feat: wire News route to NewsScreen

lib/app.dart

@@ -26,6 +26,7 @@ import 'screens/projects/project_edit_screen.dart';
 import 'screens/projects/projects_screen.dart';
 import 'screens/notes/note_edit_screen.dart';
 import 'screens/settings/settings_screen.dart';
+import 'screens/news/news_screen.dart';
 import 'screens/setup/setup_screen.dart';
 import 'screens/splash/splash_screen.dart';
 import 'screens/tasks/task_edit_screen.dart';
@@ -162,10 +163,7 @@ final routerProvider = Provider<GoRouter>((ref) {
       ),
       GoRoute(
         path: Routes.news,
-        builder: (_, _) => Scaffold(
-          appBar: AppBar(title: const Text('News')),
-          body: const Center(child: Text('News — coming soon')),
-        ),
+        builder: (_, _) => const NewsScreen(),
       ),
       GoRoute(
         path: Routes.calendar,