[TAS-250] SnackBarの共通化

lib/core/widgets/common_snack_bar.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/material.dart';
+
+/// 共通SnackBar
+class CommonSnackBar extends SnackBar {
+  CommonSnackBar._({
+    required String message,
+    super.action,
+  }) : super(
+          content: Text(message),
+          behavior: SnackBarBehavior.floating,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(8),
+          ),
+        );
+
+  static void show(
+    BuildContext context, {
+    required String message,
+    String? actionLabel,
+    VoidCallback? onActionPressed,
+  }) {
+    final action = actionLabel != null && onActionPressed != null
+        ? SnackBarAction(
+            label: actionLabel,
+            onPressed: onActionPressed,
+          )
+        : null;
+
+    ScaffoldMessenger.of(context).showSnackBar(
+      CommonSnackBar._(message: message, action: action),
+    );
+  }
+}

lib/features/auth/my_page.dart

@@ -1,7 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+import '../../core/widgets/common_snack_bar.dart';
 import '../../core/widgets/confirm_dialog.dart';
-import '../../core/widgets/success_snack_bar.dart';
 import 'auth_controller.dart';
 
 /// マイページ
@@ -34,7 +35,7 @@ class MyPage extends ConsumerWidget {
                               .read(authControllerProvider)
                               .deleteUserAccount();
                           if (context.mounted) {
-                            SuccessSnackBar.show(
+                            CommonSnackBar.show(
                               context,
                               message: 'アカウントを削除しました',
                             );

lib/features/auth/sign_in_page.dart

@@ -7,6 +7,7 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 // TODO(kim): アナリティクスマージ後にコメントアウトを解除
 // import '../../core/analytics/analytics_service.dart';
 import '../../core/themes.dart';
+import '../../core/widgets/common_snack_bar.dart';
 import '../photo/swipe_photo/swipe_photo_page.dart';
 import 'auth_controller.dart';
 
@@ -116,19 +117,9 @@ class SignInPage extends HookConsumerWidget {
       }
       GoRouter.of(context).go(SwipePhotoPage.routePath);
     } on Exception catch (e) {
-      _showSnackBar(context, 'サインインに失敗しました: $e');
+      CommonSnackBar.show(context, message: 'サインインに失敗しました: $e');
     } finally {
       isLoading.value = false;
     }
   }
-
-  /// スナックバーの表示
-  void _showSnackBar(BuildContext context, String message) {
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: Text(message),
-        backgroundColor: Colors.black,
-      ),
-    );
-  }
 }

lib/features/photo/camera/camera_page.dart

@@ -6,6 +6,7 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:permission_handler/permission_handler.dart';
 
 import '../../../core/build_context_extension.dart';
+import '../../../core/widgets/common_snack_bar.dart';
 import 'camera_controller.dart';
 import 'camera_detail_page.dart';
 
@@ -92,16 +93,11 @@ class CameraPage extends HookConsumerWidget {
                                         .takePictureAndSave(context);
                                     if (!isCaptureSuccessful &&
                                         context.mounted) {
-                                      ScaffoldMessenger.of(context)
-                                          .showSnackBar(
-                                        const SnackBar(
-                                          content:
-                                              Text('設定画面で権限を全て許可に設定してください。'),
-                                          action: SnackBarAction(
-                                            label: '設定を開く',
-                                            onPressed: openAppSettings,
-                                          ),
-                                        ),
+                                      CommonSnackBar.show(
+                                        context,
+                                        message: '設定画面で権限を全て許可に設定してください。',
+                                        actionLabel: '設定を開く',
+                                        onActionPressed: openAppSettings,
                                       );
                                       ref.invalidate(cameraStateProvider);
                                     }