Fix API compatibility and add user/role/permission and asset import/export

backend_new/start.bat

@@ -0,0 +1,63 @@
+@echo off
+REM 资产管理系统后端启动脚本 (Windows)
+
+echo ====================================
+echo 资产管理系统后端服务
+echo ====================================
+echo.
+
+REM 检查Python环境
+python --version >nul 2>&1
+if %errorlevel% neq 0 (
+    echo [错误] 未找到Python环境，请先安装Python 3.10+
+    pause
+    exit /b 1
+)
+
+REM 检查虚拟环境
+if not exist "venv\" (
+    echo [信息] 虚拟环境不存在，正在创建...
+    python -m venv venv
+    echo [成功] 虚拟环境创建完成
+)
+
+REM 激活虚拟环境
+echo [信息] 激活虚拟环境...
+call venv\Scripts\activate.bat
+
+REM 检查依赖
+echo [信息] 检查依赖...
+pip show fastapi >nul 2>&1
+if %errorlevel% neq 0 (
+    echo [信息] 正在安装依赖...
+    pip install -r requirements.txt
+)
+
+REM 检查环境变量文件
+if not exist ".env" (
+    echo [警告] .env文件不存在，正在从示例创建...
+    copy .env.example .env
+    echo [警告] 请编辑.env文件配置数据库连接等信息
+    pause
+)
+
+REM 创建必要的目录
+if not exist "logs\" mkdir logs
+if not exist "uploads\qrcodes\" mkdir uploads\qrcodes
+if not exist "uploads\avatars\" mkdir uploads\avatars
+if not exist "uploads\documents\" mkdir uploads\documents
+
+echo.
+echo ====================================
+echo 启动开发服务器...
+echo ====================================
+echo.
+echo API文档地址: http://localhost:8000/docs
+echo ReDoc文档地址: http://localhost:8000/redoc
+echo 按 Ctrl+C 停止服务
+echo.
+
+REM 启动服务
+python run.py
+
+pause