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/features/home/home_screen.dart

@@ -5,9 +5,48 @@ import '../../core/status/status_bloc.dart';
 import '../../core/chat/chat_request_bloc.dart';
 import '../chat/widgets/incoming_request_sheet.dart';
 
-class HomeScreen extends StatelessWidget {
+class HomeScreen extends StatefulWidget {
   const HomeScreen({super.key});
 
+  @override
+  State<HomeScreen> createState() => _HomeScreenState();
+}
+
+class _HomeScreenState extends State<HomeScreen> with WidgetsBindingObserver {
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addObserver(this);
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.dispose();
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      // Check if there's a pending request that was missed while backgrounded
+      final chatState = context.read<ChatRequestBloc>().state;
+      if (chatState is ChatRequestIncoming) {
+        _showIncomingRequest(chatState.sessionId);
+      }
+    }
+  }
+
+  void _showIncomingRequest(String sessionId) {
+    showModalBottomSheet(
+      context: context,
+      isDismissible: false,
+      builder: (_) => BlocProvider.value(
+        value: context.read<ChatRequestBloc>(),
+        child: IncomingRequestSheet(sessionId: sessionId),
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return MultiBlocListener(
@@ -24,14 +63,7 @@ class HomeScreen extends StatelessWidget {
         BlocListener<ChatRequestBloc, ChatRequestState>(
           listener: (context, state) {
             if (state is ChatRequestIncoming) {
-              showModalBottomSheet(
-                context: context,
-                isDismissible: false,
-                builder: (_) => BlocProvider.value(
-                  value: context.read<ChatRequestBloc>(),
-                  child: IncomingRequestSheet(sessionId: state.sessionId),
-                ),
-              );
+              _showIncomingRequest(state.sessionId);
             } else if (state is ChatRequestAccepted) {
               ScaffoldMessenger.of(context).showSnackBar(
                 const SnackBar(content: Text('Sesi baru diterima!')),