fix: resolve quoting issue in start_all.bat frontend launch, add node_modules check

start_all.bat

@@ -32,7 +32,15 @@ echo    :8000 就绪
 
 :: 3. 前端
 echo [3/3] 前端 :5173
-start "jrxml-frontend" /MIN cmd /c "cd /d "%~dp0frontend" && npm run dev"
+if not exist "%~dp0frontend\node_modules" (
+    echo    [安装] node_modules 不存在，正在 npm install...
+    cd /d "%~dp0frontend"
+    call npm install
+    cd /d "%~dp0"
+)
+cd /d "%~dp0frontend"
+start "jrxml-frontend" /MIN cmd /c "npm run dev"
+cd /d "%~dp0"
 :wait_fe
 ping -n 3 127.0.0.1 >nul
 powershell -Command "try{$r=Invoke-WebRequest -Uri http://localhost:5173 -TimeoutSec 3 -UseBasicParsing;exit 0}catch{exit 1}" >nul 2>&1