fix: start.bat pip安装抑制警告避免误判失败，报错信息区分venv/no-venv

start.bat

@@ -71,9 +71,13 @@ if exist "config\framework\base_config.yaml" (
 echo.
 if %FAIL% gtr 0 (
     echo [WARN] %FAIL% 项缺失，自动安装...
-    "%PYTHON%" -m pip install -r requirements.txt
+    "%PYTHON%" -m pip install -r requirements.txt --no-warn-script-location --root-user-action=ignore 2>&1
     if %errorlevel% neq 0 (
+        if %NO_VENV% equ 1 (
+            echo [FAIL] 安装失败，请手动执行: pip install -r requirements.txt
+        ) else (
             echo [FAIL] 安装失败，请手动执行: .venv\Scripts\pip install -r requirements.txt
+        )
         pause
         exit /b 1
     )