Phase 2 refinements: Firebase config, dev environment fixes, phase 3 requirement draft

- Integrated Firebase SDK in both Flutter apps (google-services, firebase_options)
- Fixed auth flow, API client, and pairing/status blocs for dev environment
- Added full Flutter project scaffolds (android, ios, web, etc.)
- Added phase 3 chat engine requirement document
- Added bugreport zip pattern to gitignore

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mitra_app/lib/main.dart

@@ -1,6 +1,7 @@
 import 'package:firebase_core/firebase_core.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:go_router/go_router.dart';
 import 'core/api/api_client.dart';
 import 'core/auth/auth_bloc.dart';
 import 'core/status/status_bloc.dart';
@@ -23,6 +24,8 @@ class App extends StatefulWidget {
 
 class _AppState extends State<App> with WidgetsBindingObserver {
   late final ApiClient _apiClient;
+  late final AuthBloc _authBloc;
+  late final GoRouter _router;
   late final StatusBloc _statusBloc;
   late final ChatRequestBloc _chatRequestBloc;
 
@@ -31,6 +34,8 @@ class _AppState extends State<App> with WidgetsBindingObserver {
     super.initState();
     WidgetsBinding.instance.addObserver(this);
     _apiClient = ApiClient();
+    _authBloc = AuthBloc(apiClient: _apiClient)..add(AppStarted());
+    _router = buildRouter(_authBloc);
     _statusBloc = StatusBloc(apiClient: _apiClient);
     _chatRequestBloc = ChatRequestBloc(apiClient: _apiClient);
   }
@@ -38,6 +43,8 @@ class _AppState extends State<App> with WidgetsBindingObserver {
   @override
   void dispose() {
     WidgetsBinding.instance.removeObserver(this);
+    _authBloc.close();
+    _router.dispose();
     _statusBloc.close();
     _chatRequestBloc.close();
     super.dispose();
@@ -56,7 +63,7 @@ class _AppState extends State<App> with WidgetsBindingObserver {
   Widget build(BuildContext context) {
     return MultiBlocProvider(
       providers: [
-        BlocProvider(create: (_) => AuthBloc(apiClient: _apiClient)..add(AppStarted())),
+        BlocProvider.value(value: _authBloc),
         BlocProvider.value(value: _statusBloc),
         BlocProvider.value(value: _chatRequestBloc),
         RepositoryProvider.value(value: _apiClient),
@@ -67,13 +74,9 @@ class _AppState extends State<App> with WidgetsBindingObserver {
             _statusBloc.add(StatusLoadRequested());
           }
         },
-        child: BlocBuilder<AuthBloc, AuthState>(
-          builder: (context, state) {
-            return MaterialApp.router(
-              title: 'Halo Bestie Mitra',
-              routerConfig: buildRouter(context.read<AuthBloc>()),
-            );
-          },
+        child: MaterialApp.router(
+          title: 'Halo Bestie Mitra',
+          routerConfig: _router,
         ),
       ),
     );