Initial backend code

start-all.bat

@@ -0,0 +1,45 @@
+@echo off
+chcp 65001 >nul
+title 权益小助手 - 一键启动脚本
+
+echo ========================================
+echo    权益小助手 - 一键启动脚本
+echo ========================================
+echo.
+
+set MONGO_HOME=D:\001_software\012_MongoDB\mongodb-win32-x86_64-windows-8.0.16
+set DATA_DIR=D:\003_Project\WeixinProject\QuanYiXiaoZhuShou\backend\mongodb\data
+set LOG_DIR=D:\003_Project\WeixinProject\QuanYiXiaoZhuShou\backend\mongodb\log
+set BACKEND_DIR=D:\003_Project\WeixinProject\QuanYiXiaoZhuShou\backend
+
+if not exist "%MONGO_HOME%\bin\mongod.exe" (
+    echo [错误] 找不到 mongod.exe，请检查 MONGO_HOME 路径
+    pause
+    exit /b 1
+)
+
+if not exist "%DATA_DIR%" mkdir "%DATA_DIR%"
+if not exist "%LOG_DIR%" mkdir "%LOG_DIR%"
+
+echo [信息] 正在启动 MongoDB 服务...
+start "MongoDB - 权益小助手" cmd /k "echo [MongoDB] 正在运行... && \"%MONGO_HOME%\bin\mongod.exe\" --dbpath \"%DATA_DIR%\" --port 27017 --bind_ip 127.0.0.1"
+
+echo [信息] 等待 MongoDB 初始化...
+timeout /t 3 /nobreak >nul
+
+echo [信息] 正在启动后端服务...
+cd /d "%BACKEND_DIR%"
+start "后端服务 - 权益小助手" cmd /k "npm start"
+
+echo.
+echo ========================================
+echo [成功] 所有服务已启动！
+echo ========================================
+echo.
+echo 服务状态:
+echo   - MongoDB:   127.0.0.1:27017
+echo   - 后端API:   http://localhost:3000
+echo   - 健康检查:  http://localhost:3000/health
+echo.
+echo 按任意键关闭此窗口（服务将继续在后台运行）
+pause >nul