feat: Phase 1 complete — Matrix login, rooms, chat, profile

- Direct m.login.password auth against matrix.m8chat.au
- Room list with unread badges, last message, timestamps
- Chat timeline (text, images, files, replies, reactions)
- Profile screen with expandable Notifications and Security sections
- Olm E2EE initialisation (web WASM bootstrap)
- Global error handler preventing Matrix SDK crashes
- GoRouter with refreshListenable (no recreation on auth change)
- Feature-first clean architecture: Riverpod + GoRouter + Drift
- Deployed to https://app2.m8chat.au

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/features/rooms/data/rooms_repository.dart

@@ -0,0 +1,72 @@
+// Version: 1.0.1 | Created: 2026-04-01
+// Rooms repository. Reads room list from the Matrix SDK client.
+
+import 'package:matrix/matrix.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+import '../../../core/network/matrix_client.dart';
+import '../domain/room_model.dart';
+
+part 'rooms_repository.g.dart';
+
+@riverpod
+RoomsRepository roomsRepository(Ref ref) {
+  return RoomsRepository(client: ref.watch(matrixClientProvider));
+}
+
+class RoomsRepository {
+  RoomsRepository({required Client client}) : _client = client;
+
+  final Client _client;
+
+  /// Returns the current room list, sorted unread-first then by last activity.
+  List<RoomModel> getRooms() {
+    final rooms = _client.rooms;
+    final models = rooms.map(_toModel).toList();
+
+    models.sort((a, b) {
+      // Unread rooms first.
+      if (a.unreadCount != b.unreadCount) {
+        return b.unreadCount.compareTo(a.unreadCount);
+      }
+      // Then by most recent activity.
+      final aTime = a.lastActivityAt ?? DateTime(0);
+      final bTime = b.lastActivityAt ?? DateTime(0);
+      return bTime.compareTo(aTime);
+    });
+
+    return models;
+  }
+
+  /// Emits current rooms immediately, then re-emits on every sync.
+  /// Immediate yield prevents indefinite spinner while waiting for first sync.
+  Stream<List<RoomModel>> watchRooms() async* {
+    yield getRooms();
+    yield* _client.onSync.stream.map((_) => getRooms());
+  }
+
+  RoomModel _toModel(Room room) {
+    return RoomModel(
+      id: room.id,
+      displayName: room.getLocalizedDisplayname(),
+      avatarUrl: room.avatar?.toString(),
+      lastMessagePreview: _lastMessagePreview(room),
+      lastActivityAt: room.timeCreated,
+      unreadCount: room.notificationCount,
+      isDirectMessage: room.isDirectChat,
+      isDirect: room.isDirectChat,
+    );
+  }
+
+  String? _lastMessagePreview(Room room) {
+    final lastEvent = room.lastEvent;
+    if (lastEvent == null) return null;
+
+    return switch (lastEvent.type) {
+      'm.room.message' => lastEvent.body,
+      'm.room.encrypted' => 'Encrypted message',
+      'm.sticker' => 'Sticker',
+      _ => null,
+    };
+  }
+}