회원가입 Descope 비밀번호 정책 동기화

frontend/lib/features/auth/presentation/signup_screen.dart

@@ -35,6 +35,8 @@ class _SignupScreenState extends State<SignupScreen> {
   bool _termsAccepted = false;
   bool _privacyAccepted = false;
   bool _isLoading = false;
+  Map<String, dynamic>? _policy;
+  bool _isPolicyLoading = false;
 
   // Inline Errors
   String? _emailError;
@@ -58,6 +60,24 @@ class _SignupScreenState extends State<SignupScreen> {
     'baroncs.co.kr': 'BARON',
   };
 
+  @override
+  void initState() {
+    super.initState();
+    _loadPolicy();
+  }
+
+  Future<void> _loadPolicy() async {
+    setState(() => _isPolicyLoading = true);
+    try {
+      final policy = await AuthProxyService.fetchPasswordPolicy();
+      if (mounted) setState(() => _policy = policy);
+    } catch (_) {
+      // Ignore errors, will use defaults
+    } finally {
+      if (mounted) setState(() => _isPolicyLoading = false);
+    }
+  }
+
   @override
   void dispose() {
     _emailTimer?.cancel();
@@ -757,13 +777,40 @@ class _SignupScreenState extends State<SignupScreen> {
     );
   }
 
+  String _buildPolicyDescription() {
+    if (_isPolicyLoading) {
+      return "비밀번호 정책을 불러오는 중입니다...";
+    }
+    final minLength = (_policy?['minLength'] as int?) ?? 8;
+    final requiresLower = _policy?['lowercase'] ?? true;
+    final requiresUpper = _policy?['uppercase'] ?? true;
+    final requiresNumber = _policy?['number'] ?? true;
+    final requiresSymbol = _policy?['nonAlphanumeric'] ?? true;
+
+    final parts = <String>["최소 $minLength자 이상"];
+    if (requiresUpper) parts.add("대문자");
+    if (requiresLower) parts.add("소문자");
+    if (requiresNumber) parts.add("숫자");
+    if (requiresSymbol) parts.add("특수문자");
+
+    return "보안 정책: ${parts.join(', ')}를 각각 최소 1자 이상 포함해야 합니다.";
+  }
+
   Widget _buildStepPassword() {
     String p = _passwordController.text;
-    bool hasUpper = p.contains(RegExp(r'[A-Z]'));
-    bool hasLower = p.contains(RegExp(r'[a-z]'));
-    bool hasDigit = p.contains(RegExp(r'[0-9]'));
-    bool hasSpecial = p.contains(RegExp(r'[!@#$%^&*(),.?":{}|<>]'));
-    bool hasLength = p.length >= 12;
+    
+    // Default Policy Fallback
+    final minLength = (_policy?['minLength'] as int?) ?? 8;
+    final requiresLower = _policy?['lowercase'] ?? true;
+    final requiresUpper = _policy?['uppercase'] ?? true;
+    final requiresNumber = _policy?['number'] ?? true;
+    final requiresSymbol = _policy?['nonAlphanumeric'] ?? true;
+
+    bool hasLength = p.length >= minLength;
+    bool hasUpper = !requiresUpper || p.contains(RegExp(r'[A-Z]'));
+    bool hasLower = !requiresLower || p.contains(RegExp(r'[a-z]'));
+    bool hasDigit = !requiresNumber || p.contains(RegExp(r'[0-9]'));
+    bool hasSpecial = !requiresSymbol || p.contains(RegExp(r'[!@#$%^&*(),.?":{}|<>]'));
 
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
@@ -780,7 +827,7 @@ class _SignupScreenState extends State<SignupScreen> {
               const SizedBox(width: 10),
               Expanded(
                 child: Text(
-                  '보안 정책: 12자 이상, 대문자/소문자/숫자/특수문자를 각각 최소 1자 이상 포함해야 합니다.',
+                  _buildPolicyDescription(),
                   style: TextStyle(fontSize: 12, color: Colors.blue[800], fontWeight: FontWeight.w500),
                 ),
               ),
@@ -802,11 +849,11 @@ class _SignupScreenState extends State<SignupScreen> {
         Wrap(
           spacing: 10,
           children: [
-            _cryptoCheck('12자 이상', hasLength),
-            _cryptoCheck('대문자', hasUpper),
-            _cryptoCheck('소문자', hasLower),
-            _cryptoCheck('숫자', hasDigit),
-            _cryptoCheck('특수문자', hasSpecial),
+            _cryptoCheck('$minLength자 이상', hasLength),
+            if (requiresUpper) _cryptoCheck('대문자', hasUpper),
+            if (requiresLower) _cryptoCheck('소문자', hasLower),
+            if (requiresNumber) _cryptoCheck('숫자', hasDigit),
+            if (requiresSymbol) _cryptoCheck('특수문자', hasSpecial),
           ],
         ),
         const SizedBox(height: 16),