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/presentation/rooms_controller.dart

@@ -0,0 +1,16 @@
+// Version: 1.0.0 | Created: 2026-04-01
+// Riverpod provider that streams the rooms list to the UI.
+
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+import '../data/rooms_repository.dart';
+import '../domain/room_model.dart';
+
+part 'rooms_controller.g.dart';
+
+/// Streams the rooms list. Rebuilds whenever Matrix sync produces changes.
+@riverpod
+Stream<List<RoomModel>> roomsList(Ref ref) {
+  final repo = ref.watch(roomsRepositoryProvider);
+  return repo.watchRooms();
+}