update gen qr

lib/features/orders/data/datasources/order_remote_datasource.dart

@@ -139,19 +139,59 @@ class OrderRemoteDataSource {
       }
 
       // Extract order info from Frappe response
+      // Response format: { message: { success: true, message: "...", data: { name: "SAL-ORD-2025-00078", ... } } }
       final message = data['message'] as Map<String, dynamic>?;
       if (message == null) {
         throw Exception('No message field in createOrder response');
       }
 
+      final orderData = message['data'] as Map<String, dynamic>?;
+      if (orderData == null) {
+        throw Exception('No data field in createOrder response');
+      }
+
+      final orderId = orderData['name'] as String?;
+      if (orderId == null || orderId.isEmpty) {
+        throw Exception('No order ID (name) in createOrder response');
+      }
+
       // Return standardized response
       return {
-        'orderId': message['name'] ?? '',
-        'orderNumber': message['name'] ?? '',
-        'fullResponse': message,
+        'orderId': orderId,
+        'orderNumber': orderId,
+        'fullResponse': orderData,
       };
     } catch (e) {
       throw Exception('Failed to create order: $e');
     }
   }
+
+  /// Generate QR code for payment
+  ///
+  /// Calls: POST /api/method/building_material.building_material.api.v1.qrcode.generate
+  /// Body: { "order_id": "SAL-ORD-2025-00048" }
+  /// Returns: { "qr_code": "...", "amount": null, "transaction_id": "...", "bank_info": {...} }
+  Future<Map<String, dynamic>> generateQrCode(String orderId) async {
+    try {
+      final response = await _dioClient.post<Map<String, dynamic>>(
+        '${ApiConstants.frappeApiMethod}${ApiConstants.generateQrCode}',
+        data: {'order_id': orderId},
+      );
+
+      final data = response.data;
+      if (data == null) {
+        throw Exception('No data received from generateQrCode API');
+      }
+
+      // Extract QR code info from Frappe response
+      final message = data['message'] as Map<String, dynamic>?;
+      if (message == null) {
+        throw Exception('No message field in generateQrCode response');
+      }
+
+      return message;
+    } catch (e) {
+      throw Exception('Failed to generate QR code: $e');
+    }
+  }
 }

lib/features/orders/data/repositories/order_repository_impl.dart

@@ -56,4 +56,13 @@ class OrderRepositoryImpl implements OrderRepository {
       throw Exception('Failed to create order: $e');
     }
   }
+
+  @override
+  Future<Map<String, dynamic>> generateQrCode(String orderId) async {
+    try {
+      return await _remoteDataSource.generateQrCode(orderId);
+    } catch (e) {
+      throw Exception('Failed to generate QR code: $e');
+    }
+  }
 }