+        val image = ImageIO.read(File(absolutePath)) ?: return null
+        image.width to image.height
+    }.getOrNull()
+
+internal actual fun readImageDimensionsFromBytes(data: ByteArray): Pair<Int, Int>? =
+    runCatching {
+        val image = ImageIO.read(ByteArrayInputStream(data)) ?: return null
+        image.width to image.height
+    }.getOrNull()

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/download/MessageFileSave.jvm.kt

@@ -0,0 +1,45 @@
+package ru.fromchat.api.local.download
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import java.io.File
+import javax.swing.JFileChooser
+import kotlinx.coroutines.launch
+import ru.fromchat.api.local.cache.DecryptedFileCache
+import ru.fromchat.api.local.cache.PendingFileSaveEntry
+import ru.fromchat.api.local.cache.PendingFileSaveRegistry
+
+@Composable
+actual fun rememberPlatformSaveMessageFile(
+    onComplete: (Boolean) -> Unit,
+): (SavableMessageFile) -> Unit {
+    val scope = rememberCoroutineScope()
+    return remember(onComplete) {
+        { savable: SavableMessageFile ->
+            scope.launch {
+                val chooser = JFileChooser().apply {
+                    dialogType = JFileChooser.SAVE_DIALOG
+                    selectedFile = File(savable.filename)
+                }
+                if (chooser.showSaveDialog(null) != JFileChooser.APPROVE_OPTION) {
+                    onComplete(false)
+                    return@launch
+                }
+                PendingFileSaveRegistry.schedule(
+                    PendingFileSaveEntry(
+                        storageKey = savable.storageKey,
+                        destinationUri = chooser.selectedFile.absolutePath,
+                        filename = savable.filename,
+                        mimeType = savable.mimeType,
+                    ),
+                )
+                DecryptedFileCache.getCached(
+                    messageId = DownloadedFileRegistry.messageIdFromStorageKey(savable.storageKey) ?: -1,
+                    fileIndex = DownloadedFileRegistry.fileIndexFromStorageKey(savable.storageKey) ?: 0,
+                )
+                onComplete(true)
+            }
+        }
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/download/MessageImageSave.jvm.kt

@@ -0,0 +1,29 @@
+package ru.fromchat.api.local.download
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import java.io.File
+import javax.swing.JFileChooser
+
+@Composable
+actual fun rememberPlatformSaveMessageImage(
+    onComplete: (Boolean) -> Unit,
+): (SavableMessageImage, ByteArray) -> Unit {
+    return remember(onComplete) {
+        { savable: SavableMessageImage, bytes: ByteArray ->
+            val chooser = JFileChooser().apply {
+                dialogType = JFileChooser.SAVE_DIALOG
+                selectedFile = File(savable.filename)
+            }
+            if (chooser.showSaveDialog(null) != JFileChooser.APPROVE_OPTION) {
+                onComplete(false)
+                return@remember
+            }
+            val ok = runCatching {
+                chooser.selectedFile.writeBytes(bytes)
+                true
+            }.getOrDefault(false)
+            onComplete(ok)
+        }
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/send/OutboxProcessor.jvm.kt

@@ -0,0 +1,13 @@
+package ru.fromchat.api.local.send
+
+import kotlinx.coroutines.MainScope
+import kotlinx.coroutines.launch
+
+actual fun scheduleOutboxProcessing(instanceId: String) {
+    if (instanceId.trim().isEmpty()) return
+    MainScope().launch {
+        OutgoingMessageCoordinator.drainActiveInstanceOutbox()
+    }
+}
+
+actual fun cancelOutboxProcessing(instanceId: String) = Unit

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/workers/AttachmentFileCopyForeground.jvm.kt

@@ -0,0 +1,6 @@
+package ru.fromchat.api.local.workers
+
+actual object AttachmentFileCopyForeground {
+    actual fun onCopyStarted(storageKey: String, displayLabel: String?) = Unit
+    actual fun onCopyFinished(storageKey: String) = Unit
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/api/local/workers/AttachmentUploadQueue.jvm.kt

@@ -0,0 +1,15 @@
+package ru.fromchat.api.local.workers
+
+import kotlinx.coroutines.flow.SharedFlow
+import ru.fromchat.api.local.cache.CacheContext
+import ru.fromchat.api.local.send.scheduleOutboxProcessing
+
+actual object AttachmentUploadQueue {
+    actual val progressFlow: SharedFlow<AttachmentUploadProgress> = AttachmentUploadNotifier.progressFlow
+
+    actual fun enqueue(job: AttachmentUploadJob) {
+        scheduleOutboxProcessing(CacheContext.activeInstanceId.value.trim())
+    }
+
+    actual fun cancel(jobId: String) = Unit
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/desktop/DesktopAutostart.kt

@@ -0,0 +1,186 @@
+package ru.fromchat.desktop
+
+import java.io.File
+import java.nio.charset.StandardCharsets
+import java.util.prefs.Preferences
+import ru.fromchat.Logger
+
+/**
+ * Best-effort login/autostart helpers. Call from settings UI later.
+ * macOS: LaunchAgent plist; Windows: HKCU Run; Linux: XDG autostart `.desktop`.
+ */
+object DesktopAutostart {
+    private const val TAG = "DesktopAutostart"
+    private const val PREF_NODE = "ru/fromchat/desktop"
+    private const val PREF_ENABLED = "autostart_enabled"
+    private const val WINDOWS_RUN_KEY =
+        "Software\\Microsoft\\Windows\\CurrentVersion\\Run"
+    private const val APP_NAME = "FromChat"
+
+    fun isSupported(): Boolean {
+        val os = System.getProperty("os.name").orEmpty().lowercase()
+        return os.contains("mac") || os.contains("win") || os.contains("linux")
+    }
+
+    fun isEnabled(): Boolean =
+        preferences().getBoolean(PREF_ENABLED, false) && probeOsEnabled()
+
+    fun setEnabled(enabled: Boolean): Boolean {
+        val ok = runCatching {
+            when {
+                isMac() -> setMacLaunchAgent(enabled)
+                isWindows() -> setWindowsRunKey(enabled)
+                isLinux() -> setLinuxDesktopEntry(enabled)
+                else -> false
+            }
+        }.getOrElse {
+            Logger.w(TAG, "setEnabled($enabled) failed: ${it.message}", it)
+            false
+        }
+        if (ok) preferences().putBoolean(PREF_ENABLED, enabled)
+        return ok
+    }
+
+    private fun preferences(): Preferences =
+        Preferences.userRoot().node(PREF_NODE)
+
+    private fun probeOsEnabled(): Boolean = runCatching {
+        when {
+            isMac() -> launchAgentFile().isFile
+            isWindows() -> windowsRunValue() != null
+            isLinux() -> linuxDesktopFile().isFile
+            else -> false
+        }
+    }.getOrDefault(false)
+
+    private fun isMac(): Boolean =
+        System.getProperty("os.name").orEmpty().lowercase().contains("mac")
+
+    private fun isWindows(): Boolean =
+        System.getProperty("os.name").orEmpty().lowercase().contains("win")
+
+    private fun isLinux(): Boolean =
+        System.getProperty("os.name").orEmpty().lowercase().contains("linux")
+
+    private fun currentExecutableCommand(): String? {
+        val command = ProcessHandle.current().info().command().orElse(null) ?: return null
+        val args = ProcessHandle.current().info().arguments().orElse(emptyArray())
+        return buildString {
+            append(quoteIfNeeded(command))
+            for (arg in args) {
+                append(' ')
+                append(quoteIfNeeded(arg))
+            }
+        }
+    }
+
+    private fun quoteIfNeeded(value: String): String =
+        if (value.any { it.isWhitespace() || it == '"' }) {
+            "\"" + value.replace("\"", "\\\"") + "\""
+        } else {
+            value
+        }
+
+    private fun launchAgentFile(): File =
+        File(
+            System.getProperty("user.home"),
+            "Library/LaunchAgents/ru.fromchat.desktop.plist",
+        )
+
+    private fun setMacLaunchAgent(enabled: Boolean): Boolean {
+        val plist = launchAgentFile()
+        if (!enabled) {
+            runCatching {
+                ProcessBuilder("launchctl", "unload", plist.absolutePath)
+                    .redirectErrorStream(true)
+                    .start()
+                    .waitFor()
+            }
+            return plist.delete() || !plist.exists()
+        }
+        val command = currentExecutableCommand() ?: return false
+        val programArgs = command
+            .split(Regex(" (?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)"))
+            .joinToString("\n") { "    <string>${it.trim('"').xmlEscape()}</string>" }
+        plist.parentFile?.mkdirs()
+        plist.writeText(
+            """
+            |<?xml version="1.0" encoding="UTF-8"?>
+            |<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+            |<plist version="1.0">
+            |<dict>
+            |  <key>Label</key>
+            |  <string>ru.fromchat.desktop</string>
+            |  <key>ProgramArguments</key>
+            |  <array>
+            |$programArgs
+            |  </array>
+            |  <key>RunAtLoad</key>
+            |  <true/>
+            |</dict>
+            |</plist>
+            """.trimMargin(),
+            StandardCharsets.UTF_8,
+        )
+        ProcessBuilder("launchctl", "load", plist.absolutePath)
+            .redirectErrorStream(true)
+            .start()
+            .waitFor()
+        return plist.isFile
+    }
+
+    private fun setWindowsRunKey(enabled: Boolean): Boolean {
+        val command = currentExecutableCommand() ?: return false
+        return if (enabled) {
+            ProcessBuilder(
+                "reg", "add", "HKCU\\$WINDOWS_RUN_KEY",
+                "/v", APP_NAME, "/t", "REG_SZ", "/d", command, "/f",
+            ).redirectErrorStream(true).start().waitFor() == 0
+        } else {
+            ProcessBuilder(
+                "reg", "delete", "HKCU\\$WINDOWS_RUN_KEY",
+                "/v", APP_NAME, "/f",
+            ).redirectErrorStream(true).start().waitFor().let { it == 0 || it == 1 }
+        }
+    }
+
+    private fun windowsRunValue(): String? {
+        val process = ProcessBuilder(
+            "reg", "query", "HKCU\\$WINDOWS_RUN_KEY", "/v", APP_NAME,
+        ).redirectErrorStream(true).start()
+        val output = process.inputStream.bufferedReader().readText()
+        if (process.waitFor() != 0) return null
+        val line = output.lineSequence().firstOrNull { it.contains(APP_NAME) } ?: return null
+        return line.substringAfter("REG_SZ").trim().ifEmpty { null }
+    }
+
+    private fun linuxDesktopFile(): File =
+        File(System.getProperty("user.home"), ".config/autostart/fromchat.desktop")
+
+    private fun setLinuxDesktopEntry(enabled: Boolean): Boolean {
+        val file = linuxDesktopFile()
+        if (!enabled) return file.delete() || !file.exists()
+        val command = currentExecutableCommand() ?: return false
+        file.parentFile?.mkdirs()
+        file.writeText(
+            """
+            |[Desktop Entry]
+            |Type=Application
+            |Version=1.0
+            |Name=$APP_NAME
+            |Comment=FromChat desktop
+            |Exec=$command
+            |X-GNOME-Autostart-enabled=true
+            |Terminal=false
+            """.trimMargin(),
+            StandardCharsets.UTF_8,
+        )
+        return file.isFile
+    }
+
+    private fun String.xmlEscape(): String =
+        replace("&", "&amp;")
+            .replace("<", "&lt;")
+            .replace(">", "&gt;")
+            .replace("\"", "&quot;")
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/desktop/DesktopDeepLinkBus.kt

@@ -0,0 +1,48 @@
+package ru.fromchat.desktop
+
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import ru.fromchat.Logger
+import ru.fromchat.auth.yandex.YANDEX_OAUTH_REDIRECT_URI
+
+/**
+ * Receives `fromchat://` URIs from the desktop process (startup args, second-instance
+ * IPC, or OS protocol launch) and fans them out to listeners (OAuth, future profile).
+ */
+object DesktopDeepLinkBus {
+    private const val TAG = "DesktopDeepLink"
+
+    private val _links = MutableSharedFlow<String>(
+        extraBufferCapacity = 16,
+        onBufferOverflow = BufferOverflow.DROP_OLDEST,
+    )
+    val links: SharedFlow<String> = _links.asSharedFlow()
+
+    private val _oauthRedirects = MutableSharedFlow<String>(
+        extraBufferCapacity = 8,
+        onBufferOverflow = BufferOverflow.DROP_OLDEST,
+    )
+    val oauthRedirects: SharedFlow<String> = _oauthRedirects.asSharedFlow()
+
+    fun handleUri(uri: String) {
+        val trimmed = uri.trim()
+        if (trimmed.isEmpty()) return
+        Logger.i(TAG, "handleUri ${shortUri(trimmed)}")
+        _links.tryEmit(trimmed)
+        if (isYandexOAuthRedirect(trimmed)) {
+            _oauthRedirects.tryEmit(trimmed)
+        }
+    }
+
+    fun isFromChatUri(uri: String): Boolean =
+        uri.trim().startsWith("fromchat://", ignoreCase = true)
+
+    private fun isYandexOAuthRedirect(uri: String): Boolean =
+        uri.startsWith(YANDEX_OAUTH_REDIRECT_URI, ignoreCase = true) ||
+            uri.startsWith("fromchat://oauth/yandex?", ignoreCase = true)
+
+    private fun shortUri(uri: String): String =
+        if (uri.length <= 120) uri else uri.take(117) + "..."
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/desktop/DesktopNotifier.kt

@@ -0,0 +1,37 @@
+package ru.fromchat.desktop
+
+import java.awt.SystemTray
+import java.awt.TrayIcon
+import ru.fromchat.Logger
+
+/**
+ * Best-effort desktop notifications. [Main] may install a Compose Tray sink;
+ * otherwise falls back to AWT [SystemTray] when available.
+ */
+object DesktopNotifier {
+    private const val TAG = "DesktopNotifier"
+
+    @Volatile
+    var sink: ((title: String, body: String) -> Unit)? = null
+
+    fun show(title: String, body: String) {
+        val t = title.trim().ifEmpty { "FromChat" }
+        val b = body.trim()
+        sink?.invoke(t, b)?.let { return }
+        showAwtBalloon(t, b)
+    }
+
+    private fun showAwtBalloon(title: String, body: String) {
+        runCatching {
+            if (!SystemTray.isSupported()) {
+                Logger.d(TAG, "SystemTray unsupported; drop notification")
+                return
+            }
+            val tray = SystemTray.getSystemTray()
+            val icon = tray.trayIcons.firstOrNull() ?: return
+            icon.displayMessage(title, body, TrayIcon.MessageType.INFO)
+        }.onFailure {
+            Logger.w(TAG, "AWT balloon failed: ${it.message}", it)
+        }
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/legal/LegalMarkdown.jvm.kt

@@ -0,0 +1,18 @@
+package ru.fromchat.legal
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalUriHandler
+
+@Composable
+actual fun Markdown(
+    content: String,
+    modifier: Modifier,
+) {
+    val uriHandler = LocalUriHandler.current
+    MarkdownPlain(
+        content = content,
+        modifier = modifier,
+        onLinkClick = { uriHandler.openUri(it) },
+    )
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/logging/GzipCompress.jvm.kt

@@ -0,0 +1,10 @@
+package ru.fromchat.logging
+
+import java.io.ByteArrayOutputStream
+import java.util.zip.GZIPOutputStream
+
+internal actual fun gzipCompress(input: ByteArray): ByteArray {
+    val output = ByteArrayOutputStream(input.size)
+    GZIPOutputStream(output).use { gzip -> gzip.write(input) }
+    return output.toByteArray()
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/logging/LogFileOps.jvm.kt

@@ -0,0 +1,96 @@
+package ru.fromchat.logging
+
+import java.io.ByteArrayOutputStream
+import java.io.File
+import java.io.FileInputStream
+import java.util.zip.GZIPInputStream
+import java.util.zip.GZIPOutputStream
+import java.util.zip.ZipEntry
+import java.util.zip.ZipOutputStream
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+internal actual object LogFileOps {
+    actual fun readText(path: String): String {
+        val file = File(path)
+        if (!file.isFile) return ""
+        return runCatching { file.readText() }.getOrDefault("")
+    }
+
+    actual fun readBytes(path: String): ByteArray {
+        val file = File(path)
+        if (!file.isFile) return ByteArray(0)
+        return runCatching { file.readBytes() }.getOrDefault(ByteArray(0))
+    }
+
+    actual suspend fun gzipFile(sourcePath: String, destinationPath: String) = withContext(Dispatchers.IO) {
+        val source = File(sourcePath)
+        if (!source.isFile) return@withContext
+        val dest = File(destinationPath)
+        dest.parentFile?.mkdirs()
+        FileInputStream(source).use { input ->
+            GZIPOutputStream(dest.outputStream()).use { gzip ->
+                input.copyTo(gzip)
+            }
+        }
+        source.delete()
+    }
+
+    actual suspend fun readGzipText(path: String, onProgress: (Float) -> Unit): String =
+        withContext(Dispatchers.IO) {
+            gunzipToByteArray(path, onProgress).decodeToString()
+        }
+
+    actual suspend fun gunzipToFile(
+        sourcePath: String,
+        destinationPath: String,
+        onProgress: (Float) -> Unit,
+    ) = withContext(Dispatchers.IO) {
+        val bytes = gunzipToByteArray(sourcePath, onProgress)
+        val dest = File(destinationPath)
+        dest.parentFile?.mkdirs()
+        dest.writeBytes(bytes)
+    }
+
+    actual suspend fun zipFiles(
+        entries: List<Pair<String, String>>,
+        destinationPath: String,
+    ) = withContext(Dispatchers.IO) {
+        if (entries.isEmpty()) return@withContext
+        val dest = File(destinationPath)
+        dest.parentFile?.mkdirs()
+        ZipOutputStream(dest.outputStream()).use { zip ->
+            entries.forEach { (entryName, sourcePath) ->
+                val source = File(sourcePath)
+                if (!source.isFile) return@forEach
+                zip.putNextEntry(ZipEntry(entryName))
+                FileInputStream(source).use { input -> input.copyTo(zip) }
+                zip.closeEntry()
+            }
+        }
+    }
+
+    private fun gunzipToByteArray(path: String, onProgress: (Float) -> Unit): ByteArray {
+        val file = File(path)
+        if (!file.isFile) {
+            onProgress(1f)
+            return ByteArray(0)
+        }
+        val total = file.length().coerceAtLeast(1L)
+        val output = ByteArrayOutputStream()
+        FileInputStream(file).use { input ->
+            GZIPInputStream(input).use { gzip ->
+                val buffer = ByteArray(8_192)
+                var read: Int
+                var consumed = 0L
+                while (gzip.read(buffer).also { read = it } != -1) {
+                    output.write(buffer, 0, read)
+                    consumed = (consumed + read).coerceAtMost(total)
+                    onProgress((consumed.toFloat() / total).coerceIn(0f, 1f))
+                }
+            }
+        }
+        onProgress(1f)
+        return output.toByteArray()
+    }
+}

app/shared/src/jvmMain/kotlin/ru/fromchat/logging/LogShare.jvm.kt

@@ -0,0 +1,23 @@
+package ru.fromchat.logging
+
+import java.awt.Desktop
+import java.awt.Toolkit
+import java.awt.datatransfer.StringSelection
+import java.io.File
+
+actual object LogShare {
+    actual fun shareText(title: String, text: String) {
+        Toolkit.getDefaultToolkit().systemClipboard.setContents(StringSelection(text), null)
+        println("LogShare: copied text to clipboard ($title)")
+    }
+
+    actual fun shareFile(title: String, filePath: String, mimeType: String) {
+        runCatching {
+            if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.OPEN)) {
+                Desktop.getDesktop().open(File(filePath))
+            } else {
+                println("LogShare: file at $filePath ($title, $mimeType)")
+            }
+        }
+    }
+}