fix : 新增企业按钮无效，日期时间缺少时区

lib/app/core/extensions/datetime_extension.dart

@@ -4,7 +4,7 @@ import 'package:intl/intl.dart';
 extension DateTimeFormatting on DateTime {
   /// 格式化为 'yyyy-MM-dd HH:mm:ss'
   String toDateTimeString() {
-    return DateFormat('yyyy-MM-dd HH:mm:ss').format(this);
+    return DateFormat('yyyy-MM-dd HH:mm:ss').format(toLocal());
   }
 
   String toDateTimeString2() {

lib/app/features/problem/presentation/controllers/problem_form_controller.dart

@@ -7,6 +7,7 @@ import 'package:path/path.dart' as path;
 import 'package:permission_handler/permission_handler.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:problem_check_system/app/core/models/form_mode.dart';
+import 'package:problem_check_system/app/core/routes/app_routes.dart';
 import 'package:problem_check_system/app/features/enterprise/domain/entities/enterprise.dart';
 import 'package:problem_check_system/app/features/enterprise/domain/usecases/get_enterprises_usecase.dart';
 import 'dart:io';
@@ -324,6 +325,25 @@ class ProblemFormController extends GetxController {
     }
   }
 
+  /// 导航到新增表单页面
+  Future<void> navigateToAddForm() async {
+    final result = await Get.toNamed(
+      AppRoutes.enterpriseForm,
+      arguments: {'mode': FormMode.add},
+    );
+    if (result == true) {
+      _fetchEnterprises();
+      Get.snackbar(
+        '成功',
+        '企业信息已创建',
+        backgroundColor: Colors.green[600],
+        colorText: Colors.white,
+        icon: const Icon(Icons.check_circle, color: Colors.white),
+        duration: const Duration(seconds: 3),
+      );
+    }
+  }
+
   // 检查表单是否有更改
   bool _hasFormChanges() {
     if (problem == null) {

lib/app/features/problem/presentation/pages/problem_form_page.dart

@@ -512,7 +512,9 @@ class ProblemFormPage extends GetView<ProblemFormController> {
         ),
         // 右侧的按钮
         ElevatedButton(
-          onPressed: () {},
+          onPressed: () {
+            controller.navigateToAddForm();
+          },
           style: ElevatedButton.styleFrom(
             backgroundColor: const Color(0xFF42A5F5),
             foregroundColor: Colors.white,