fix: 上传接口缺 request 参数致 500；Excel 导入 JSONResponse 解析崩溃

- modules/upload/router.py：三个上传端点补 request: Request 参数，permission_required 可正常取到当前用户
- modules/system/level/service.py：import_level 解析 upload_file 返回的 JSONResponse body 再取 filePath，修复 Excel 导入崩溃
- 实测：uploadImage 上传成功、level 导入 7 条成功；清理测试产生的重复 level 数据

Co-Authored-By: Claude <noreply@anthropic.com>

modules/system/level/service.py

@@ -39,6 +39,7 @@
 # | 许可协议》附件为准。
 # +======================================================================
 import asyncio
+import json
 import os
 import random
 import time
@@ -173,12 +174,13 @@ def update_level_status(request, data: LevelStatusForm):
 # 导入Excel
 
 async def import_level(request, file):
-    # 读取上传的文件
+    # 读取上传的文件（upload_file 返回 JSONResponse，需解析 body 判断业务结果）
     result = await upload.upload_file(file, ".xls|.xlsx")
-    if result.get('code') != 0:
+    body = json.loads(result.body) if result.body else {}
+    if body.get('code') != 0:
         return result
     # 本地文件地址
-    relative_path = result['data']['filePath']
+    relative_path = body['data']['filePath']
     path = FASTAPI_UPLOAD_DIR + relative_path
 
     def _import():