Harden Windows service supervision

run.bat

@@ -7,7 +7,7 @@ cd /d "%~dp0"
 REM 检查 .venv 是否存在
 if not exist ".venv\Scripts\activate.bat" (
     echo [ERROR] 未找到 .venv\Scripts\activate.bat
-    pause
+    if not defined DOCUTRANSLATE_NONINTERACTIVE pause
     exit /b 1
 )
 
@@ -29,7 +29,7 @@ call deactivate >nul 2>nul
 if not "%EXIT_CODE%"=="0" (
     echo.
     echo [ERROR] 程序退出，返回码: %EXIT_CODE%
-    pause
+    if not defined DOCUTRANSLATE_NONINTERACTIVE pause
 )
 
 exit /b %EXIT_CODE%