From 9375a78d6332cd72219d521bc2baad38f7255eed Mon Sep 17 00:00:00 2001
From: caadiq <caadiq@gmail.com>
Date: Sat, 4 Apr 2026 13:47:26 +0900
Subject: [PATCH] =?UTF-8?q?feat(app):=20=EB=92=A4=EB=A1=9C=EA=B0=80?=
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메인 화면에서 뒤로가기 1회 → '한 번 더 누르면 앱이 종료됩니다' 스낵바
2초 내 다시 누르면 앱 종료

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 app/android/app/src/main/AndroidManifest.xml |  3 +-
 app/lib/views/main_shell.dart                | 34 ++++++++++++++++++--
 2 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/app/android/app/src/main/AndroidManifest.xml b/app/android/app/src/main/AndroidManifest.xml
index 916113f..b4762b6 100644
--- a/app/android/app/src/main/AndroidManifest.xml
+++ b/app/android/app/src/main/AndroidManifest.xml
@@ -17,7 +17,8 @@
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize">
+            android:windowSoftInputMode="adjustResize"
+            android:enableOnBackInvokedCallback="false">
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues
diff --git a/app/lib/views/main_shell.dart b/app/lib/views/main_shell.dart
index cc3a67d..4b66211 100644
--- a/app/lib/views/main_shell.dart
+++ b/app/lib/views/main_shell.dart
@@ -2,23 +2,52 @@
 library;
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:go_router/go_router.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 import '../core/constants.dart';
 
 /// 메인 앱 셸 (툴바 + 바텀 네비게이션 + 콘텐츠)
-class MainShell extends StatelessWidget {
+class MainShell extends StatefulWidget {
   final Widget child;
 
   const MainShell({super.key, required this.child});
 
+  @override
+  State<MainShell> createState() => _MainShellState();
+}
+
+class _MainShellState extends State<MainShell> {
+  DateTime? _lastBackPressed;
+
   @override
   Widget build(BuildContext context) {
+    final child = widget.child;
     final location = GoRouterState.of(context).uri.path;
     final isMembersPage = location == '/members';
     final isSchedulePage = location.startsWith('/schedule');
 
-    return Scaffold(
+    return PopScope(
+      canPop: false,
+      onPopInvokedWithResult: (bool didPop, dynamic result) {
+        if (didPop) return;
+
+        final now = DateTime.now();
+        if (_lastBackPressed != null &&
+            now.difference(_lastBackPressed!) < const Duration(seconds: 2)) {
+          SystemNavigator.pop();
+        } else {
+          _lastBackPressed = now;
+          ScaffoldMessenger.of(context).showSnackBar(
+            const SnackBar(
+              content: Text('한 번 더 누르면 앱이 종료됩니다'),
+              duration: Duration(seconds: 2),
+              behavior: SnackBarBehavior.floating,
+            ),
+          );
+        }
+      },
+      child: Scaffold(
       backgroundColor: AppColors.background,
       // 앱바 (툴바) - 일정 페이지는 자체 툴바 사용, 멤버 페이지는 그림자 제거
       appBar: isSchedulePage
@@ -60,6 +89,7 @@ class MainShell extends StatelessWidget {
       body: child,
       // 바텀 네비게이션
       bottomNavigationBar: const _BottomNavBar(),
+      ),
     );
   }