feat: start.bat支持--no-venv跳过虚拟环境使用系统Python

start.bat

@@ -11,9 +11,22 @@ echo.
 set PASS=0
 set FAIL=0
 
-:: ── Python (venv) ──
-set PYTHON=%~dp0.venv\Scripts\python.exe
-if not exist "%PYTHON%" (echo   [FAIL] .venv 未创建，请先运行: python -m venv .venv ^&^& .venv\Scripts\pip install -r requirements.txt & pause & exit /b 1)
+:: ── 检查 --no-venv 参数 ──
+set NO_VENV=0
+echo %* | findstr /i "\-\-no-venv" >nul && set NO_VENV=1
+
+:: ── Python ──
+if %NO_VENV% equ 1 (
+    set PYTHON=python
+    echo   [INFO] --no-venv: 使用系统 Python
+) else (
+    set PYTHON=%~dp0.venv\Scripts\python.exe
+    if not exist "%PYTHON%" (
+        echo   [FAIL] .venv 未创建，请先运行: python -m venv .venv ^&^& .venv\Scripts\pip install -r requirements.txt
+        echo   或使用: start.bat --no-venv 跳过虚拟环境
+        pause & exit /b 1
+    )
+)
 "%PYTHON%" --version >nul 2>&1
 if %errorlevel% equ 0 (
     echo   [OK] Python