feat: implement V1 flow gaps — dispute, invoice, countdown, UI polish

lib/core/app_routes.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 
@@ -189,7 +188,7 @@ final GoRouter appRouter = GoRouter(
     ),
     GoRoute(
       path: AppRoute.relays,
-      builder: (_, __) => const _Stub('Relays'),
+      redirect: (_, __) => AppRoute.settings,
     ),
     GoRoute(
       path: AppRoute.walletSettings,
@@ -228,20 +227,3 @@ final GoRouter appRouter = GoRouter(
   ],
 );
 
-// ── Placeholder screen ─────────────────────────────────────────────────────────
-
-class _Stub extends StatelessWidget {
-  const _Stub(this.name);
-
-  final String name;
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text(name)),
-      body: Center(
-        child: Text(name, style: Theme.of(context).textTheme.bodyLarge),
-      ),
-    );
-  }
-}

lib/features/chat/screens/chat_rooms_screen.dart

@@ -9,24 +9,41 @@ import 'package:mostro/features/chat/widgets/chat_list_item.dart';
 import 'package:mostro/features/disputes/widgets/disputes_list.dart';
 import 'package:mostro/features/drawer/screens/drawer_menu.dart';
 import 'package:mostro/shared/widgets/bottom_nav_bar.dart';
+import 'package:mostro/shared/widgets/notification_bell.dart';
 
 /// Route: /chat_list
 ///
 /// Top-level chat screen with two tabs: Messages and Disputes.
-class ChatRoomsScreen extends ConsumerWidget {
+class ChatRoomsScreen extends StatefulWidget {
   const ChatRoomsScreen({super.key});
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
+  State<ChatRoomsScreen> createState() => _ChatRoomsScreenState();
+}
+
+class _ChatRoomsScreenState extends State<ChatRoomsScreen> {
+  bool _drawerOpen = false;
+
+  @override
+  Widget build(BuildContext context) {
     final colors = Theme.of(context).extension<AppColors>();
     if (colors == null) throw StateError('AppColors theme extension must be registered');
     final textTheme = Theme.of(context).textTheme;
+    final green = colors.mostroGreen;
 
     final isDesktop =
         MediaQuery.sizeOf(context).width >= AppBreakpoints.desktop;
 
     final mainContent = Column(
       children: [
+        if (!isDesktop)
+          SafeArea(
+            bottom: false,
+            child: _ChatAppBar(
+              green: green,
+              onMenuTap: () => setState(() => _drawerOpen = true),
+            ),
+          ),
         TabBar(
           indicatorColor: colors.mostroGreen,
           labelColor: colors.mostroGreen,
@@ -55,21 +72,59 @@ class ChatRoomsScreen extends ConsumerWidget {
               Expanded(child: SafeArea(child: mainContent)),
             ],
           )
-        : mainContent;
+        : Stack(
+            children: [
+              mainContent,
+              if (_drawerOpen)
+                DrawerMenu(
+                  onClose: () => setState(() => _drawerOpen = false),
+                ),
+            ],
+          );
 
     return DefaultTabController(
       length: 2,
       child: Scaffold(
-        appBar: isDesktop
-            ? null
-            : AppBar(title: const Text('Chat')),
         body: body,
         bottomNavigationBar: const BottomNavBar(),
       ),
     );
   }
 }
 
+// ── Mobile app bar ─────────────────────────────────────────────────────────────
+
+class _ChatAppBar extends StatelessWidget {
+  const _ChatAppBar({required this.green, required this.onMenuTap});
+
+  final Color green;
+  final VoidCallback onMenuTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(
+        horizontal: AppSpacing.sm,
+        vertical: AppSpacing.xs,
+      ),
+      child: Row(
+        children: [
+          IconButton(
+            onPressed: onMenuTap,
+            icon: const Icon(Icons.menu, size: 24),
+            tooltip: 'Menu',
+          ),
+          const Spacer(),
+          Icon(Icons.psychology, size: 28, color: green),
+          const Spacer(),
+          const NotificationBell(),
+          const SizedBox(width: AppSpacing.sm),
+        ],
+      ),
+    );
+  }
+}
+
 // ── Messages tab ──────────────────────────────────────────────────────────────
 
 class _MessagesTab extends ConsumerWidget {