fix: ethend.bat 端口占用时询问用户是否Kill旧进程

ethend.bat

@@ -122,11 +122,18 @@ if %ERRORLEVEL%==0 (
     exit /b 0
 )
 
-:: Free port
+:: Check port conflict and ask user
 for /f "tokens=5" %%a in ('netstat -ano ^| findstr /R ":%ETHEND_PORT% " ^| findstr "LISTENING"') do (
-    echo [WARN] Port %ETHEND_PORT% in use by PID %%a, releasing...
+    echo.
+    echo [WARN] Port %ETHEND_PORT% is in use by PID %%a.
+    set /p CHOICE="Kill old process and restart? [Y/n]: "
+    if /i "!CHOICE!"=="n" (
+        echo [INFO] Aborted by user.
+        exit /b 0
+    )
+    echo [INFO] Killing PID %%a...
     taskkill /PID %%a /F >nul 2>&1
-    timeout /t 1 /nobreak >nul
+    timeout /t 2 /nobreak >nul
 )
 
 cd /d "%ETHEND_DIR%"