로그인 페이지 및 기능 구현

frontend/lib/core/services/auth_proxy_service.dart

@@ -300,4 +300,89 @@ class AuthProxyService {
     
     await sendLog('ERROR', message, data: data);
   }
+
+  // --- Signup Methods ---
+
+  static Future<bool> checkEmailAvailability(String email) async {
+    final url = Uri.parse('$_baseUrl/api/v1/auth/signup/check-email');
+    final response = await http.post(
+      url,
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({'email': email}),
+    );
+
+    if (response.statusCode == 200) {
+      final data = jsonDecode(response.body);
+      return data['available'] ?? false;
+    }
+    return false;
+  }
+
+  static Future<void> sendSignupCode(String target, String type) async {
+    final path = type == 'email' ? 'send-email-code' : 'send-sms-code';
+    final url = Uri.parse('$_baseUrl/api/v1/auth/signup/$path');
+    
+    final response = await http.post(
+      url,
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({'target': target}),
+    );
+
+    if (response.statusCode != 200) {
+      throw Exception('Failed to send code: ${response.body}');
+    }
+  }
+
+  static Future<bool> verifySignupCode(String target, String type, String code) async {
+    final url = Uri.parse('$_baseUrl/api/v1/auth/signup/verify-code');
+    
+    final response = await http.post(
+      url,
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({
+        'target': target,
+        'type': type,
+        'code': code,
+      }),
+    );
+
+    if (response.statusCode == 200) {
+      final data = jsonDecode(response.body);
+      return data['success'] ?? false;
+    }
+    return false;
+  }
+
+  static Future<void> signup({
+    required String email,
+    required String password,
+    required String name,
+    required String phone,
+    required String affiliationType,
+    String? companyCode,
+    required String department,
+    required bool termsAccepted,
+  }) async {
+    final url = Uri.parse('$_baseUrl/api/v1/auth/signup');
+    
+    final response = await http.post(
+      url,
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({
+        'email': email,
+        'password': password,
+        'name': name,
+        'phone': phone,
+        'affiliationType': affiliationType,
+        if (companyCode != null) 'companyCode': companyCode,
+        'department': department,
+        'termsAccepted': termsAccepted,
+      }),
+    );
+
+    if (response.statusCode != 200) {
+      final error = jsonDecode(response.body)['error'] ?? 'Signup failed';
+      throw Exception(error);
+    }
+  }
 }