chore(web3): start.bat 不再开新窗口

去掉 start cmd /k 和末尾的 pause —— 直接在当前窗口跑 npm run dev，
Ctrl+C 即可停 dev server。

web3/start.bat

@@ -36,15 +36,6 @@ if not exist "web3\node_modules" (
     )
 )
 
-echo Starting frontend in new window...
-start "web3-frontend" cmd /k "cd /d %CD%\web3 && npm run dev"
-
-echo.
-echo ============================================================
-echo   Frontend starting at  http://localhost:5175
-echo.
-echo   Close this window or press any key to dismiss.
-echo ============================================================
-echo.
-
-pause
\ No newline at end of file
+echo Starting frontend...
+cd /d "%CD%\web3"
+npm run dev
\ No newline at end of file