SMS 인증 코드 발송 및 검증 UI/로직 연동

frontend/lib/core/services/auth_proxy_service.dart

@@ -74,6 +74,25 @@ class AuthProxyService {
     }
   }
 
+  static Future<Map<String, dynamic>> verifySmsCode(String phoneNumber, String code) async {
+    final url = Uri.parse('$_baseUrl/api/v1/auth/verify-sms');
+    
+    final response = await http.post(
+      url,
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({
+        'phoneNumber': phoneNumber,
+        'code': code,
+      }),
+    );
+
+    if (response.statusCode == 200) {
+      return jsonDecode(response.body);
+    } else {
+      throw Exception('Failed to verify code: ${response.body}');
+    }
+  }
+
   static Future<void> logError(String message) async {
     final url = Uri.parse('$_baseUrl/api/v1/client-log');
     try {