Flutter 앱 골격 · 5탭 네비게이션 · 로그인 화면 · Firestore 보안 규칙·인덱스

app/lib/app.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+import 'core/router/app_router.dart';
+import 'core/theme/app_theme.dart';
+import 'features/auth/auth_repository.dart';
+
+/// MaterialApp + 라우터 + 테마 주입.
+class FancakeApp extends StatefulWidget {
+  const FancakeApp({super.key, required this.auth});
+
+  final AuthRepository auth;
+
+  @override
+  State<FancakeApp> createState() => _FancakeAppState();
+}
+
+class _FancakeAppState extends State<FancakeApp> {
+  late final GoRouter _router = buildRouter(widget.auth);
+
+  @override
+  Widget build(BuildContext context) => MaterialApp.router(
+    title: 'Fancake',
+    debugShowCheckedModeBanner: false,
+    theme: buildAppTheme(),
+    // 코스믹 다크가 유일한 서피스다(결정 D-19). 라이트 테마를 두지 않는다.
+    themeMode: ThemeMode.dark,
+    darkTheme: buildAppTheme(),
+    routerConfig: _router,
+  );
+}