Add chat UX improvements and fix DM naming sync

AGENTS.md

@@ -9,10 +9,13 @@ Progress log and architecture notes for AI agents working on this project.
 | Component | Status |
 |---|---|
 | Build infrastructure (Gradle, version catalog) | done |
+| NixOS CLI dev shell / Android SDK toolchain | done |
 | Matrix networking (Retrofit API + Session) | done |
 | SSO / password login flow | done |
 | Room list screen | done |
 | Chat screen (send + receive) | done |
+| E2EE via local Olm wrapper | done |
+| Device verification (SAS) | done |
 | Terminal theme (green on black, monospace) | done |
 | Launcher icon (vector adaptive) | done |
 | README | done |
@@ -24,6 +27,23 @@ Progress log and architecture notes for AI agents working on this project.
 ### No heavy Matrix SDK
 Instead of importing the full `matrix-android-sdk2` (used by Element), we call the Matrix REST API directly with Retrofit. This keeps the APK small and the code easy to follow. The trade-off is no E2E encryption support.
 
+### Local Olm build instead of Maven-native `olm-sdk`
+The upstream `org.matrix.android:olm-sdk` Maven artifact shipped a `libolm.so` that was only 4 KB ELF-aligned on arm64, which triggered Android's 16 KB page-size compatibility warning on modern devices. The app now vendors:
+- `app/libs/olm-sdk-3.2.16.jar`
+- `app/src/main/jniLibs/*/libolm.so`
+
+Those JNI binaries were rebuilt locally from the Matrix `olm` Android wrapper with linker flags that produce 16 KB-aligned `LOAD` segments on arm64.
+
+### Nix-first CLI builds
+The repo includes a `flake.nix` dev shell for NixOS. It provisions:
+- JDK 17
+- Gradle
+- Android SDK platforms 31 and 35
+- Build Tools 30.0.2, 34.0.0, and 35.0.0
+- Android NDK
+
+The shell rewrites `local.properties` on entry so CLI builds use the Nix-provided SDK path.
+
 ### SSO via Custom Tabs
 Login opens the homeserver's `/login/sso/redirect` endpoint in a Chrome Custom Tab. After auth the homeserver redirects to `matrixandroid://sso?loginToken=<token>`. The app intercepts this URI via an `<intent-filter>` in `AndroidManifest.xml` and exchanges the token for an access token.
 
@@ -33,6 +53,14 @@ Login opens the homeserver's `/login/sso/redirect` endpoint in a Chrome Custom T
 ### MatrixSession singleton
 `MatrixSession` is a process-scoped singleton (companion object). It holds the Retrofit client, persists the access token in `SharedPreferences`, and runs the `/sync` long-polling loop in a coroutine scope. All screens observe `syncState: StateFlow<SyncState>`.
 
+### Timeline is event-cache driven
+`MatrixSession` now keeps a per-room in-memory `RoomEvent` cache and rebuilds the visible `Message` list from those events. This allows:
+- local filtering/search over loaded events
+- message edits (`m.replace`)
+- reactions (`m.annotation`)
+- incremental history pagination
+- retrying decryption after keys arrive from another device
+
 ### Sync filter
 Initial and incremental syncs use a compact filter:
 - Timeline limited to 50 events per room
@@ -45,13 +73,14 @@ This prevents the first sync from being huge on accounts with many rooms.
 
 ## Known issues / future work
 
-- **E2E encryption**: Matrix Olm/Megolm is not implemented. Encrypted rooms will show blank messages.
+- **Olm is still legacy crypto**: The app uses a locally rebuilt Olm wrapper. Matrix has deprecated libolm in favor of vodozemac. A future migration should replace the current JNI/JAR setup.
+- **SAS verification edge case**: A handshake-ordering fix is currently in progress. The known symptom was that self-verification could fail depending on which device confirmed matching emojis first.
 - **Push notifications**: Not implemented. The app only receives messages while open.
-- **Pagination**: No scroll-back pagination for old messages.
+- **History is partial**: Pagination exists only while the room exposes a `prev_batch` token and only for message history. There is still no durable local database.
-- **Room member display names**: Members are shown as their MXID, not display name.
 - **Image/file messages**: Silently dropped (only `m.text` is rendered).
-- **Error handling**: Network errors on send are silently swallowed; add a snackbar or retry UI.
+- **Rich message support is partial**: Reactions and edits are handled for loaded events, but there is no reaction picker, no redactions, and no full relation aggregation from the homeserver.
-- **Direct messages**: DMs appear in the room list using the room ID; should resolve the other user's display name.
+- **Search is in-memory only**: Chat search only scans events already loaded into memory for the current room.
+- **Error handling**: Basic inline send/load errors are shown, but there is still no global offline state, retry queue, or structured error UX.
 
 ---
 
@@ -75,18 +104,27 @@ matrix-android/
 │       │   ├── navigation/AppNavigation.kt
 │       │   ├── auth/LoginScreen.kt
 │       │   ├── auth/LoginViewModel.kt
+│       │   ├── verification/VerificationScreen.kt
 │       │   ├── rooms/RoomListScreen.kt
 │       │   ├── chat/ChatScreen.kt
 │       │   ├── chat/ChatViewModel.kt
 │       │   ├── matrix/MatrixApi.kt
 │       │   ├── matrix/MatrixModels.kt
 │       │   ├── matrix/MatrixSession.kt
+│       │   ├── matrix/CryptoService.kt
+│       │   ├── matrix/VerificationService.kt
 │       │   └── ui/theme/Theme.kt
 │       └── res/
 │           ├── drawable/ic_launcher_foreground.xml
 │           ├── mipmap-anydpi-v26/ic_launcher.xml
 │           ├── mipmap-anydpi-v26/ic_launcher_round.xml
 │           └── values/{strings,colors,themes}.xml
+├── flake.nix
+├── flake.lock
+├── gradlew
+├── gradlew.bat
+├── app/libs/olm-sdk-3.2.16.jar
+├── app/src/main/jniLibs/
 ├── README.md
 └── AGENTS.md
 ```
@@ -104,3 +142,36 @@ matrix-android/
 - SSO flow: Custom Tabs → homeserver → `matrixandroid://sso` deep link → token exchange
 - Compose UI with monospace font, #00FF41 green, #0A0A0A background
 - All screens text-only, no images/icons/avatars
+
+## Session 2 — NixOS CLI + 16 KB Android compatibility (2026-05-16)
+
+- Added `flake.nix` + `flake.lock` for NixOS CLI builds
+- Generated and committed Gradle wrapper files
+- Discovered Android 16 KB compatibility warning on Pixel 7a
+- Confirmed APK ZIP alignment was already correct; root cause was Maven `libolm.so` being ELF-aligned to 4 KB
+- Cloned upstream Matrix `olm` Android wrapper, patched NDK build flags for 16 KB page size, and rebuilt `libolm.so`
+- Worked around old upstream Android wrapper assumptions:
+  - required platform 31 + build-tools 30.0.2
+  - required NDK path/layout adjustments
+  - required one small C++ compatibility fix in `olm::List` for modern clang/NDK
+- Replaced `implementation(libs.olm.sdk)` with:
+  - local `app/libs/olm-sdk-3.2.16.jar`
+  - local `app/src/main/jniLibs/*/libolm.so`
+- Validated final APK on-device:
+  - `libolm.so` inside the APK has `LOAD Align = 0x4000`
+  - APK installed and launched over ADB on the Pixel 7a
+
+## Session 3 — verification and chat UX expansion (2026-05-16, in progress)
+
+- Created checkpoint commit `0ede945` before feature work
+- Began fixing SAS verification handshake ordering
+- Added event-cache-backed message reconstruction in `MatrixSession`
+- Added local support for:
+  - in-room search over loaded messages
+  - message edits via `m.replace`
+  - reactions via `m.annotation`
+  - older-message pagination via `/rooms/{roomId}/messages`
+  - room-level encryption/history indicators
+  - inline chat error feedback
+- Added first-pass DM name resolution fallback via joined members lookup
+- This session is still dirty in the worktree; verify behavior before treating these changes as final

app/src/main/java/com/ltadeu6/matrix/auth/LoginScreen.kt

@@ -10,6 +10,7 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material3.Button
@@ -70,6 +71,7 @@ fun LoginScreen(
     Column(
         modifier = Modifier
             .fillMaxSize()
+            .statusBarsPadding()
             .padding(horizontal = 24.dp, vertical = 48.dp),
         verticalArrangement = Arrangement.Center,
         horizontalAlignment = Alignment.Start

app/src/main/java/com/ltadeu6/matrix/chat/ChatScreen.kt

@@ -1,5 +1,7 @@
 package com.ltadeu6.matrix.chat
 
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
@@ -17,14 +19,18 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.OutlinedTextFieldDefaults
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
@@ -41,6 +47,7 @@ import com.ltadeu6.matrix.ui.theme.MatrixGreen
 import com.ltadeu6.matrix.ui.theme.MatrixGreenDim
 import com.ltadeu6.matrix.ui.theme.TerminalFont
 
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
 fun ChatScreen(
     roomId: String,
@@ -55,11 +62,18 @@ fun ChatScreen(
 
     val messages by vm.messages.collectAsState()
     val roomName by vm.roomName.collectAsState()
+    val isEncrypted by vm.isEncrypted.collectAsState()
+    val canLoadMore by vm.canLoadMore.collectAsState()
+    val loadingOlder by vm.loadingOlder.collectAsState()
     val inputText by vm.inputText.collectAsState()
+    val searchQuery by vm.searchQuery.collectAsState()
+    val sendError by vm.sendError.collectAsState()
+    val editingEventId by vm.editingEventId.collectAsState()
     val listState = rememberLazyListState()
+    var selectedMessage by remember { mutableStateOf<Message?>(null) }
 
-    LaunchedEffect(messages.size) {
+    LaunchedEffect(messages.size, searchQuery) {
-        if (messages.isNotEmpty()) {
+        if (messages.isNotEmpty() && searchQuery.isBlank()) {
             listState.animateScrollToItem(messages.size - 1)
         }
     }
@@ -90,12 +104,75 @@ fun ChatScreen(
             )
         }
 
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 16.dp),
+            horizontalArrangement = Arrangement.End
+        ) {
+            Text(
+                text = if (isEncrypted) "[e2ee]" else "[plain]",
+                style = TextStyle(fontFamily = TerminalFont, fontSize = 11.sp, color = MatrixGreenDim)
+            )
+        }
+
         Text(
             text = "─".repeat(50),
             style = TextStyle(fontFamily = TerminalFont, fontSize = 11.sp, color = MatrixBorder),
             modifier = Modifier.padding(horizontal = 8.dp)
         )
 
+        OutlinedTextField(
+            value = searchQuery,
+            onValueChange = vm::setSearchQuery,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 12.dp, vertical = 8.dp),
+            placeholder = {
+                Text(
+                    "search loaded messages...",
+                    style = TextStyle(fontFamily = TerminalFont, color = MatrixBorder)
+                )
+            },
+            textStyle = TextStyle(fontFamily = TerminalFont, fontSize = 13.sp, color = MatrixGreen),
+            singleLine = true,
+            colors = OutlinedTextFieldDefaults.colors(
+                focusedBorderColor = MatrixGreen,
+                unfocusedBorderColor = MatrixBorder,
+                cursorColor = MatrixGreen,
+                focusedTextColor = MatrixGreen,
+                unfocusedTextColor = MatrixGreen,
+                focusedContainerColor = MatrixBackground,
+                unfocusedContainerColor = MatrixBackground
+            )
+        )
+
+        if (editingEventId != null) {
+            Row(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 4.dp),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(
+                    text = "editing message...",
+                    style = TextStyle(fontFamily = TerminalFont, fontSize = 12.sp, color = MatrixGreenDim)
+                )
+                Spacer(Modifier.weight(1f))
+                TextButton(onClick = vm::cancelEditing, contentPadding = PaddingValues(0.dp)) {
+                    Text("cancel", style = TextStyle(fontFamily = TerminalFont, fontSize = 12.sp, color = MatrixBorder))
+                }
+            }
+        }
+
+        sendError?.let { error ->
+            Text(
+                text = "! $error",
+                style = TextStyle(fontFamily = TerminalFont, fontSize = 11.sp, color = androidx.compose.ui.graphics.Color(0xFFFF4444)),
+                modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp)
+            )
+        }
+
         // Message list
         LazyColumn(
             state = listState,
@@ -105,11 +182,29 @@ fun ChatScreen(
             contentPadding = PaddingValues(vertical = 8.dp),
             verticalArrangement = Arrangement.spacedBy(6.dp)
         ) {
+            if (canLoadMore) {
+                item("load-older") {
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.Center
+                    ) {
+                        TextButton(onClick = vm::loadOlderMessages, enabled = !loadingOlder) {
+                            Text(
+                                text = if (loadingOlder) "[loading older...]" else "[load older]",
+                                style = TextStyle(fontFamily = TerminalFont, fontSize = 12.sp, color = MatrixGreenDim)
+                            )
+                        }
+                    }
+                }
+            }
             items(
                 items = messages,
                 key = { it.eventId.ifEmpty { "${it.sender}:${it.timestamp}" } }
             ) { msg ->
-                MessageRow(msg)
+                MessageRow(
+                    msg = msg,
+                    onLongPress = { selectedMessage = msg }
+                )
             }
         }
 
@@ -161,29 +256,81 @@ fun ChatScreen(
             )
         }
     }
+
+    selectedMessage?.let { message ->
+        AlertDialog(
+            containerColor = MatrixBackground,
+            onDismissRequest = { selectedMessage = null },
+            title = {
+                Text(
+                    text = "message actions",
+                    style = TextStyle(fontFamily = TerminalFont, fontSize = 16.sp, color = MatrixGreen)
+                )
+            },
+            text = {
+                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    TextButton(onClick = {
+                        vm.reactTo(message.eventId, "👍")
+                        selectedMessage = null
+                    }) { Text("react 👍", fontFamily = TerminalFont, color = MatrixGreen) }
+                    TextButton(onClick = {
+                        vm.reactTo(message.eventId, "❤️")
+                        selectedMessage = null
+                    }) { Text("react ❤️", fontFamily = TerminalFont, color = MatrixGreen) }
+                    TextButton(onClick = {
+                        vm.reactTo(message.eventId, "👀")
+                        selectedMessage = null
+                    }) { Text("react 👀", fontFamily = TerminalFont, color = MatrixGreen) }
+                    if (message.isOutgoing) {
+                        TextButton(onClick = {
+                            vm.startEditing(message)
+                            selectedMessage = null
+                        }) { Text("edit", fontFamily = TerminalFont, color = MatrixGreen) }
+                    }
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = { selectedMessage = null }) {
+                    Text("close", fontFamily = TerminalFont, color = MatrixBorder)
+                }
+            }
+        )
+    }
 }
 
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
-private fun MessageRow(msg: Message) {
+private fun MessageRow(msg: Message, onLongPress: () -> Unit) {
     val shortSender = msg.sender.removePrefix("@").substringBefore(":")
 
     if (msg.isOutgoing) {
         Row(
-            modifier = Modifier.fillMaxWidth(),
+            modifier = Modifier
+                .fillMaxWidth()
+                .combinedClickable(onClick = {}, onLongClick = onLongPress),
             horizontalArrangement = Arrangement.End
         ) {
-            Text(
+            Column(
-                text = "> ${msg.body}",
+                horizontalAlignment = Alignment.End,
-                style = TextStyle(
-                    fontFamily = TerminalFont,
-                    fontSize = 14.sp,
-                    color = MatrixGreenDim
-                ),
                 modifier = Modifier.widthIn(max = 300.dp)
-            )
+            ) {
+                Text(
+                    text = "> ${msg.body}",
+                    style = TextStyle(
+                        fontFamily = TerminalFont,
+                        fontSize = 14.sp,
+                        color = MatrixGreenDim
+                    )
+                )
+                MessageMeta(msg)
+            }
         }
     } else {
-        Column(modifier = Modifier.widthIn(max = 300.dp)) {
+        Column(
+            modifier = Modifier
+                .widthIn(max = 300.dp)
+                .combinedClickable(onClick = {}, onLongClick = onLongPress)
+        ) {
             Text(
                 text = "< $shortSender",
                 style = TextStyle(fontFamily = TerminalFont, fontSize = 11.sp, color = MatrixBorder)
@@ -192,6 +339,23 @@ private fun MessageRow(msg: Message) {
                 text = "  ${msg.body}",
                 style = TextStyle(fontFamily = TerminalFont, fontSize = 14.sp, color = MatrixGreen)
             )
+            MessageMeta(msg)
         }
     }
 }
+
+@Composable
+private fun MessageMeta(msg: Message) {
+    val pieces = buildList {
+        if (msg.isEdited) add("edited")
+        if (msg.reactions.isNotEmpty()) {
+            add(msg.reactions.entries.joinToString(" ") { "${it.key} ${it.value}" })
+        }
+    }
+    if (pieces.isNotEmpty()) {
+        Text(
+            text = pieces.joinToString("  "),
+            style = TextStyle(fontFamily = TerminalFont, fontSize = 10.sp, color = MatrixBorder)
+        )
+    }
+}

app/src/main/java/com/ltadeu6/matrix/chat/ChatViewModel.kt

@@ -5,7 +5,9 @@ import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import com.ltadeu6.matrix.matrix.MatrixSession
 import com.ltadeu6.matrix.matrix.Message
+import com.ltadeu6.matrix.matrix.Room
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -18,27 +20,104 @@ class ChatViewModel(
     val roomId: String
 ) : ViewModel() {
 
-    val messages: StateFlow<List<Message>> = session.syncState
+    private val roomState: StateFlow<Room?> = session.syncState
+        .map { it.rooms[roomId] }
+        .stateIn(viewModelScope, SharingStarted.Eagerly, null)
+
+    private val allMessages: StateFlow<List<Message>> = session.syncState
         .map { it.messages[roomId] ?: emptyList() }
         .stateIn(viewModelScope, SharingStarted.Eagerly, emptyList())
 
-    val roomName: StateFlow<String> = session.syncState
-        .map { it.rooms[roomId]?.name ?: roomId }
-        .stateIn(viewModelScope, SharingStarted.Eagerly, roomId)
-
     private val _inputText = MutableStateFlow("")
     val inputText: StateFlow<String> = _inputText.asStateFlow()
+    private val _searchQuery = MutableStateFlow("")
+    val searchQuery: StateFlow<String> = _searchQuery.asStateFlow()
+    private val _sendError = MutableStateFlow<String?>(null)
+    val sendError: StateFlow<String?> = _sendError.asStateFlow()
+    private val _loadingOlder = MutableStateFlow(false)
+    val loadingOlder: StateFlow<Boolean> = _loadingOlder.asStateFlow()
+    private val _editingEventId = MutableStateFlow<String?>(null)
+    val editingEventId: StateFlow<String?> = _editingEventId.asStateFlow()
+
+    val roomName: StateFlow<String> = roomState
+        .map { it?.name ?: roomId }
+        .stateIn(viewModelScope, SharingStarted.Eagerly, roomId)
+
+    val isEncrypted: StateFlow<Boolean> = roomState
+        .map { it?.isEncrypted == true }
+        .stateIn(viewModelScope, SharingStarted.Eagerly, false)
+
+    val canLoadMore: StateFlow<Boolean> = roomState
+        .map { it?.canLoadMore == true }
+        .stateIn(viewModelScope, SharingStarted.Eagerly, false)
+
+    val messages: StateFlow<List<Message>> = combine(allMessages, searchQuery) { messages, query ->
+        val term = query.trim()
+        if (term.isBlank()) messages
+        else messages.filter {
+            it.body.contains(term, ignoreCase = true) || it.sender.contains(term, ignoreCase = true)
+        }
+    }.stateIn(viewModelScope, SharingStarted.Eagerly, emptyList())
 
     fun setInput(text: String) {
+        _sendError.value = null
         _inputText.value = text
     }
 
+    fun setSearchQuery(text: String) {
+        _searchQuery.value = text
+    }
+
+    fun clearSendError() {
+        _sendError.value = null
+    }
+
+    fun startEditing(message: Message) {
+        if (!message.isOutgoing) return
+        _editingEventId.value = message.eventId
+        _inputText.value = message.body
+        _sendError.value = null
+    }
+
+    fun cancelEditing() {
+        _editingEventId.value = null
+        _inputText.value = ""
+    }
+
+    fun reactTo(eventId: String, key: String) {
+        viewModelScope.launch {
+            session.sendReaction(roomId, eventId, key)
+                .onFailure { _sendError.value = it.message ?: "failed to send reaction" }
+        }
+    }
+
+    fun loadOlderMessages() {
+        if (_loadingOlder.value) return
+        viewModelScope.launch {
+            _loadingOlder.value = true
+            session.loadOlderMessages(roomId)
+                .onFailure { _sendError.value = it.message ?: "failed to load older messages" }
+            _loadingOlder.value = false
+        }
+    }
+
     fun sendMessage() {
         val text = _inputText.value.trim()
         if (text.isBlank()) return
-        _inputText.value = ""
+        val editingEventId = _editingEventId.value
         viewModelScope.launch {
-            session.sendMessage(roomId, text)
+            val result = if (editingEventId != null) {
+                session.editMessage(roomId, editingEventId, text)
+            } else {
+                session.sendMessage(roomId, text)
+            }
+            result.onSuccess {
+                _inputText.value = ""
+                _editingEventId.value = null
+                _sendError.value = null
+            }.onFailure {
+                _sendError.value = it.message ?: if (editingEventId != null) "failed to edit message" else "failed to send message"
+            }
         }
     }
 }

app/src/main/java/com/ltadeu6/matrix/matrix/CryptoService.kt

@@ -201,18 +201,23 @@ class CryptoService(
     // Room message decryption / encryption
     // -------------------------------------------------------------------------
 
-    fun decryptRoomEvent(content: JsonObject): String? {
+    fun decryptRoomEventPayload(content: JsonObject): JsonObject? {
         if ((content["algorithm"] as? JsonPrimitive)?.content != "m.megolm.v1.aes-sha2") return null
         val sessionId = (content["session_id"] as? JsonPrimitive)?.content ?: return null
         val ciphertext = (content["ciphertext"] as? JsonPrimitive)?.content ?: return null
         val session = inboundSessions[sessionId] ?: return null
         return try {
             val result = session.decryptMessage(ciphertext)
-            val decrypted = json.parseToJsonElement(result.mDecryptedMessage).jsonObject
+            json.parseToJsonElement(result.mDecryptedMessage).jsonObject
-            (decrypted["content"]?.jsonObject?.get("body") as? JsonPrimitive)?.content
         } catch (_: Exception) { null }
     }
 
+    fun decryptRoomEvent(content: JsonObject): String? =
+        (decryptRoomEventPayload(content)
+            ?.get("content")?.jsonObject
+            ?.get("body") as? JsonPrimitive)
+            ?.content
+
     fun encryptRoomEvent(roomId: String, plaintext: String): JsonObject? {
         val session = outboundSessions[roomId] ?: return null
         return try {

app/src/main/java/com/ltadeu6/matrix/matrix/MatrixApi.kt

@@ -63,6 +63,12 @@ interface MatrixApi {
         @Body request: CreateRoomRequest
     ): CreateRoomResponse
 
+    @GET("/_matrix/client/v3/user/{userId}/account_data/m.direct")
+    suspend fun getDirectRooms(
+        @Header("Authorization") auth: String,
+        @Path("userId") userId: String
+    ): JsonObject
+
     @POST("/_matrix/client/v3/rooms/{roomId}/leave")
     suspend fun leaveRoom(
         @Header("Authorization") auth: String,
@@ -101,6 +107,15 @@ interface MatrixApi {
         @Path("roomId") roomId: String
     ): JoinedMembersResponse
 
+    @GET("/_matrix/client/v3/rooms/{roomId}/messages")
+    suspend fun getMessages(
+        @Header("Authorization") auth: String,
+        @Path("roomId") roomId: String,
+        @Query("from") from: String,
+        @Query("dir") dir: String = "b",
+        @Query("limit") limit: Int = 50
+    ): MessagesResponse
+
     @PUT("/_matrix/client/v3/sendToDevice/{eventType}/{txnId}")
     suspend fun sendToDevice(
         @Header("Authorization") auth: String,

app/src/main/java/com/ltadeu6/matrix/matrix/MatrixModels.kt

@@ -92,7 +92,8 @@ data class JoinedRoomSync(
 @Serializable
 data class Timeline(
     val events: List<RoomEvent> = emptyList(),
-    @SerialName("limited") val limited: Boolean = false
+    @SerialName("limited") val limited: Boolean = false,
+    @SerialName("prev_batch") val prevBatch: String? = null
 )
 
 @Serializable
@@ -157,11 +158,20 @@ data class MemberInfo(
     @SerialName("avatar_url") val avatarUrl: String? = null
 )
 
+@Serializable
+data class MessagesResponse(
+    val chunk: List<RoomEvent> = emptyList(),
+    val end: String? = null,
+    val start: String? = null
+)
+
 // --- Local UI models ---
 
 data class Room(
     val id: String,
-    val name: String
+    val name: String,
+    val isEncrypted: Boolean = false,
+    val canLoadMore: Boolean = false
 )
 
 data class Message(
@@ -169,5 +179,7 @@ data class Message(
     val sender: String,
     val body: String,
     val timestamp: Long,
-    val isOutgoing: Boolean
+    val isOutgoing: Boolean,
+    val isEdited: Boolean = false,
+    val reactions: Map<String, Int> = emptyMap()
 )

app/src/main/java/com/ltadeu6/matrix/matrix/MatrixSession.kt

@@ -62,6 +62,9 @@ class MatrixSession private constructor(private val appContext: Context) {
     private var syncJob: Job? = null
     private var api: MatrixApi? = null
     private var cryptoService: CryptoService? = null
+    private val roomEventCache = mutableMapOf<String, MutableList<RoomEvent>>()
+    private val roomPrevBatches = mutableMapOf<String, String?>()
+    private val directRoomTargets = mutableMapOf<String, String>()
 
     /**
      * SAS device verification service. Created once; userId/deviceId/cryptoService
@@ -176,6 +179,9 @@ class MatrixSession private constructor(private val appContext: Context) {
         encryptedRooms.clear()
         sharedSessionRooms.clear()
         requestedSessions.clear()
+        roomEventCache.clear()
+        roomPrevBatches.clear()
+        directRoomTargets.clear()
         verificationService.dismiss()
         verificationService.userId = ""
         verificationService.deviceId = ""
@@ -185,30 +191,66 @@ class MatrixSession private constructor(private val appContext: Context) {
     }
 
     suspend fun sendMessage(roomId: String, body: String): Result<Unit> {
+        return sendTimelineEvent(
+            roomId = roomId,
+            eventType = "m.room.message",
+            content = buildJsonObject {
+                put("msgtype", "m.text")
+                put("body", body)
+            }
+        )
+    }
+
+    suspend fun editMessage(roomId: String, eventId: String, body: String): Result<Unit> {
+        return sendTimelineEvent(
+            roomId = roomId,
+            eventType = "m.room.message",
+            content = buildJsonObject {
+                put("msgtype", "m.text")
+                put("body", "* $body")
+                put("m.new_content", buildJsonObject {
+                    put("msgtype", "m.text")
+                    put("body", body)
+                })
+                put("m.relates_to", buildJsonObject {
+                    put("rel_type", "m.replace")
+                    put("event_id", eventId)
+                })
+            }
+        )
+    }
+
+    suspend fun sendReaction(roomId: String, eventId: String, key: String): Result<Unit> {
+        return sendTimelineEvent(
+            roomId = roomId,
+            eventType = "m.reaction",
+            content = buildJsonObject {
+                put("m.relates_to", buildJsonObject {
+                    put("rel_type", "m.annotation")
+                    put("event_id", eventId)
+                    put("key", key)
+                })
+            }
+        )
+    }
+
+    suspend fun loadOlderMessages(roomId: String, limit: Int = 50): Result<Unit> {
         val token = accessToken ?: return Result.failure(Exception("Not logged in"))
         val matrixApi = api ?: return Result.failure(Exception("No API client"))
+        val from = roomPrevBatches[roomId] ?: return Result.failure(Exception("No older messages"))
         return runCatching {
-            val txnId = "${System.currentTimeMillis()}_${txnCounter.incrementAndGet()}"
+            val response = matrixApi.getMessages("Bearer $token", roomId, from = from, limit = limit)
-            val crypto = cryptoService
+            mergeRoomEvents(roomId, response.chunk)
-            if (crypto != null && roomId in encryptedRooms) {
+            roomPrevBatches[roomId] = response.end
-                // Share our outbound session with room members if we haven't yet
+
-                if (roomId !in sharedSessionRooms) {
+            val current = _syncState.value
-                    shareGroupSession(roomId)
+            val rooms = current.rooms.toMutableMap()
-                    sharedSessionRooms.add(roomId)
+            val messages = current.messages.toMutableMap()
-                }
+            val missingSessions = mutableListOf<MissingSession>()
-                val eventPayload = buildJsonObject {
+            rebuildRoomMessages(roomId, rooms, messages, missingSessions)
-                    put("room_id", roomId)
+            _syncState.value = SyncState(rooms = rooms, messages = messages)
-                    put("type", "m.room.message")
+            if (missingSessions.isNotEmpty()) {
-                    put("content", buildJsonObject {
+                sendKeyRequests(missingSessions, "Bearer $token", matrixApi)
-                        put("msgtype", "m.text")
-                        put("body", body)
-                    })
-                }.toString()
-                val encryptedContent = crypto.encryptRoomEvent(roomId, eventPayload)
-                    ?: throw Exception("Encryption failed — outbound session not established")
-                matrixApi.sendEvent("Bearer $token", roomId, "m.room.encrypted", txnId, encryptedContent)
-            } else {
-                matrixApi.sendMessage("Bearer $token", roomId, txnId, SendMessageRequest(body = body))
             }
         }
     }
@@ -228,6 +270,8 @@ class MatrixSession private constructor(private val appContext: Context) {
             )
             encryptedRooms.remove(roomId)
             sharedSessionRooms.remove(roomId)
+            roomEventCache.remove(roomId)
+            roomPrevBatches.remove(roomId)
         }
     }
 
@@ -295,6 +339,36 @@ class MatrixSession private constructor(private val appContext: Context) {
         }
     }
 
+    private suspend fun sendTimelineEvent(
+        roomId: String,
+        eventType: String,
+        content: JsonObject
+    ): Result<Unit> {
+        val token = accessToken ?: return Result.failure(Exception("Not logged in"))
+        val matrixApi = api ?: return Result.failure(Exception("No API client"))
+        return runCatching {
+            val txnId = "${System.currentTimeMillis()}_${txnCounter.incrementAndGet()}"
+            val crypto = cryptoService
+            if (roomId in encryptedRooms) {
+                if (crypto == null) throw Exception("Encryption unavailable for this room")
+                if (roomId !in sharedSessionRooms) {
+                    shareGroupSession(roomId)
+                    sharedSessionRooms.add(roomId)
+                }
+                val eventPayload = buildJsonObject {
+                    put("room_id", roomId)
+                    put("type", eventType)
+                    put("content", content)
+                }.toString()
+                val encryptedContent = crypto.encryptRoomEvent(roomId, eventPayload)
+                    ?: throw Exception("Encryption failed — outbound session not established")
+                matrixApi.sendEvent("Bearer $token", roomId, "m.room.encrypted", txnId, encryptedContent)
+            } else {
+                matrixApi.sendEvent("Bearer $token", roomId, eventType, txnId, content)
+            }
+        }
+    }
+
     /**
      * Sends `m.room_key_request` to-device events to all of our own devices (`*`) for every
      * session we failed to decrypt.  Deduplicates by `roomId+sessionId` so we only ask once.
@@ -490,6 +564,7 @@ class MatrixSession private constructor(private val appContext: Context) {
 
                     if (isFirstSync) {
                         isFirstSync = false
+                        refreshDirectRoomTargets(token, matrixApi)
                         fetchMissingRoomNames(token, matrixApi)
                     }
                 } catch (e: CancellationException) {
@@ -501,15 +576,48 @@ class MatrixSession private constructor(private val appContext: Context) {
         }
     }
 
+    private suspend fun refreshDirectRoomTargets(token: String, matrixApi: MatrixApi) {
+        val userId = currentUserId ?: return
+        val direct = runCatching { matrixApi.getDirectRooms("Bearer $token", userId) }.getOrNull() ?: return
+        directRoomTargets.clear()
+        direct.forEach { (mxid, roomIdsJson) ->
+            val roomIds = roomIdsJson as? JsonArray ?: return@forEach
+            roomIds.forEach { roomIdJson ->
+                val roomId = (roomIdJson as? JsonPrimitive)?.content ?: return@forEach
+                directRoomTargets[roomId] = mxid
+            }
+        }
+    }
+
     private suspend fun fetchMissingRoomNames(token: String, matrixApi: MatrixApi) {
         val current = _syncState.value
         val updates = mutableMapOf<String, Room>()
         current.rooms.forEach { (roomId, room) ->
-            if (room.name == roomId) {
+            val directTarget = directRoomTargets[roomId]
+            val shouldResolve = directTarget != null || room.name == roomId || room.name.isBlank()
+            if (shouldResolve) {
                 val name = runCatching { matrixApi.getRoomName("Bearer $token", roomId).name }
-                    .getOrNull()?.takeIf { it.isNotBlank() }
+                    .getOrNull()
+                    ?.takeIf { it.isNotBlank() && directTarget == null }
                     ?: runCatching { matrixApi.getRoomAlias("Bearer $token", roomId).alias }
-                        .getOrNull()?.takeIf { it.isNotBlank() }
+                        .getOrNull()
+                        ?.takeIf { it.isNotBlank() && directTarget == null }
+                    ?: runCatching {
+                        val joined = matrixApi.getJoinedMembers("Bearer $token", roomId).joined
+                        val preferred = directTarget?.let { target ->
+                            joined[target]?.displayName?.takeIf { it.isNotBlank() } ?: joined[target]?.let { target }
+                        }
+                        if (preferred != null) {
+                            preferred
+                        } else {
+                            val others = joined.entries.filter { it.key != currentUserId }
+                            if (others.size == 1) {
+                                others.first().value.displayName?.takeIf { it.isNotBlank() } ?: others.first().key
+                            } else {
+                                null
+                            }
+                        }
+                    }.getOrNull()
                 if (name != null) updates[roomId] = room.copy(name = name)
             }
         }
@@ -518,6 +626,10 @@ class MatrixSession private constructor(private val appContext: Context) {
         }
     }
 
+    private fun prefersMemberName(roomId: String): Boolean {
+        return directRoomTargets.containsKey(roomId)
+    }
+
     private fun processSyncResponse(response: SyncResponse): List<MissingSession> {
         val current = _syncState.value
         val rooms = current.rooms.toMutableMap()
@@ -532,60 +644,173 @@ class MatrixSession private constructor(private val appContext: Context) {
 
             val nameEvent = allStateEvents.lastOrNull { it.type == "m.room.name" }
             val aliasEvent = allStateEvents.lastOrNull { it.type == "m.room.canonical_alias" }
-            val resolvedName = (nameEvent?.content?.get("name") as? JsonPrimitive)?.content
+            val explicitName = (nameEvent?.content?.get("name") as? JsonPrimitive)?.content
                 ?: (aliasEvent?.content?.get("alias") as? JsonPrimitive)?.content
-                ?: rooms[roomId]?.name
+            val existingName = rooms[roomId]?.name
-                ?: roomId
+            val resolvedName = if (prefersMemberName(roomId)) {
-
+                existingName?.takeIf { it.isNotBlank() && it != roomId }
-            rooms[roomId] = Room(id = roomId, name = resolvedName)
+                    ?: explicitName
+                    ?: roomId
+            } else {
+                explicitName
+                    ?: existingName
+                    ?: roomId
+            }
 
             // Track encryption state
             val roomIsEncrypted = (roomData.state?.events ?: emptyList())
                 .any { it.type == "m.room.encryption" }
             if (roomIsEncrypted) encryptedRooms.add(roomId)
-
+            roomPrevBatches[roomId] = roomData.timeline?.prevBatch ?: roomPrevBatches[roomId]
-            val newMsgs = roomData.timeline?.events
+            rooms[roomId] = Room(
-                ?.filter { it.type == "m.room.message" || it.type == "m.room.encrypted" }
+                id = roomId,
-                ?.mapNotNull { event ->
+                name = resolvedName,
-                    val body = when (event.type) {
+                isEncrypted = roomId in encryptedRooms,
-                        "m.room.message" ->
+                canLoadMore = roomPrevBatches[roomId] != null
-                            (event.content?.get("body") as? JsonPrimitive)?.content
+            )
-                                ?: return@mapNotNull null
+            mergeRoomEvents(roomId, roomData.timeline?.events ?: emptyList())
-                        "m.room.encrypted" -> tryDecrypt(event, roomId, missingSessions)
+            rebuildRoomMessages(roomId, rooms, messages, missingSessions)
-                        else -> return@mapNotNull null
-                    }
-                    Message(
-                        eventId = event.eventId,
-                        sender = event.sender,
-                        body = body,
-                        timestamp = event.timestamp,
-                        isOutgoing = event.sender == currentUserId
-                    )
-                } ?: emptyList()
-
-            if (newMsgs.isNotEmpty()) {
-                val existing = messages[roomId] ?: emptyList()
-                val existingIds = existing.map { it.eventId }.toSet()
-                val merged = existing + newMsgs.filter { it.eventId !in existingIds }
-                messages[roomId] = merged.sortedBy { it.timestamp }
-            }
         }
 
         _syncState.value = SyncState(rooms = rooms, messages = messages)
         return missingSessions
     }
 
-    private fun tryDecrypt(event: RoomEvent, roomId: String, missingSessions: MutableList<MissingSession>): String {
+    private fun mergeRoomEvents(roomId: String, events: List<RoomEvent>) {
-        val content = event.content ?: return "[encrypted message]"
+        if (events.isEmpty()) return
-        val result = cryptoService?.decryptRoomEvent(content)
+        val existing = roomEventCache.getOrPut(roomId) { mutableListOf() }
-        if (result == null) {
+        val knownIds = existing.mapTo(mutableSetOf()) { it.eventId }
-            val sessionId = (content["session_id"] as? JsonPrimitive)?.content
+        events.forEach { event ->
-            val senderKey = (content["sender_key"] as? JsonPrimitive)?.content
+            val dedupeKey = event.eventId.ifEmpty { "${event.type}:${event.sender}:${event.timestamp}" }
-            if (sessionId != null && senderKey != null) {
+            if (dedupeKey !in knownIds) {
-                missingSessions.add(MissingSession(roomId, senderKey, sessionId))
+                existing.add(event)
+                knownIds.add(dedupeKey)
             }
         }
-        return result ?: "[encrypted message]"
+    }
+
+    private fun rebuildRoomMessages(
+        roomId: String,
+        rooms: MutableMap<String, Room>,
+        messages: MutableMap<String, List<Message>>,
+        missingSessions: MutableList<MissingSession>
+    ) {
+        val cachedEvents = roomEventCache[roomId].orEmpty().sortedBy { it.timestamp }
+        val builtMessages = mutableListOf<Message>()
+        val messageIndexById = mutableMapOf<String, Int>()
+        val pendingEdits = mutableMapOf<String, String>()
+        val pendingReactions = mutableMapOf<String, MutableMap<String, Int>>()
+
+        cachedEvents.forEach { event ->
+            val decoded = decodeTimelineEvent(roomId, event, missingSessions) ?: return@forEach
+            val relatesTo = decoded.content["m.relates_to"]?.jsonObject
+            val relType = (relatesTo?.get("rel_type") as? JsonPrimitive)?.content
+
+            when {
+                decoded.type == "m.reaction" && relType == "m.annotation" -> {
+                    val targetId = (relatesTo["event_id"] as? JsonPrimitive)?.content ?: return@forEach
+                    val reactionKey = (relatesTo["key"] as? JsonPrimitive)?.content ?: return@forEach
+                    val idx = messageIndexById[targetId]
+                    if (idx != null) {
+                        val current = builtMessages[idx]
+                        val updated = current.reactions.toMutableMap()
+                        updated[reactionKey] = (updated[reactionKey] ?: 0) + 1
+                        builtMessages[idx] = current.copy(reactions = updated.toSortedMap())
+                    } else {
+                        val pending = pendingReactions.getOrPut(targetId) { mutableMapOf() }
+                        pending[reactionKey] = (pending[reactionKey] ?: 0) + 1
+                    }
+                }
+
+                decoded.type == "m.room.message" && relType == "m.replace" -> {
+                    val targetId = (relatesTo["event_id"] as? JsonPrimitive)?.content ?: return@forEach
+                    val newBody = (decoded.content["m.new_content"]?.jsonObject?.get("body") as? JsonPrimitive)?.content
+                        ?: (decoded.content["body"] as? JsonPrimitive)?.content
+                        ?: return@forEach
+                    val idx = messageIndexById[targetId]
+                    if (idx != null) {
+                        val current = builtMessages[idx]
+                        builtMessages[idx] = current.copy(body = newBody, isEdited = true)
+                    } else {
+                        pendingEdits[targetId] = newBody
+                    }
+                }
+
+                decoded.type == "m.room.message" -> {
+                    val body = (decoded.content["body"] as? JsonPrimitive)?.content ?: return@forEach
+                    val editedBody = pendingEdits.remove(event.eventId)
+                    val message = Message(
+                        eventId = event.eventId,
+                        sender = event.sender,
+                        body = editedBody ?: body,
+                        timestamp = event.timestamp,
+                        isOutgoing = event.sender == currentUserId,
+                        isEdited = editedBody != null,
+                        reactions = pendingReactions.remove(event.eventId)?.toSortedMap() ?: emptyMap()
+                    )
+                    messageIndexById[event.eventId] = builtMessages.size
+                    builtMessages.add(message)
+                }
+            }
+        }
+
+        messages[roomId] = builtMessages
+        rooms[roomId] = rooms[roomId]?.copy(
+            isEncrypted = roomId in encryptedRooms,
+            canLoadMore = roomPrevBatches[roomId] != null
+        ) ?: Room(
+            id = roomId,
+            name = roomId,
+            isEncrypted = roomId in encryptedRooms,
+            canLoadMore = roomPrevBatches[roomId] != null
+        )
+    }
+
+    private data class DecodedTimelineEvent(
+        val type: String,
+        val content: JsonObject
+    )
+
+    private fun decodeTimelineEvent(
+        roomId: String,
+        event: RoomEvent,
+        missingSessions: MutableList<MissingSession>
+    ): DecodedTimelineEvent? {
+        return when (event.type) {
+            "m.room.message", "m.reaction" -> {
+                val content = event.content ?: return null
+                DecodedTimelineEvent(event.type, content)
+            }
+
+            "m.room.encrypted" -> {
+                val encryptedContent = event.content ?: return DecodedTimelineEvent(
+                    type = "m.room.message",
+                    content = buildJsonObject {
+                        put("body", "[encrypted message]")
+                    }
+                )
+                val decrypted = cryptoService?.decryptRoomEventPayload(encryptedContent)
+                if (decrypted == null) {
+                    val sessionId = (encryptedContent["session_id"] as? JsonPrimitive)?.content
+                    val senderKey = (encryptedContent["sender_key"] as? JsonPrimitive)?.content
+                    if (sessionId != null && senderKey != null) {
+                        missingSessions.add(MissingSession(roomId, senderKey, sessionId))
+                    }
+                    DecodedTimelineEvent(
+                        type = "m.room.message",
+                        content = buildJsonObject {
+                            put("body", "[encrypted message]")
+                        }
+                    )
+                } else {
+                    val innerType = (decrypted["type"] as? JsonPrimitive)?.content ?: return null
+                    val innerContent = decrypted["content"]?.jsonObject ?: return null
+                    DecodedTimelineEvent(innerType, innerContent)
+                }
+            }
+
+            else -> null
+        }
     }
 
     // -------------------------------------------------------------------------

app/src/main/java/com/ltadeu6/matrix/matrix/VerificationService.kt

@@ -61,6 +61,7 @@ class VerificationService(private val scope: CoroutineScope) {
     private var pendingTheirMac: JsonObject? = null
     private var selectedMacMethod: String? = null
     private var hasConfirmedLocally: Boolean = false
+    private var hasVerifiedTheirMac: Boolean = false
 
     fun processToDeviceEvent(event: JsonObject) {
         val type = (event["type"] as? JsonPrimitive)?.content ?: return
@@ -174,6 +175,7 @@ class VerificationService(private val scope: CoroutineScope) {
         val sasBytes = sas.generateShortCode(info, 6)
         val emojis = sasBytes.toSasEmojis()
         hasConfirmedLocally = false
+        hasVerifiedTheirMac = false
         _state.value = VerificationState.ShowingEmojis(txnId, emojis)
     }
 
@@ -272,6 +274,7 @@ class VerificationService(private val scope: CoroutineScope) {
 
             val doneContent = buildJsonObject { put("transaction_id", txnId) }
             onSend(toUser, toDevice, "m.key.verification.done", "${txnId}_done", doneContent)
+            hasVerifiedTheirMac = true
             cleanup()
             _state.value = VerificationState.Done
             onVerified()
@@ -280,6 +283,9 @@ class VerificationService(private val scope: CoroutineScope) {
 
     private fun handleDone(txnId: String) {
         if (txnId != currentTxnId) return
+        if (!hasVerifiedTheirMac) {
+            return
+        }
         cleanup()
         _state.value = VerificationState.Done
         onVerified()
@@ -330,6 +336,7 @@ class VerificationService(private val scope: CoroutineScope) {
         pendingTheirMac = null
         selectedMacMethod = null
         hasConfirmedLocally = false
+        hasVerifiedTheirMac = false
     }
 }
 

app/src/main/java/com/ltadeu6/matrix/rooms/RoomListScreen.kt

@@ -11,6 +11,7 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.AlertDialog
@@ -73,6 +74,7 @@ fun RoomListScreen(
     Column(
         modifier = Modifier
             .fillMaxSize()
+            .statusBarsPadding()
             .padding(horizontal = 16.dp, vertical = 12.dp)
     ) {
         Row(
@@ -116,7 +118,11 @@ fun RoomListScreen(
         if (actionError != null) {
             Text(
                 text = "  ${actionError}",
-                style = TextStyle(fontFamily = TerminalFont, fontSize = 11.sp, color = MatrixGreenDim)
+                style = TextStyle(
+                    fontFamily = TerminalFont,
+                    fontSize = 11.sp,
+                    color = androidx.compose.ui.graphics.Color(0xFFFF4444)
+                )
             )
         }
 
@@ -303,10 +309,26 @@ private fun RoomRow(room: Room, onClick: () -> Unit, onLongPress: () -> Unit) {
             .combinedClickable(onClick = onClick, onLongClick = onLongPress)
             .padding(vertical = 10.dp, horizontal = 4.dp)
     ) {
-        Text(
+        Row(
-            text = "> ${room.name}",
+            modifier = Modifier.fillMaxWidth(),
-            style = TextStyle(fontFamily = TerminalFont, fontSize = 15.sp, color = MatrixGreen)
+            horizontalArrangement = Arrangement.SpaceBetween,
-        )
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = "> ${room.name}",
+                style = TextStyle(fontFamily = TerminalFont, fontSize = 15.sp, color = MatrixGreen)
+            )
+            val status = buildList {
+                if (room.isEncrypted) add("e2ee")
+                if (room.canLoadMore) add("history")
+            }.joinToString(" | ")
+            if (status.isNotBlank()) {
+                Text(
+                    text = "[$status]",
+                    style = TextStyle(fontFamily = TerminalFont, fontSize = 10.sp, color = MatrixGreenDim)
+                )
+            }
+        }
         Text(
             text = "  ${room.id}",
             style = TextStyle(fontFamily = TerminalFont, fontSize = 10.sp, color = MatrixBorder)