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/main.dart

@@ -0,0 +1,27 @@
+// Version: 1.0.1 | Created: 2026-04-01
+// Application entry point.
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import 'app/app.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // Catch Flutter framework errors (widget build, rendering) without crashing.
+  FlutterError.onError = (details) {
+    debugPrint('[M8Chat] Flutter error: ${details.exceptionAsString()}');
+  };
+
+  // Catch all unhandled async errors — including those thrown by the Matrix SDK
+  // in runInRoot() after login (encryption init, sync startup). Without this
+  // handler the browser runtime crashes and the UI freezes on the spinner.
+  PlatformDispatcher.instance.onError = (error, stack) {
+    debugPrint('[M8Chat] Uncaught error: $error');
+    return true; // returning true marks the error as handled
+  };
+
+  runApp(const ProviderScope(child: M8ChatApp()));
+}