Initial commit: Tagesbyte prototype

Flutter app that collects daily tech news from German and English RSS/Atom
feeds, with a reader view, AI article summaries and daily briefings (Claude
API or n8n webhook), paywall/sponsored filtering and ad/consent blocking.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/main.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import 'services/storage.dart';
+import 'state/app_state.dart';
+import 'ui/common.dart';
+import 'ui/home_shell.dart';
+
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  // Portrait only; also set in AndroidManifest.xml and Info.plist.
+  await SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
+  final state = AppState(await Storage.open());
+  runApp(DailyTechNewsApp(state: state));
+  state.init();
+}
+
+class DailyTechNewsApp extends StatelessWidget {
+  const DailyTechNewsApp({super.key, required this.state});
+
+  final AppState state;
+
+  static const _seed = Color(0xFF3355DD);
+
+  @override
+  Widget build(BuildContext context) {
+    ThemeData theme(Brightness brightness) => ThemeData(
+          colorScheme: ColorScheme.fromSeed(seedColor: _seed, brightness: brightness),
+          cardTheme: const CardThemeData(margin: EdgeInsets.zero),
+        );
+
+    // Rebuild when the theme setting changes; everything else listens itself.
+    return ListenableBuilder(
+      listenable: state,
+      builder: (context, _) => MaterialApp(
+        title: appName,
+        debugShowCheckedModeBanner: false,
+        theme: theme(Brightness.light),
+        darkTheme: theme(Brightness.dark),
+        themeMode: state.settings.themeMode,
+        home: HomeShell(state: state),
+      ),
+    );
+  }
+}