custom emojis

.idea/studiobot.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="StudioBotProjectSettings">
+    <option name="shareContext" value="OptedIn" />
+  </component>
+</project>

AGENTS.md

@@ -5,8 +5,8 @@
 Fluffytrix is an Android Matrix chat client with a Discord-like UI. Built with Kotlin, targeting Android 14+ (minSdk 34, targetSdk 36, compileSdk 36).
 
 **Package**: `com.example.fluffytrix`  
-**Build system**: Gradle with Kotlin DSL, version catalog at `gradle/libs.versions.toml`  
+**Build system**: Gradle with KotlinDSL, version catalog at `gradle/libs.versions.toml`  
-**Container/DI**: Koin  
+**DI**: Koin  
 **State management**: Jetpack Compose StateFlow, ViewModel  
 **UI framework**: Jetpack Compose with Material 3 (Dynamic Colors)  
 **Protocol**: Trixnity SDK for Matrix  
@@ -20,28 +20,22 @@ Fluffytrix is an Android Matrix chat client with a Discord-like UI. Built with K
 ```bash
 ./gradlew assembleDebug          # Build debug APK (minified for performance)
 ./gradlew assembleRelease        # Build release APK
-./gradlew test                   # Run unit tests
+./gradlew test                   # Run all unit tests
-./gradlew connectedAndroidTest   # Run instrumented tests on device/emulator
+./gradlew connectedAndroidTest   # Run instrumented tests on device
-./gradlew testDebugUnitTest --tests "com.example.fluffytrix.ExampleUnitTest"  # Run single test
+./gradlew testDebugUnitTest --tests "com.example.fluffytrix.*"  # Run single test class
+./gradlew app:testDebugUnitTest --tests "LoginViewModelTest"  # Run specific test
 ```
 
-**Notes**:
+- Debug builds use R8 with `isDebuggable = true` for balanced speed/debuggability
-- Debug builds use R8 with `isDebuggable = true` but strip material-icons-extended and optimize Compose for performance
-- Use `--tests` with Gradle test tasks to run a single test class
 - Instrumented tests require a connected device or emulator
 
 ---
 
 ## Testing
 
-**Unit tests**: Located in `app/src/test/java/`, run with `./gradlew test`  
+**Unit tests**: `app/src/test/java/`  
-**Instrumented tests**: Located in `app/src/androidTest/java/`, run with `./gradlew connectedAndroidTest`
+**Instrumented tests**: `app/src/androidTest/java/`  
-
+**Single test**: `./gradlew testDebugUnitTest --tests "com.example.fluffytrix.ui.main.LoginViewModelTest"`
-**Single test execution**:
-```bash
-./gradlew testDebugUnitTest --tests "com.example.fluffytrix.*"
-./gradlew app:testDebugUnitTest --tests "ExampleUnitTest"
-```
 
 ---
 
@@ -49,17 +43,17 @@ Fluffytrix is an Android Matrix chat client with a Discord-like UI. Built with K
 
 ### Kotlin Conventions
 
-- **Android Official Kotlin style** (`kotlin.code.style=official` in gradle.properties)
+- **Android Official Kotlin style** (`kotlin.code.style=official`)
 - File naming: `PascalCase.kt` (e.g., `MainViewModel.kt`)
-- Class naming: `PascalCase` (e.g., `MainViewModel`, `AuthRepository`)
+- Class naming: `PascalCase` (e.g., `AuthRepository`, `MainViewModel`)
 - Function/property naming: `camelCase` (e.g., `sendMessage`, `selectedChannel`)
-- Constant naming: `PascalCase` for top-level constants
+- Constants: `PascalCase` for top-level constants
 - **Never use underscores in variable names**
 
 ### Imports
 
-- Explicit imports only (no wildcard imports)
+- Explicit imports only (no wildcards)
-- Group imports: Android/X → Kotlin → Javax/Java → Third-party → Same package
+- Group: Android/X → Kotlin → Javax/Java → Third-party → Same package
 - Example:
   ```kotlin
   import android.os.Bundle
@@ -69,59 +63,37 @@ Fluffytrix is an Android Matrix chat client with a Discord-like UI. Built with K
   import com.example.fluffytrix.ui.theme.FluffytrixTheme
   ```
 
-### Types
+### Types & Error Handling
 
 - Prefer `val` over `var` (immutable data)
-- Use `StateFlow<T>` for observable state in ViewModels
+- Use `StateFlow<T>` for observable ViewModel state, `Flow<T>` for read-only streams
-- Use `Flow<T>` for read-only data streams
+- Use `suspend` for async operations, `Result<T>` for failing operations
-- Use `suspend` functions for async operations
+- `try-catch` with `catch (_: Exception) { }` for graceful degradation in ViewModels
-- Use `Result<T>` for operations that can fail
+- Use `?:` operators when appropriate, **never crash on recoverable errors**
 
-### Error Handling
+### Compose & ViewModels
 
-- Prefer `try-catch` with silent failure or `?` operators where appropriate
+- Use `@Composable` for all UI functions; use `MaterialTheme` for consistent theming
-- In ViewModels, use `catch (_: Exception) { }` or `?:` for graceful degradation
+- Discord-like layout: space sidebar → channel list → message area → member list
-- Expose error state via `StateFlow<AuthState>` where users need feedback
+- Use `Modifier.padding()`, `wrapContentWidth()`, `fillMaxWidth()` appropriately
-- **Never crash the app on recoverable errors**
+- Inject deps via constructor with Koin; use `viewModelScope` for coroutines
+- Cache expensive operations (e.g., `messageCache`, `memberCache`)
 
-### Compose UI
+### Coroutines & Data Layer
 
-- Use `@Composable` for all UI functions
+- `Dispatchers.Default` for CPU work, `Dispatchers.IO` for I/O operations
-- Follow Discord-like layout: space sidebar → channel list → message area → member list
+- Cancel jobs on ViewModel cleanup: `job?.cancel()`
-- Use `MaterialTheme` for consistent theming
+- Use `Room` for persistent storage; `DataStore Preferences` for small key-value data
-- Prefer `Modifier.padding()` over nested `Box` with margins
+- Prefer Flow-based APIs; cache in ViewModels
-- Use `wrapContentWidth()` and `fillMaxWidth()` appropriately
-- For columnar layouts: `Column(horizontalAlignment = Alignment.CenterHorizontally, verticalArrangement = Arrangement.spacedBy(12.dp))`
-
-### ViewModels
-
-- Inject dependencies via constructor (Koin)
-- Use `viewModelScope` for coroutines
-- Expose state via `StateFlow` (e.g., `val messages: StateFlow<List<MessageItem>>`)
-- Use `MutableStateFlow` for internal state, expose as read-only `StateFlow`
-
-### Coroutines
-
-- Use `Dispatchers.Default` for CPU-intensive work (parsing, filtering)
-- Use `Dispatchers.IO` for file/network operations
-- Always cancel jobs on ViewModel cleanup: `job?.cancel()`
-- Use `withContext(Dispatchers.Default)` to switch threads explicitly
-
-### Data Layer
-
-- Use Room for persistent storage (Trixnity uses Room internally)
-- Use DataStore Preferences for small key-value data
-- Prefer Flow-based APIs for reactive data streams
-- Cache expensive operations in ViewModel (e.g., `messageCache`, `memberCache`)
 
 ### Naming Conventions
 
-- State Flow properties: `_name` (private) / `name` (public)
+- State Flow: `_state` (private) / `state` (public)
-- Repository class: `AuthService`, `AuthRepository`
+- Repositories: `AuthRepository`, `MessageRepository`  
-- ViewModel class: `MainViewModel`, `LoginViewModel`
+- ViewModels: `MainViewModel`, `LoginViewModel`
-- UI composable: `MainScreen`, `ChannelList`, `MessageItem`
+- UI composables: `MainScreen`, `ChannelList`, `MessageItem`
-- Model data class: `MessageItem`, `ChannelItem`, `SpaceItem`
+- Models: `MessageItem`, `ChannelItem`, `SpaceItem`
-- Use `full` property for Matrix IDs (e.g., `userId.full`, `roomId.full`)
+- Matrix IDs: Use `RoomId`, `UserId` types; access `.full` for strings
 
 ---
 
@@ -130,62 +102,19 @@ Fluffytrix is an Android Matrix chat client with a Discord-like UI. Built with K
 **Layered Architecture**:
 ```
 ui/          — ViewModels, Screens, Navigation
-data/        — Repositories, local storage, models
+data/        — Repositories, storage, models
 di/          — Koin modules
-ui/theme/    — Material 3 Theme (colors, typography)
+ui/theme/    — Material 3 Theme
 ```
 
-**Dependency Injection**: Koin with two modules:
+**Koin DI**: 
-- `appModule`: ViewModels (`viewModel { MainViewModel(...) }`)
+- `appModule`: ViewModel injection
-- `dataModule`: singleton services (`single { AuthRepository(...) }`)
+- `dataModule`: Singleton repositories/UI Flow: NavHost in `MainActivity` with `FluffytrixTheme`, ViewModels expose StateFlow, screens observe with `collectAsState()`
-
-**UI Flow**:
-1. `FluffytrixNavigation` handles nav graph and session restoration
-2. `MainActivity` hosts the NavHost with `FluffytrixTheme`
-3. ViewModels expose state via StateFlow
-4. Screens observe state with `collectAsState()`
 
 ---
 
-## Key Dependencies (from libs.versions.toml)
+## Key Dependencies
 
-- **Compose BOM**: `2025.06.00`
+- **Compose BOM**: `2025.06.00`, **Kotlin**: `2.2.10`, **AGP**: `9.0.1`
-- **Kotlin**: `2.2.10`
+- **Koin**: `4.1.1`, **Trixnity**: `4.22.7`, **Ktor**: `3.3.0`
-- **AGP**: `9.0.1`
+- **Coroutines**: `1.10.2`, **DataStore**: `1.1.7`, **Coil**: `3.2.0`
-- **Koin**: `4.1.1`
-- **Trixnity**: `4.22.7`
-- **Ktor**: `3.3.0`
-- **Coroutines**: `1.10.2`
-- **DataStore**: `1.1.7`
-- **Coil**: `3.2.0`
-- **Media3**: `1.6.0`
-
----
-
-## Special Notes
-
-1. **Matrix IDs**: Use `RoomId`, `UserId` types from Trixnity; access `.full` for string representation
-
-2. **MXC URLs**: Convert with `MxcUrlHelper.mxcToDownloadUrl()` and `mxcToThumbnailUrl()`
-
-3. **Build Performance**: Debug builds use R8 minification with `isDebuggable = true` to balance speed and debuggability
-
-4. **Channel Reordering**: Channel order is saved per-space in DataStore and restored on navigation
-
-5. **Encrypted Rooms**: Handle decryption state—messages may appear as `Unable to decrypt` until keys arrive
-
-6. **Theme**: Material 3 with Discord-inspired color scheme (primary: `#5865F2`)
-
----
-
-## Running Lint/Checks
-
-```bash
-./gradlew lintDebug
-./gradlew spotlessCheck
-```
-
-## CI/CD
-
-- All builds use Gradle wrapper (`./gradlew`)
-- No manual Gradle installation required (project uses Gradle 9.1.0)

app/build.gradle.kts

@@ -101,6 +101,9 @@ dependencies {
     implementation(libs.markdown.renderer.code)
     implementation(libs.markdown.renderer.coil3)
 
+    // Jetpack Emoji Picker
+    implementation(libs.emoji.picker)
+
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)

app/src/main/java/com/example/fluffytrix/data/model/EmojiPack.kt

@@ -0,0 +1,45 @@
+package com.example.fluffytrix.data.model
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class CustomEmoji(
+    val url: String,
+    val body: String? = null,
+    val usage: List<String> = listOf("emoticon"),
+)
+
+@Serializable
+data class EmojiPackInfo(
+    @SerialName("display_name") val displayName: String? = null,
+    @SerialName("avatar_url") val avatarUrl: String? = null,
+)
+
+@Serializable
+data class EmojiPackData(
+    val pack: EmojiPackInfo = EmojiPackInfo(),
+    val images: Map<String, CustomEmoji> = emptyMap(),
+)
+
+@Serializable
+data class UserEmojiAccountData(
+    val packs: Map<String, EmojiPackData> = emptyMap(),
+)
+
+// UI-facing (resolved URLs)
+data class EmojiEntry(
+    val shortcode: String,
+    val mxcUrl: String,
+    val displayName: String,
+    val resolvedUrl: String,
+)
+
+data class EmojiPack(
+    val packId: String,
+    val displayName: String,
+    val avatarMxcUrl: String?,
+    val emojis: List<EmojiEntry>,
+    val isRoomPack: Boolean = false,
+    val roomId: String? = null,
+)

app/src/main/java/com/example/fluffytrix/data/repository/EmojiPackRepository.kt

@@ -0,0 +1,85 @@
+package com.example.fluffytrix.data.repository
+
+import com.example.fluffytrix.data.MxcUrlHelper
+import com.example.fluffytrix.data.model.CustomEmoji
+import com.example.fluffytrix.data.model.EmojiEntry
+import com.example.fluffytrix.data.model.EmojiPack
+import com.example.fluffytrix.data.model.EmojiPackData
+import com.example.fluffytrix.data.model.EmojiPackInfo
+import com.example.fluffytrix.data.model.UserEmojiAccountData
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+
+private val json = Json { ignoreUnknownKeys = true }
+
+class EmojiPackRepository(
+    private val authRepository: AuthRepository,
+) {
+    private val baseUrl: String
+        get() = try {
+            authRepository.getClient()?.session()?.homeserverUrl?.trimEnd('/') ?: ""
+        } catch (_: Exception) { "" }
+
+    suspend fun loadUserPacks(): List<EmojiPack> {
+        val client = authRepository.getClient() ?: return emptyList()
+        return try {
+            val raw = client.accountData("im.ponies.user_emojis") ?: return emptyList()
+            val data = json.decodeFromString<UserEmojiAccountData>(raw)
+            data.packs.map { (packId, packData) ->
+                packData.toEmojiPack(packId, baseUrl)
+            }
+        } catch (e: Exception) {
+            android.util.Log.e("EmojiPackRepo", "Failed to load user packs", e)
+            emptyList()
+        }
+    }
+
+    suspend fun saveUserPacks(packs: List<EmojiPack>) {
+        val client = authRepository.getClient() ?: return
+        try {
+            val packsMap = packs.associate { pack ->
+                pack.packId to EmojiPackData(
+                    pack = EmojiPackInfo(displayName = pack.displayName, avatarUrl = pack.avatarMxcUrl),
+                    images = pack.emojis.associate { entry ->
+                        entry.shortcode to CustomEmoji(url = entry.mxcUrl, body = entry.displayName.ifBlank { null })
+                    },
+                )
+            }
+            val data = UserEmojiAccountData(packs = packsMap)
+            client.setAccountData("im.ponies.user_emojis", json.encodeToString(data))
+        } catch (e: Exception) {
+            android.util.Log.e("EmojiPackRepo", "Failed to save user packs", e)
+        }
+    }
+
+    suspend fun uploadImage(mimeType: String, data: ByteArray): String? {
+        val client = authRepository.getClient() ?: return null
+        return try {
+            client.uploadMedia(mimeType, data, null)
+        } catch (e: Exception) {
+            android.util.Log.e("EmojiPackRepo", "Failed to upload emoji image", e)
+            null
+        }
+    }
+
+    suspend fun loadAllPacks(roomId: String? = null): List<EmojiPack> {
+        return loadUserPacks()
+    }
+}
+
+private fun EmojiPackData.toEmojiPack(packId: String, baseUrl: String): EmojiPack {
+    val emojis = images.map { (shortcode, emoji) ->
+        EmojiEntry(
+            shortcode = shortcode,
+            mxcUrl = emoji.url,
+            displayName = emoji.body ?: shortcode,
+            resolvedUrl = MxcUrlHelper.mxcToDownloadUrl(baseUrl, emoji.url) ?: emoji.url,
+        )
+    }
+    return EmojiPack(
+        packId = packId,
+        displayName = pack.displayName ?: packId,
+        avatarMxcUrl = pack.avatarUrl,
+        emojis = emojis,
+    )
+}

app/src/main/java/com/example/fluffytrix/di/AppModule.kt

@@ -3,6 +3,7 @@ package com.example.fluffytrix.di
 import android.app.Application
 import com.example.fluffytrix.data.local.PreferencesManager
 import com.example.fluffytrix.data.repository.AuthRepository
+import com.example.fluffytrix.data.repository.EmojiPackRepository
 import com.example.fluffytrix.ui.screens.login.LoginViewModel
 import com.example.fluffytrix.ui.screens.main.MainViewModel
 import com.example.fluffytrix.ui.screens.verification.VerificationViewModel
@@ -11,7 +12,7 @@ import org.koin.core.module.dsl.viewModel
 import org.koin.dsl.module
 
 val appModule = module {
-    viewModel { MainViewModel(androidApplication(), get(), get()) }
+    viewModel { MainViewModel(androidApplication(), get(), get(), get()) }
     viewModel { LoginViewModel(get()) }
     viewModel { VerificationViewModel(get()) }
 }
@@ -19,4 +20,5 @@ val appModule = module {
 val dataModule = module {
     single { PreferencesManager(get()) }
     single { AuthRepository(get(), get()) }
+    single { EmojiPackRepository(get()) }
 }

app/src/main/java/com/example/fluffytrix/ui/navigation/FluffytrixNavigation.kt

@@ -27,6 +27,9 @@ import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
 import com.example.fluffytrix.data.local.PreferencesManager
 import com.example.fluffytrix.data.repository.AuthRepository
+import androidx.navigation.NavType
+import androidx.navigation.navArgument
+import com.example.fluffytrix.ui.screens.emoji.EmojiPackManagementScreen
 import com.example.fluffytrix.ui.screens.login.LoginScreen
 import com.example.fluffytrix.ui.screens.main.MainScreen
 import com.example.fluffytrix.ui.screens.settings.SettingsScreen
@@ -148,6 +151,19 @@ fun FluffytrixNavigation() {
                 onSettingsClick = {
                     navController.navigate(Screen.Settings.route)
                 },
+                onEmojiPackManagement = { roomId ->
+                    navController.navigate(Screen.EmojiPackManagement.route(roomId))
+                },
+            )
+        }
+        composable(
+            route = Screen.EmojiPackManagement.routeWithArgs,
+            arguments = listOf(navArgument("roomId") { type = NavType.StringType; nullable = true; defaultValue = null }),
+        ) { backStackEntry ->
+            val roomId = backStackEntry.arguments?.getString("roomId")
+            EmojiPackManagementScreen(
+                roomId = roomId,
+                onBack = { navController.popBackStack() },
             )
         }
         composable(Screen.Settings.route) {

app/src/main/java/com/example/fluffytrix/ui/navigation/Screen.kt

@@ -5,4 +5,8 @@ sealed class Screen(val route: String) {
     data object Verification : Screen("verification")
     data object Main : Screen("main")
     data object Settings : Screen("settings")
+    data object EmojiPackManagement : Screen("emoji_packs") {
+        fun route(roomId: String? = null) = if (roomId != null) "emoji_packs?roomId=$roomId" else "emoji_packs"
+        const val routeWithArgs = "emoji_packs?roomId={roomId}"
+    }
 }

app/src/main/java/com/example/fluffytrix/ui/screens/emoji/EmojiPackManagementScreen.kt

@@ -0,0 +1,379 @@
+package com.example.fluffytrix.ui.screens.emoji
+
+import android.net.Uri
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExtendedFloatingActionButton
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Dialog
+import androidx.compose.ui.window.DialogProperties
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import coil3.compose.AsyncImage
+import com.example.fluffytrix.data.model.EmojiEntry
+import com.example.fluffytrix.data.model.EmojiPack
+import com.example.fluffytrix.ui.screens.main.MainViewModel
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import org.koin.androidx.compose.koinViewModel
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun EmojiPackManagementScreen(
+    roomId: String?,
+    onBack: () -> Unit,
+    viewModel: MainViewModel = koinViewModel(),
+) {
+    val emojiPacks by viewModel.emojiPacks.collectAsStateWithLifecycle()
+    val userPacks = emojiPacks.filter { !it.isRoomPack }
+    var showCreateDialog by remember { mutableStateOf(false) }
+    var editingPack by remember { mutableStateOf<EmojiPack?>(null) }
+
+    if (showCreateDialog) {
+        CreatePackDialog(
+            onDismiss = { showCreateDialog = false },
+            onCreate = { name ->
+                val newPack = EmojiPack(
+                    packId = name.lowercase().replace(Regex("[^a-z0-9_]"), "_"),
+                    displayName = name,
+                    avatarMxcUrl = null,
+                    emojis = emptyList(),
+                )
+                val updated = userPacks + newPack
+                viewModel.saveUserEmojiPacks(updated)
+                showCreateDialog = false
+            },
+        )
+    }
+
+    editingPack?.let { pack ->
+        EditPackDialog(
+            pack = pack,
+            viewModel = viewModel,
+            onDismiss = { editingPack = null },
+            onSave = { updatedPack ->
+                val updated = userPacks.map { if (it.packId == updatedPack.packId) updatedPack else it }
+                viewModel.saveUserEmojiPacks(updated)
+                editingPack = null
+            },
+        )
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Emoji Packs") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, "Back")
+                    }
+                },
+            )
+        },
+        floatingActionButton = {
+            ExtendedFloatingActionButton(
+                onClick = { showCreateDialog = true },
+                icon = { Icon(Icons.Default.Add, null) },
+                text = { Text("Create Pack") },
+            )
+        },
+    ) { padding ->
+        if (userPacks.isEmpty()) {
+            Box(
+                modifier = Modifier.fillMaxSize().padding(padding),
+                contentAlignment = Alignment.Center,
+            ) {
+                Text(
+                    "No emoji packs yet. Create one to get started.",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        } else {
+            LazyColumn(
+                modifier = Modifier.fillMaxSize().padding(padding),
+                contentPadding = PaddingValues(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                items(userPacks, key = { it.packId }) { pack ->
+                    PackRow(
+                        pack = pack,
+                        onEdit = { editingPack = pack },
+                        onDelete = {
+                            val updated = userPacks.filter { it.packId != pack.packId }
+                            viewModel.saveUserEmojiPacks(updated)
+                        },
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun PackRow(
+    pack: EmojiPack,
+    onEdit: () -> Unit,
+    onDelete: () -> Unit,
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onEdit() }
+            .padding(8.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        if (pack.avatarMxcUrl != null) {
+            AsyncImage(
+                model = pack.avatarMxcUrl,
+                contentDescription = null,
+                modifier = Modifier.size(40.dp).clip(CircleShape),
+                contentScale = ContentScale.Crop,
+            )
+        } else {
+            Box(
+                modifier = Modifier.size(40.dp).clip(CircleShape)
+                    .then(Modifier.fillMaxWidth()),
+                contentAlignment = Alignment.Center,
+            ) {
+                Text(
+                    pack.displayName.take(1).uppercase(),
+                    style = MaterialTheme.typography.titleMedium,
+                    fontWeight = FontWeight.Bold,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+            }
+        }
+        Spacer(Modifier.width(12.dp))
+        Column(modifier = Modifier.weight(1f)) {
+            Text(pack.displayName, style = MaterialTheme.typography.bodyLarge, fontWeight = FontWeight.Medium)
+            Text("${pack.emojis.size} emojis", style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+        IconButton(onClick = onDelete) {
+            Icon(Icons.Default.Delete, "Delete", tint = MaterialTheme.colorScheme.error)
+        }
+    }
+}
+
+@Composable
+private fun CreatePackDialog(onDismiss: () -> Unit, onCreate: (String) -> Unit) {
+    var name by remember { mutableStateOf("") }
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Create Emoji Pack") },
+        text = {
+            OutlinedTextField(
+                value = name,
+                onValueChange = { name = it },
+                label = { Text("Pack name") },
+                singleLine = true,
+            )
+        },
+        confirmButton = {
+            TextButton(onClick = { if (name.isNotBlank()) onCreate(name.trim()) }, enabled = name.isNotBlank()) {
+                Text("Create")
+            }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text("Cancel") }
+        },
+    )
+}
+
+@Composable
+private fun EditPackDialog(
+    pack: EmojiPack,
+    viewModel: MainViewModel,
+    onDismiss: () -> Unit,
+    onSave: (EmojiPack) -> Unit,
+) {
+    var emojis by remember { mutableStateOf(pack.emojis) }
+    var addShortcode by remember { mutableStateOf("") }
+    var pendingImageUri by remember { mutableStateOf<Uri?>(null) }
+    var isUploading by remember { mutableStateOf(false) }
+    val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+
+    val imagePicker = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+        if (uri != null) pendingImageUri = uri
+    }
+
+    // When we have a pending URI and a shortcode, prompt for shortcode first
+    if (pendingImageUri != null) {
+        AlertDialog(
+            onDismissRequest = { pendingImageUri = null },
+            title = { Text("Set Shortcode") },
+            text = {
+                OutlinedTextField(
+                    value = addShortcode,
+                    onValueChange = { addShortcode = it },
+                    label = { Text("Shortcode (e.g. blobcat)") },
+                    singleLine = true,
+                )
+            },
+            confirmButton = {
+                TextButton(
+                    onClick = {
+                        val uri = pendingImageUri ?: return@TextButton
+                        val code = addShortcode.trim().trimStart(':').trimEnd(':')
+                        if (code.isBlank()) return@TextButton
+                        isUploading = true
+                        scope.launch(Dispatchers.IO) {
+                            try {
+                                val bytes = context.contentResolver.openInputStream(uri)?.use { it.readBytes() }
+                                val mime = context.contentResolver.getType(uri) ?: "image/png"
+                                if (bytes != null) {
+                                    val mxcUrl = viewModel.uploadEmojiImage(mime, bytes)
+                                    if (mxcUrl != null) {
+                                        val entry = EmojiEntry(
+                                            shortcode = code,
+                                            mxcUrl = mxcUrl,
+                                            displayName = code,
+                                            resolvedUrl = mxcUrl,
+                                        )
+                                        withContext(Dispatchers.Main) {
+                                            emojis = emojis + entry
+                                        }
+                                    }
+                                }
+                            } finally {
+                                withContext(Dispatchers.Main) {
+                                    isUploading = false
+                                    pendingImageUri = null
+                                    addShortcode = ""
+                                }
+                            }
+                        }
+                    },
+                    enabled = addShortcode.isNotBlank() && !isUploading,
+                ) {
+                    Text(if (isUploading) "Uploading…" else "Add")
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { pendingImageUri = null; addShortcode = "" }) { Text("Cancel") }
+            },
+        )
+    }
+
+    Dialog(
+        onDismissRequest = onDismiss,
+        properties = DialogProperties(usePlatformDefaultWidth = false),
+    ) {
+        Scaffold(
+            topBar = {
+                @OptIn(ExperimentalMaterial3Api::class)
+                TopAppBar(
+                    title = { Text(pack.displayName) },
+                    navigationIcon = {
+                        IconButton(onClick = onDismiss) {
+                            Icon(Icons.AutoMirrored.Filled.ArrowBack, "Close")
+                        }
+                    },
+                    actions = {
+                        TextButton(onClick = { onSave(pack.copy(emojis = emojis)) }) {
+                            Text("Save")
+                        }
+                    },
+                )
+            },
+            floatingActionButton = {
+                ExtendedFloatingActionButton(
+                    onClick = { imagePicker.launch("image/*") },
+                    icon = { Icon(Icons.Default.Add, null) },
+                    text = { Text("Add Emoji") },
+                )
+            },
+        ) { padding ->
+            if (emojis.isEmpty()) {
+                Box(
+                    modifier = Modifier.fillMaxSize().padding(padding),
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Text("No emojis yet. Tap Add Emoji to upload one.", color = MaterialTheme.colorScheme.onSurfaceVariant)
+                }
+            } else {
+                LazyColumn(
+                    modifier = Modifier.fillMaxSize().padding(padding),
+                    contentPadding = PaddingValues(16.dp),
+                ) {
+                    items(emojis, key = { it.shortcode }) { entry ->
+                        EmojiEntryRow(
+                            entry = entry,
+                            onDelete = { emojis = emojis.filter { it.shortcode != entry.shortcode } },
+                        )
+                        HorizontalDivider()
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun EmojiEntryRow(entry: EmojiEntry, onDelete: () -> Unit) {
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 8.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        AsyncImage(
+            model = entry.resolvedUrl,
+            contentDescription = entry.shortcode,
+            modifier = Modifier.size(40.dp).clip(RoundedCornerShape(4.dp)),
+            contentScale = ContentScale.Fit,
+        )
+        Spacer(Modifier.width(12.dp))
+        Column(modifier = Modifier.weight(1f)) {
+            Text(":${entry.shortcode}:", style = MaterialTheme.typography.bodyMedium, fontWeight = FontWeight.Medium)
+            if (entry.displayName != entry.shortcode) {
+                Text(entry.displayName, style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+            }
+        }
+        IconButton(onClick = onDelete) {
+            Icon(Icons.Default.Delete, "Delete", tint = MaterialTheme.colorScheme.error)
+        }
+    }
+}

app/src/main/java/com/example/fluffytrix/ui/screens/main/MainScreen.kt

@@ -31,6 +31,7 @@ import org.koin.compose.koinInject
 fun MainScreen(
     onLogout: () -> Unit,
     onSettingsClick: () -> Unit = {},
+    onEmojiPackManagement: (String?) -> Unit = {},
     viewModel: MainViewModel = koinViewModel(),
 ) {
     val spaces by viewModel.spaces.collectAsStateWithLifecycle()
@@ -53,6 +54,7 @@ fun MainScreen(
     val currentUserId by viewModel.currentUserId.collectAsStateWithLifecycle()
     val replyingTo by viewModel.replyingTo.collectAsStateWithLifecycle()
     val editingMessage by viewModel.editingMessage.collectAsStateWithLifecycle()
+    val emojiPacks by viewModel.emojiPacks.collectAsStateWithLifecycle()
     val listState = viewModel.channelListState
     val preferencesManager: PreferencesManager = koinInject()
     val hideSpacesWhenClosed by preferencesManager.hideSpacesWhenClosed.collectAsStateWithLifecycle(initialValue = false)
@@ -142,6 +144,8 @@ fun MainScreen(
                     onEditThreadMessage = { eventId, body -> viewModel.editThreadMessage(eventId, body) },
                     onSendReaction = { eventId, emoji -> viewModel.sendReaction(eventId, emoji) },
                     onSendThreadReaction = { eventId, emoji -> viewModel.sendThreadReaction(eventId, emoji) },
+                    emojiPacks = emojiPacks,
+                    onOpenEmojiPackManagement = { onEmojiPackManagement(selectedChannel) },
                 )
 
                 AnimatedVisibility(visible = showMemberList) {

app/src/main/java/com/example/fluffytrix/ui/screens/main/MainViewModel.kt

@@ -11,7 +11,9 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.example.fluffytrix.data.MxcUrlHelper
 import com.example.fluffytrix.data.local.PreferencesManager
+import com.example.fluffytrix.data.model.EmojiPack
 import com.example.fluffytrix.data.repository.AuthRepository
+import com.example.fluffytrix.data.repository.EmojiPackRepository
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.async
@@ -42,6 +44,7 @@ import org.matrix.rustcomponents.sdk.TimelineListener
 import org.matrix.rustcomponents.sdk.UploadParameters
 import org.matrix.rustcomponents.sdk.UploadSource
 import org.json.JSONObject
+import org.matrix.rustcomponents.sdk.messageEventContentFromHtml
 import org.matrix.rustcomponents.sdk.messageEventContentFromMarkdown
 
 enum class UnreadStatus { NONE, UNREAD, MENTIONED }
@@ -61,8 +64,10 @@ data class ChannelItem(
     val unreadStatus: UnreadStatus = UnreadStatus.NONE,
 )
 
+data class InlineEmoji(val shortcode: String, val mxcUrl: String, val resolvedUrl: String)
+
 sealed interface MessageContent {
-    data class Text(val body: String, val urls: List<String> = emptyList()) : MessageContent
+    data class Text(val body: String, val urls: List<String> = emptyList(), val inlineEmojis: List<InlineEmoji> = emptyList()) : MessageContent
     data class Image(val body: String, val url: String, val width: Int? = null, val height: Int? = null) : MessageContent
     data class Gif(val body: String, val url: String, val width: Int? = null, val height: Int? = null) : MessageContent
     data class Video(val body: String, val url: String? = null, val thumbnailUrl: String? = null, val width: Int? = null, val height: Int? = null) : MessageContent
@@ -88,6 +93,7 @@ data class MessageItem(
     val timestamp: Long,
     val replyTo: ReplyInfo? = null,
     val threadRootEventId: String? = null,
+    val reactions: Map<String, List<String>> = emptyMap(), // emoji -> list of full Matrix user IDs
 )
 
 data class ThreadItem(
@@ -115,6 +121,7 @@ class MainViewModel(
     private val application: Application,
     private val authRepository: AuthRepository,
     private val preferencesManager: PreferencesManager,
+    private val emojiPackRepository: EmojiPackRepository,
 ) : ViewModel() {
 
     private val _spaces = MutableStateFlow<List<SpaceItem>>(emptyList())
@@ -195,6 +202,9 @@ class MainViewModel(
 
     private val _editingMessage = MutableStateFlow<MessageItem?>(null)
     val editingMessage: StateFlow<MessageItem?> = _editingMessage
+
+    private val _emojiPacks = MutableStateFlow<List<EmojiPack>>(emptyList())
+    val emojiPacks: StateFlow<List<EmojiPack>> = _emojiPacks
     private val _spaceChildrenMap = MutableStateFlow<Map<String, Set<String>>>(emptyMap())
 
     private val _channelSections = MutableStateFlow<List<ChannelSection>>(emptyList())
@@ -283,6 +293,7 @@ class MainViewModel(
             syncService = authRepository.getOrStartSync()
             try { _currentUserId.value = authRepository.getClient()?.userId() } catch (_: Exception) {}
             loadRooms()
+            loadEmojiPacks()
         }
         observeSelectedChannel()
         observeSpaceFiltering()
@@ -752,6 +763,12 @@ class MainViewModel(
         senderNameCache[localpart] = senderName
         if (senderAvatar != null) senderAvatarCache[localpart] = senderAvatar
 
+        val reactions = if (content is TimelineItemContent.MsgLike) {
+            content.content.reactions
+                .filter { it.senders.isNotEmpty() }
+                .associate { reaction -> reaction.key to reaction.senders.map { it.senderId } }
+        } else emptyMap()
+
         val msg = MessageItem(
             eventId = eventId,
             senderId = localpart,
@@ -761,6 +778,7 @@ class MainViewModel(
             timestamp = eventItem.timestamp.toLong(),
             replyTo = replyInfo,
             threadRootEventId = threadRootId,
+            reactions = reactions,
         )
 
         ids.add(eventId)
@@ -797,6 +815,7 @@ class MainViewModel(
                 MessageContent.Text(
                     body = text,
                     urls = urlRegex.findAll(text).map { it.value }.toList(),
+                    inlineEmojis = parseInlineEmojis(rawJson),
                 )
             }
             is MessageType.Notice -> {
@@ -804,10 +823,11 @@ class MainViewModel(
                 MessageContent.Text(
                     body = text,
                     urls = urlRegex.findAll(text).map { it.value }.toList(),
+                    inlineEmojis = parseInlineEmojis(rawJson),
                 )
             }
             is MessageType.Emote -> {
-                MessageContent.Text(body = "* ${msgType.content.body}")
+                MessageContent.Text(body = "* ${msgType.content.body}", inlineEmojis = parseInlineEmojis(rawJson))
             }
             is MessageType.Image -> {
                 val c = msgType.content
@@ -935,15 +955,66 @@ class MainViewModel(
         }
     }
 
+    fun loadEmojiPacks() {
+        viewModelScope.launch(Dispatchers.IO) {
+            _emojiPacks.value = emojiPackRepository.loadAllPacks(_selectedChannel.value)
+        }
+    }
+
+    fun saveUserEmojiPacks(packs: List<EmojiPack>) {
+        viewModelScope.launch(Dispatchers.IO) {
+            emojiPackRepository.saveUserPacks(packs)
+            loadEmojiPacks()
+        }
+    }
+
+    suspend fun uploadEmojiImage(mimeType: String, data: ByteArray): String? {
+        return emojiPackRepository.uploadImage(mimeType, data)
+    }
+
+    private fun parseInlineEmojis(rawJson: String?): List<InlineEmoji> {
+        rawJson ?: return emptyList()
+        return try {
+            val json = org.json.JSONObject(rawJson)
+            val formattedBody = json.optJSONObject("content")?.optString("formatted_body") ?: return emptyList()
+            val regex = Regex("""<img[^>]+data-mx-emoticon[^>]+src="(mxc://[^"]+)"[^>]+alt="([^"]+)"[^>]*/?>""")
+            val packs = _emojiPacks.value
+            regex.findAll(formattedBody).mapNotNull { match ->
+                val mxcUrl = match.groupValues[1]
+                val alt = match.groupValues[2]
+                val resolvedUrl = MxcUrlHelper.mxcToDownloadUrl(baseUrl, mxcUrl) ?: mxcUrl
+                InlineEmoji(shortcode = alt, mxcUrl = mxcUrl, resolvedUrl = resolvedUrl)
+            }.toList()
+        } catch (_: Exception) { emptyList() }
+    }
+
     fun sendMessage(body: String) {
         val timeline = activeTimeline ?: return
         viewModelScope.launch(Dispatchers.IO) {
             try {
-                timeline.send(messageEventContentFromMarkdown(body))
+                val content = buildMessageContent(body)
+                timeline.send(content)
             } catch (_: Exception) { }
         }
     }
 
+    private fun buildMessageContent(body: String): org.matrix.rustcomponents.sdk.RoomMessageEventContentWithoutRelation {
+        val packs = _emojiPacks.value
+        if (packs.isEmpty()) return messageEventContentFromMarkdown(body)
+        // Build a map of shortcode -> emoji entry across all packs
+        val emojiMap = packs.flatMap { it.emojis }.associateBy { ":${it.shortcode}:" }
+        val found = emojiMap.keys.filter { body.contains(it) }
+        if (found.isEmpty()) return messageEventContentFromMarkdown(body)
+        // Build formatted body with inline emoji img tags
+        var formattedBody = body
+        for (key in found) {
+            val entry = emojiMap[key] ?: continue
+            val imgTag = """<img data-mx-emoticon src="${entry.mxcUrl}" alt=":${entry.shortcode}:" height="32" />"""
+            formattedBody = formattedBody.replace(key, imgTag)
+        }
+        return messageEventContentFromHtml(body, formattedBody)
+    }
+
     fun sendFiles(uris: List<Uri>, caption: String?) {
         val timeline = activeTimeline ?: return
         viewModelScope.launch(Dispatchers.IO) {
@@ -1480,7 +1551,7 @@ class MainViewModel(
                 val threadTimeline = activeThreadTimeline ?: return@withLock
                 try {
                     // Thread-focused timeline sends automatically include the m.thread relation
-                    threadTimeline.send(messageEventContentFromMarkdown(body))
+                    threadTimeline.send(buildMessageContent(body))
                 } catch (e: Exception) {
                     android.util.Log.e("MainVM", "Failed to send thread message", e)
                 }

app/src/main/java/com/example/fluffytrix/ui/screens/main/components/MessageTimeline.kt

@@ -3,6 +3,7 @@ package com.example.fluffytrix.ui.screens.main.components
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
@@ -22,13 +23,15 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.Send
+import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.People
 import androidx.compose.material.icons.filled.Tag
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
 import androidx.compose.material3.TextField
 import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.runtime.Composable
@@ -50,6 +53,7 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.compose.material3.Text
 import android.net.Uri
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -67,17 +71,26 @@ import com.mikepenz.markdown.m3.markdownColor
 import com.mikepenz.markdown.m3.markdownTypography
 import com.mikepenz.markdown.coil3.Coil3ImageTransformerImpl
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.emoji2.emojipicker.EmojiPickerView
+import androidx.emoji2.emojipicker.EmojiViewItem
+import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
+import androidx.compose.foundation.lazy.grid.items
 import androidx.compose.material.icons.filled.AttachFile
 import androidx.compose.material.icons.filled.Check
 import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.EmojiEmotions
 import androidx.compose.material.icons.filled.KeyboardArrowDown
 import androidx.compose.material.icons.automirrored.filled.Reply
+import androidx.compose.material3.ScrollableTabRow
+import androidx.compose.material3.Tab
 import androidx.compose.material.icons.filled.PlayCircleFilled
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.compositionLocalOf
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.rememberUpdatedState
 import kotlinx.coroutines.launch
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.input.pointer.pointerInput
@@ -93,6 +106,9 @@ import androidx.media3.ui.PlayerView
 import com.example.fluffytrix.data.repository.AuthRepository
 import org.koin.compose.koinInject
 import coil3.compose.AsyncImage
+import com.example.fluffytrix.data.MxcUrlHelper
+import com.example.fluffytrix.data.model.EmojiPack
+import com.example.fluffytrix.ui.screens.main.InlineEmoji
 import com.example.fluffytrix.ui.screens.main.MessageContent
 import com.example.fluffytrix.ui.screens.main.MessageItem
 import com.example.fluffytrix.ui.screens.main.ReplyInfo
@@ -103,6 +119,8 @@ import java.util.Locale
 private val LocalImageViewer = compositionLocalOf<(String) -> Unit> { {} }
 private val LocalVideoPlayer = compositionLocalOf<(String) -> Unit> { {} }
 private val LocalScrollToEvent = compositionLocalOf<(String) -> Unit> { {} }
+private val LocalReactionHandler = compositionLocalOf<(eventId: String, emoji: String) -> Unit> { { _, _ -> } }
+private val LocalCurrentUserId = compositionLocalOf<String?> { null }
 
 private val senderColors = arrayOf(
     Color(0xFF5865F2),
@@ -159,6 +177,8 @@ fun MessageTimeline(
     onEditThreadMessage: (String, String) -> Unit = { _, _ -> },
     onSendReaction: (String, String) -> Unit = { _, _ -> },
     onSendThreadReaction: (String, String) -> Unit = { _, _ -> },
+    emojiPacks: List<EmojiPack> = emptyList(),
+    onOpenEmojiPackManagement: () -> Unit = {},
 ) {
     var fullscreenImageUrl by remember { mutableStateOf<String?>(null) }
     var fullscreenVideoUrl by remember { mutableStateOf<String?>(null) }
@@ -201,12 +221,22 @@ fun MessageTimeline(
                 onOpenThread(msg.eventId)
                 contextMenuMessage = null
             },
+            emojiPacks = emojiPacks,
         )
     }
 
+    val reactionHandler: (String, String) -> Unit = remember(selectedThread, onSendReaction, onSendThreadReaction) {
+        { eventId, emoji ->
+            if (selectedThread != null) onSendThreadReaction(eventId, emoji)
+            else onSendReaction(eventId, emoji)
+        }
+    }
+
     CompositionLocalProvider(
         LocalImageViewer provides { url -> fullscreenImageUrl = url },
         LocalVideoPlayer provides { url -> fullscreenVideoUrl = url },
+        LocalReactionHandler provides reactionHandler,
+        LocalCurrentUserId provides currentUserId,
     ) {
         Column(
             modifier = modifier
@@ -221,7 +251,7 @@ fun MessageTimeline(
                 if (selectedThread != null) {
                     ThreadTopBar(selectedThreadName ?: "Thread in #${channelName ?: selectedChannel}", onCloseThread)
                 } else {
-                    TopBar(channelName ?: selectedChannel, onToggleMemberList)
+                    TopBar(channelName ?: selectedChannel, onToggleMemberList, onOpenEmojiPackManagement)
                 }
                 HorizontalDivider(color = MaterialTheme.colorScheme.surfaceVariant)
             }
@@ -400,6 +430,7 @@ fun MessageTimeline(
                         if (selectedThread != null) onEditThreadMessage(eventId, body)
                         else onEditMessage(eventId, body)
                     },
+                    emojiPacks = emojiPacks,
                 )
             }
         }
@@ -407,7 +438,7 @@ fun MessageTimeline(
 }
 
 @Composable
-private fun TopBar(name: String, onToggleMemberList: () -> Unit) {
+private fun TopBar(name: String, onToggleMemberList: () -> Unit, onOpenEmojiPackManagement: () -> Unit = {}) {
     Row(
         modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 10.dp),
         verticalAlignment = Alignment.CenterVertically,
@@ -421,6 +452,9 @@ private fun TopBar(name: String, onToggleMemberList: () -> Unit) {
             color = MaterialTheme.colorScheme.onBackground,
             modifier = Modifier.weight(1f),
         )
+        IconButton(onClick = onOpenEmojiPackManagement) {
+            Icon(Icons.Default.EmojiEmotions, "Emoji packs", tint = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
         IconButton(onClick = onToggleMemberList) {
             Icon(Icons.Default.People, "Toggle member list", tint = MaterialTheme.colorScheme.onSurfaceVariant)
         }
@@ -447,6 +481,53 @@ private fun ThreadTopBar(title: String, onClose: () -> Unit) {
     }
 }
 
+@Composable
+private fun ReactionRow(eventId: String, reactions: Map<String, List<String>>) {
+    if (reactions.isEmpty()) return
+    val onReact = LocalReactionHandler.current
+    val currentUserId = LocalCurrentUserId.current
+    val authRepository: AuthRepository = koinInject()
+    val baseUrl = remember { try { authRepository.getClient()?.session()?.homeserverUrl?.trimEnd('/') ?: "" } catch (_: Exception) { "" } }
+    FlowRow(
+        horizontalArrangement = Arrangement.spacedBy(4.dp),
+        verticalArrangement = Arrangement.spacedBy(4.dp),
+        modifier = Modifier.padding(top = 4.dp),
+    ) {
+        reactions.forEach { (emoji, senders) ->
+            val isMine = currentUserId != null && senders.any { it == currentUserId }
+            Surface(
+                shape = RoundedCornerShape(12.dp),
+                color = if (isMine) MaterialTheme.colorScheme.primaryContainer
+                        else MaterialTheme.colorScheme.surfaceVariant,
+                modifier = Modifier.clickable { onReact(eventId, emoji) },
+            ) {
+                Row(
+                    modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.spacedBy(4.dp),
+                ) {
+                    if (emoji.startsWith("mxc://")) {
+                        val resolvedUrl = remember(emoji) { MxcUrlHelper.mxcToDownloadUrl(baseUrl, emoji) ?: emoji }
+                        AsyncImage(
+                            model = resolvedUrl,
+                            contentDescription = null,
+                            modifier = Modifier.size(18.dp),
+                        )
+                    } else {
+                        Text(emoji, fontSize = 14.sp)
+                    }
+                    Text(
+                        "${senders.size}",
+                        style = MaterialTheme.typography.labelSmall,
+                        color = if (isMine) MaterialTheme.colorScheme.onPrimaryContainer
+                                else MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
+}
+
 @Composable
 private fun FullMessage(message: MessageItem, onOpenThread: (String) -> Unit = {}, threadReplyCount: Int = 0, onLongPress: (MessageItem) -> Unit = {}) {
     val senderColor = remember(message.senderName) { colorForSender(message.senderName) }
@@ -488,6 +569,7 @@ private fun FullMessage(message: MessageItem, onOpenThread: (String) -> Unit = {
                 }
                 Spacer(Modifier.height(2.dp))
                 MessageContentView(message.content)
+                ReactionRow(message.eventId, message.reactions)
                 if (threadReplyCount > 0) {
                     Text(
                         text = "$threadReplyCount ${if (threadReplyCount == 1) "reply" else "replies"}",
@@ -511,7 +593,10 @@ private fun CompactMessage(message: MessageItem, onLongPress: (MessageItem) -> U
         }
         Row(modifier = Modifier.fillMaxWidth().padding(vertical = 1.dp)) {
             Spacer(Modifier.width(52.dp))
+            Column {
                 MessageContentView(message.content)
+                ReactionRow(message.eventId, message.reactions)
+            }
         }
     }
 }
@@ -619,6 +704,9 @@ private fun MessageContentView(content: MessageContent) {
 
 @Composable
 private fun TextContent(content: MessageContent.Text) {
+    if (content.inlineEmojis.isNotEmpty()) {
+        InlineEmojiText(content)
+    } else {
         Markdown(
             content = content.body,
             colors = markdownColor(
@@ -629,6 +717,42 @@ private fun TextContent(content: MessageContent.Text) {
             ),
             imageTransformer = Coil3ImageTransformerImpl,
         )
+    }
+}
+
+@Composable
+private fun InlineEmojiText(content: MessageContent.Text) {
+    val body = content.body
+    val emojis = content.inlineEmojis
+    // Build segments: split body on shortcode occurrences
+    FlowRow(verticalArrangement = Arrangement.Center) {
+        var remaining = body
+        for (emoji in emojis) {
+            val idx = remaining.indexOf(emoji.shortcode)
+            if (idx < 0) continue
+            val before = remaining.substring(0, idx)
+            if (before.isNotEmpty()) {
+                Text(
+                    before,
+                    style = MaterialTheme.typography.bodyMedium.copy(lineHeight = 20.sp),
+                    color = MaterialTheme.colorScheme.onBackground,
+                )
+            }
+            AsyncImage(
+                model = emoji.resolvedUrl,
+                contentDescription = emoji.shortcode,
+                modifier = Modifier.size(20.dp),
+            )
+            remaining = remaining.substring(idx + emoji.shortcode.length)
+        }
+        if (remaining.isNotEmpty()) {
+            Text(
+                remaining,
+                style = MaterialTheme.typography.bodyMedium.copy(lineHeight = 20.sp),
+                color = MaterialTheme.colorScheme.onBackground,
+            )
+        }
+    }
 }
 
 @Composable
@@ -892,9 +1016,11 @@ private fun MessageInput(
     editingMessage: MessageItem? = null,
     onSendReply: (String, String) -> Unit = { _, _ -> },
     onEditMessage: (String, String) -> Unit = { _, _ -> },
+    emojiPacks: List<EmojiPack> = emptyList(),
 ) {
     var text by remember { mutableStateOf("") }
     var attachedUris by remember { mutableStateOf(listOf<Uri>()) }
+    var showEmojiPackPicker by remember { mutableStateOf(false) }
 
     // Pre-fill text when entering edit mode
     androidx.compose.runtime.LaunchedEffect(editingMessage) {
@@ -912,7 +1038,108 @@ private fun MessageInput(
     }
     val canSend = text.isNotBlank() || attachedUris.isNotEmpty()
 
+    // Emoji picker dialog: custom packs first, then Unicode
+    if (showEmojiPackPicker) {
+        Dialog(
+            onDismissRequest = { showEmojiPackPicker = false },
+            properties = DialogProperties(usePlatformDefaultWidth = false),
+        ) {
+            Surface(
+                modifier = Modifier.fillMaxSize(),
+                color = MaterialTheme.colorScheme.surface,
+            ) {
+                Column(modifier = Modifier.fillMaxSize().padding(4.dp)) {
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        verticalAlignment = Alignment.CenterVertically,
+                    ) {
+                        IconButton(onClick = { showEmojiPackPicker = false }) {
+                            Icon(Icons.Default.Close, "Close", tint = MaterialTheme.colorScheme.onSurface)
+                        }
+                        Text(
+                            "Insert Emoji",
+                            style = MaterialTheme.typography.titleMedium,
+                            color = MaterialTheme.colorScheme.onSurface,
+                            modifier = Modifier.weight(1f),
+                        )
+                    }
+                    val tabs = emojiPacks.map { it.displayName } + "Unicode"
+                    var selectedTab by remember { mutableStateOf(0) }
+                    ScrollableTabRow(selectedTabIndex = selectedTab) {
+                        tabs.forEachIndexed { index, title ->
+                            Tab(
+                                selected = selectedTab == index,
+                                onClick = { selectedTab = index },
+                                text = { Text(title, maxLines = 1) },
+                            )
+                        }
+                    }
+                    if (selectedTab < emojiPacks.size) {
+                        CustomEmojiGrid(
+                            pack = emojiPacks[selectedTab],
+                            onEmojiSelected = { entry ->
+                                text = text + ":${entry.shortcode}:"
+                                showEmojiPackPicker = false
+                            },
+                            modifier = Modifier.fillMaxWidth().weight(1f),
+                        )
+                    } else {
+                        val currentText by rememberUpdatedState(text)
+                        AndroidView(
+                            factory = { ctx -> EmojiPickerView(ctx) },
+                            update = { view ->
+                                view.setOnEmojiPickedListener { emojiViewItem: EmojiViewItem ->
+                                    text = currentText + emojiViewItem.emoji
+                                    showEmojiPackPicker = false
+                                }
+                            },
+                            modifier = Modifier.fillMaxWidth().weight(1f),
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+    // Autocomplete strip: show matching emojis when text ends with :partialword (no space, no closing colon)
+    val autocompleteResults = remember(text, emojiPacks) {
+        if (emojiPacks.isEmpty()) return@remember emptyList()
+        val colonIdx = text.lastIndexOf(':')
+        if (colonIdx < 0) return@remember emptyList()
+        val partial = text.substring(colonIdx + 1)
+        if (partial.isEmpty() || partial.contains(' ') || partial.contains(':')) return@remember emptyList()
+        emojiPacks.flatMap { it.emojis }.filter { it.shortcode.contains(partial, ignoreCase = true) }.take(10)
+    }
+
     Column(modifier = Modifier.fillMaxWidth()) {
+        // Emoji autocomplete strip
+        if (autocompleteResults.isNotEmpty()) {
+            LazyRow(
+                modifier = Modifier.fillMaxWidth().padding(horizontal = 8.dp, vertical = 4.dp),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                items(autocompleteResults) { entry ->
+                    Column(
+                        modifier = Modifier
+                            .clickable {
+                                // Replace the partial :xxx with :shortcode:
+                                val colonIdx = text.lastIndexOf(':')
+                                text = text.substring(0, colonIdx) + ":${entry.shortcode}:"
+                            }
+                            .padding(4.dp),
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                    ) {
+                        AsyncImage(
+                            model = entry.resolvedUrl,
+                            contentDescription = entry.shortcode,
+                            modifier = Modifier.size(32.dp),
+                        )
+                        Text(entry.shortcode, style = MaterialTheme.typography.labelSmall, maxLines = 1)
+                    }
+                }
+            }
+            HorizontalDivider()
+        }
         // Attachment previews (Discord-style, above the text box)
         if (attachedUris.isNotEmpty()) {
             Row(
@@ -967,6 +1194,14 @@ private fun MessageInput(
                     tint = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
             }
+            if (emojiPacks.isNotEmpty()) {
+                IconButton(onClick = { showEmojiPackPicker = true }) {
+                    Icon(
+                        Icons.Default.EmojiEmotions, "Insert emoji",
+                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
             TextField(
                 value = text,
                 onValueChange = { text = it },
@@ -1027,30 +1262,139 @@ private fun MessageContextMenu(
     onReply: () -> Unit,
     onEdit: () -> Unit,
     onStartThread: () -> Unit,
+    emojiPacks: List<EmojiPack> = emptyList(),
 ) {
+    var showEmojiPicker by remember { mutableStateOf(false) }
+    val currentOnReact by rememberUpdatedState(onReact)
+
+    if (showEmojiPicker) {
+        Dialog(
+            onDismissRequest = { showEmojiPicker = false },
+            properties = DialogProperties(usePlatformDefaultWidth = false),
+        ) {
+            Surface(
+                modifier = Modifier.fillMaxSize(),
+                color = MaterialTheme.colorScheme.surface,
+            ) {
+                Column(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .padding(4.dp),
+                ) {
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        verticalAlignment = Alignment.CenterVertically,
+                        horizontalArrangement = Arrangement.spacedBy(8.dp),
+                    ) {
+                        IconButton(onClick = { showEmojiPicker = false }) {
+                            Icon(
+                                Icons.Default.Close,
+                                "Close picker",
+                                tint = MaterialTheme.colorScheme.onSurface,
+                            )
+                        }
+                        Text(
+                            "Choose an emoji",
+                            style = MaterialTheme.typography.titleMedium,
+                            color = MaterialTheme.colorScheme.onSurface,
+                            modifier = Modifier.weight(1f),
+                        )
+                    }
+                    if (emojiPacks.isNotEmpty()) {
+                        var selectedTab by remember { mutableStateOf(0) }
+                        val tabs = listOf("Unicode") + emojiPacks.map { it.displayName }
+                        ScrollableTabRow(selectedTabIndex = selectedTab) {
+                            tabs.forEachIndexed { index, title ->
+                                Tab(
+                                    selected = selectedTab == index,
+                                    onClick = { selectedTab = index },
+                                    text = { Text(title, maxLines = 1) },
+                                )
+                            }
+                        }
+                        when {
+                            selectedTab == 0 -> AndroidView(
+                                factory = { ctx -> EmojiPickerView(ctx) },
+                                update = { view ->
+                                    view.setOnEmojiPickedListener { emojiViewItem: EmojiViewItem ->
+                                        currentOnReact(emojiViewItem.emoji)
+                                        showEmojiPicker = false
+                                    }
+                                },
+                                modifier = Modifier.fillMaxWidth().weight(1f),
+                            )
+                            else -> {
+                                val pack = emojiPacks[selectedTab - 1]
+                                CustomEmojiGrid(
+                                    pack = pack,
+                                    onEmojiSelected = { entry ->
+                                        currentOnReact(entry.mxcUrl)
+                                        showEmojiPicker = false
+                                    },
+                                    modifier = Modifier.fillMaxWidth().weight(1f),
+                                )
+                            }
+                        }
+                    } else {
+                        Spacer(modifier = Modifier.height(8.dp))
+                        AndroidView(
+                            factory = { ctx -> EmojiPickerView(ctx) },
+                            update = { view ->
+                                view.setOnEmojiPickedListener { emojiViewItem: EmojiViewItem ->
+                                    currentOnReact(emojiViewItem.emoji)
+                                    showEmojiPicker = false
+                                }
+                            },
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .weight(1f),
+                        )
+                    }
+                }
+            }
+        }
+    }
+
     AlertDialog(
         onDismissRequest = onDismiss,
         title = null,
         text = {
             Column(verticalArrangement = Arrangement.spacedBy(0.dp)) {
-                // Quick emoji reactions
+                Row(
-                LazyRow(
+                    modifier = Modifier.fillMaxWidth(),
                     horizontalArrangement = Arrangement.spacedBy(4.dp),
-                    contentPadding = PaddingValues(vertical = 8.dp),
                 ) {
-                    items(QUICK_REACTIONS) { emoji ->
+                    QUICK_REACTIONS.forEach { emoji ->
                         Box(
                             modifier = Modifier
-                                .size(40.dp)
+                                .size(36.dp)
                                 .clip(CircleShape)
                                 .background(MaterialTheme.colorScheme.surfaceVariant)
                                 .clickable { onReact(emoji) },
                             contentAlignment = Alignment.Center,
                         ) {
-                            Text(emoji, fontSize = 20.sp)
+                            Text(emoji, fontSize = 18.sp)
                         }
                     }
                 }
+                Button(
+                    onClick = { showEmojiPicker = true },
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(48.dp),
+                    colors = ButtonDefaults.buttonColors(
+                        containerColor = MaterialTheme.colorScheme.primaryContainer,
+                        contentColor = MaterialTheme.colorScheme.onPrimaryContainer,
+                    ),
+                ) {
+                    Icon(
+                        Icons.Default.Add,
+                        "Add reaction",
+                        modifier = Modifier.size(20.dp),
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    Text("More emojis")
+                }
                 HorizontalDivider(modifier = Modifier.padding(vertical = 4.dp))
                 TextButton(
                     onClick = onReply,
@@ -1165,3 +1509,37 @@ private fun EditModeBar(body: String, onDismiss: () -> Unit) {
         }
     }
 }
+
+@Composable
+private fun CustomEmojiGrid(
+    pack: EmojiPack,
+    onEmojiSelected: (com.example.fluffytrix.data.model.EmojiEntry) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    LazyVerticalGrid(
+        columns = GridCells.Adaptive(56.dp),
+        modifier = modifier,
+        contentPadding = PaddingValues(8.dp),
+    ) {
+        items(pack.emojis) { entry ->
+            Column(
+                modifier = Modifier
+                    .clickable { onEmojiSelected(entry) }
+                    .padding(4.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                AsyncImage(
+                    model = entry.resolvedUrl,
+                    contentDescription = entry.shortcode,
+                    modifier = Modifier.size(40.dp),
+                )
+                Text(
+                    text = entry.shortcode,
+                    style = MaterialTheme.typography.labelSmall,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                )
+            }
+        }
+    }
+}

gradle/libs.versions.toml

@@ -19,6 +19,7 @@ matrixRustSdk = "26.02.19"
 coil = "3.2.0"
 media3 = "1.6.0"
 markdownRenderer = "0.37.0"
+emojiPicker = "1.6.0"
 kotlinxSerialization = "1.8.1"
 
 [libraries]
@@ -78,6 +79,9 @@ markdown-renderer-m3 = { group = "com.mikepenz", name = "multiplatform-markdown-
 markdown-renderer-code = { group = "com.mikepenz", name = "multiplatform-markdown-renderer-code-android", version.ref = "markdownRenderer" }
 markdown-renderer-coil3 = { group = "com.mikepenz", name = "multiplatform-markdown-renderer-coil3-android", version.ref = "markdownRenderer" }
 
+# Jetpack Emoji Picker
+emoji-picker = { group = "androidx.emoji2", name = "emoji2-emojipicker", version.ref = "emojiPicker" }
+
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }