Update README and project cleanup

start.bat

@@ -0,0 +1,25 @@
+@echo off
+echo [DMP] 正在启动系统...
+echo [DMP] 检查环境...
+where node >nul 2>nul
+if %errorlevel% neq 0 (
+    echo [ERROR] 未找到 Node.js，请先安装 Node.js!
+    pause
+    exit /b
+)
+
+if not exist "node_modules" (
+    echo [DMP] 正在安装依赖...
+    call npm install
+)
+
+if not exist "dmp_onion.db" (
+    echo [DMP] 正在初始化演示数据库...
+    node db/seed.js
+    node db/seed_openai.js
+)
+
+echo [DMP] 启动服务器...
+start "" http://localhost:3456
+node server.js
+pause