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app/lib/features/auth/auth.dart

@@ -87,7 +87,7 @@ final class AuthNotConfigured extends AuthOutcome {
 
   final AuthProviderKind provider;
 
-  /// 투입해야 하는 것들(파일명·키명). 화면과 README 에 그대로 노출한다.
+  /// 투입해야 하는 것들(파일명·키명). 개발자용이라 로그·README 에만 쓰고 화면에는 내보내지 않는다.
   final List<String> missing;
 }
 

app/lib/features/auth/login_screen.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 
+import '../../core/ui/app_dialog.dart';
+
 import '../../core/firebase/firebase_boot.dart';
 import '../../core/i18n/app_locale.dart';
 import '../../core/theme/tokens.dart';
@@ -232,23 +234,11 @@ class _SimpleLoginScreenState extends State<SimpleLoginScreen> {
 
   Future<void> _showNotConfigured(AuthNotConfigured outcome) async {
     final name = outcome.provider.shortName;
-    await showDialog<void>(
-      context: context,
-      builder: (context) => AlertDialog(
-        title: Text(context.l10n.authNotConfiguredTitle(name)),
-        content: Text(
-          context.l10n.authNotConfiguredBody(
-            name,
-            outcome.missing.join('\n· '),
-          ),
-        ),
-        actions: [
-          TextButton(
-            onPressed: () => Navigator.of(context).pop(),
-            child: Text(context.l10n.commonConfirm),
-          ),
-        ],
-      ),
+    await showAlertDialog(
+      context,
+      context.l10n.authNotConfiguredTitle(name),
+      // 설정 항목(outcome.missing)은 개발자용이라 화면에 내보내지 않는다.
+      body: context.l10n.authNotConfiguredBody(name),
     );
   }
 
@@ -381,11 +371,8 @@ String? authNotice(AuthOutcome outcome, [AppLocalizations? l10n]) =>
       AuthSucceeded() => null,
       AuthCancelled() => null,
       AuthFailed(:final code, :final message) => '[$code] $message',
-      AuthNotConfigured(:final provider, :final missing) =>
-        (l10n ?? koL10n).authNotConfiguredNotice(
-          provider.shortName,
-          missing.join(' · '),
-        ),
+      AuthNotConfigured(:final provider) =>
+        (l10n ?? koL10n).authNotConfiguredNotice(provider.shortName),
     };
 
 TextStyle _abz(double size, Color color) => TextStyle(