fix: null->0 for parent_id/sort NOT NULL columns; prevent DB constraint violation

backend/app/Http/Controllers/Admin/System/DepartmentController.php

@@ -28,6 +28,8 @@ class DepartmentController extends Controller
             'status' => 'in:0,1',
         ]);
 
+        $data['parent_id'] = $data['parent_id'] ?? 0;
+        $data['sort'] = $data['sort'] ?? 0;
         $data['store_id'] = $data['store_id'] ?? auth()->user()->store_id;
         $department = Department::create($data);
         return $this->success($department, '创建成功');

backend/app/Http/Controllers/Admin/System/DictionaryController.php

@@ -49,6 +49,7 @@ class DictionaryController extends Controller
         ]);
 
         $data['dictionary_id'] = $dictionary->id;
+        $data['sort'] = $data['sort'] ?? 0;
         $item = DictionaryItem::create($data);
         return $this->success($item, '创建成功');
     }

backend/app/Http/Controllers/Admin/System/MenuController.php

@@ -32,6 +32,8 @@ class MenuController extends Controller
             'status' => 'in:0,1',
         ]);
 
+        $data['parent_id'] = $data['parent_id'] ?? 0;
+        $data['sort'] = $data['sort'] ?? 0;
         $menu = Menu::create($data);
         return $this->success($menu, '创建成功');
     }

backend/app/Http/Controllers/Admin/System/PermissionController.php

@@ -29,6 +29,8 @@ class PermissionController extends Controller
             'sort' => 'nullable|integer',
         ]);
 
+        $data['parent_id'] = $data['parent_id'] ?? 0;
+        $data['sort'] = $data['sort'] ?? 0;
         $permission = Permission::create($data);
         return $this->success($permission, '创建成功');
     }

backend/app/Http/Controllers/Admin/System/PositionController.php

@@ -25,6 +25,7 @@ class PositionController extends Controller
         ]);
 
         $data['store_id'] = auth()->user()->store_id;
+        $data['sort'] = $data['sort'] ?? 0;
         $position = Position::create($data);
         return $this->success($position, '创建成功');
     }