feat: replace Projects tab with More bottom sheet (news/calendar stubs)

lib/app.dart

@@ -154,12 +154,26 @@ final routerProvider = Provider<GoRouter>((ref) {
             path: Routes.conversations,
             builder: (_, _) => const ConversationsTabScreen(),
           ),
-          GoRoute(
-            path: Routes.projects,
-            builder: (_, _) => const ProjectsScreen(),
-          ),
         ],
       ),
+      GoRoute(
+        path: Routes.projects,
+        builder: (_, _) => const ProjectsScreen(),
+      ),
+      GoRoute(
+        path: Routes.news,
+        builder: (_, _) => Scaffold(
+          appBar: AppBar(title: const Text('News')),
+          body: const Center(child: Text('News — coming soon')),
+        ),
+      ),
+      GoRoute(
+        path: Routes.calendar,
+        builder: (_, _) => Scaffold(
+          appBar: AppBar(title: const Text('Calendar')),
+          body: const Center(child: Text('Calendar — coming soon')),
+        ),
+      ),
     ],
   );
 });
@@ -177,7 +191,6 @@ class _ShellState extends ConsumerState<_Shell> {
     Routes.briefing,
     Routes.knowledge,
     Routes.conversations,
-    Routes.projects,
   ];
 
   @override
@@ -210,9 +223,51 @@ class _ShellState extends ConsumerState<_Shell> {
     for (var i = 0; i < _tabs.length; i++) {
       if (location.startsWith(_tabs[i])) return i;
     }
+    if (location.startsWith(Routes.projects) ||
+        location.startsWith(Routes.news) ||
+        location.startsWith(Routes.calendar)) {
+      return 3;
+    }
     return 0;
   }
 
+  void _showMoreSheet(BuildContext context) {
+    showModalBottomSheet<void>(
+      context: context,
+      builder: (_) => SafeArea(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            ListTile(
+              leading: const Icon(Icons.folder_outlined),
+              title: const Text('Projects'),
+              onTap: () {
+                Navigator.pop(context);
+                context.push(Routes.projects);
+              },
+            ),
+            ListTile(
+              leading: const Icon(Icons.newspaper_outlined),
+              title: const Text('News'),
+              onTap: () {
+                Navigator.pop(context);
+                context.push(Routes.news);
+              },
+            ),
+            ListTile(
+              leading: const Icon(Icons.calendar_month_outlined),
+              title: const Text('Calendar'),
+              onTap: () {
+                Navigator.pop(context);
+                context.push(Routes.calendar);
+              },
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
   void _showUpdateDialog(UpdateState update) {
     showDialog<void>(
       context: context,
@@ -303,7 +358,13 @@ class _ShellState extends ConsumerState<_Shell> {
                   children: [
                     NavigationRail(
                       selectedIndex: index,
-                      onDestinationSelected: (i) => context.go(_tabs[i]),
+                      onDestinationSelected: (i) {
+                        if (i == 3) {
+                          _showMoreSheet(context);
+                        } else {
+                          context.go(_tabs[i]);
+                        }
+                      },
                       labelType: NavigationRailLabelType.all,
                       destinations: const [
                         NavigationRailDestination(
@@ -322,9 +383,9 @@ class _ShellState extends ConsumerState<_Shell> {
                           label: Text('Chat'),
                         ),
                         NavigationRailDestination(
-                          icon: Icon(Icons.folder_outlined),
-                          selectedIcon: Icon(Icons.folder),
-                          label: Text('Projects'),
+                          icon: Icon(Icons.more_horiz_outlined),
+                          selectedIcon: Icon(Icons.more_horiz),
+                          label: Text('More'),
                         ),
                       ],
                     ),
@@ -354,7 +415,13 @@ class _ShellState extends ConsumerState<_Shell> {
       ),
       bottomNavigationBar: NavigationBar(
         selectedIndex: index,
-        onDestinationSelected: (i) => context.go(_tabs[i]),
+        onDestinationSelected: (i) {
+          if (i == 3) {
+            _showMoreSheet(context);
+          } else {
+            context.go(_tabs[i]);
+          }
+        },
         destinations: const [
           NavigationDestination(
             icon: Icon(Icons.wb_sunny_outlined),
@@ -372,9 +439,9 @@ class _ShellState extends ConsumerState<_Shell> {
             label: 'Chat',
           ),
           NavigationDestination(
-            icon: Icon(Icons.folder_outlined),
-            selectedIcon: Icon(Icons.folder),
-            label: 'Projects',
+            icon: Icon(Icons.more_horiz_outlined),
+            selectedIcon: Icon(Icons.more_horiz),
+            label: 'More',
           ),
         ],
       ),

lib/core/constants.dart

@@ -17,5 +17,7 @@ abstract class Routes {
   static const quickCapture = '/quick-capture';
   static const settings = '/settings';
   static const briefing = '/briefing';
+  static const news = '/news';
+  static const calendar = '/calendar';
   static const projectTasks = '/projects/:id/tasks';
 }