fix(portable): keep config center visible on startup

portable/lib/wait-gateway.bat

@@ -1,14 +1,11 @@
 @echo off
-REM wait-gateway.bat - open Dashboard only after the Gateway is actually listening.
-REM Fixes issue #46/#48: on slow USB drives the gateway needs tens of seconds to
-REM stage bundled deps on first run; opening http://127.0.0.1:PORT before it is
-REM LISTENING shows "connection refused" and users think it is broken.
+REM wait-gateway.bat - fallback watcher after Windows-Start opens loading.html.
+REM Slow USB drives can need tens of seconds before the gateway listens.
 REM
-REM 角色变更：现在 Windows-Start.bat 会先开 lib\loading.html 启动首屏，由首屏
-REM 自己轮询 /ready 并自动跳 Dashboard。本脚本退居"兜底"——万一首屏页的
-REM file:// fetch 被浏览器拦住没跳成，这里仍轮询端口、就绪后开 Dashboard。
+REM Windows-Start opens Config Center immediately, so the ready path only
+REM exits quietly. On timeout, reopen Config Center as a recovery hint.
 REM Usage (called in background by Windows-Start.bat): wait-gateway.bat PORT
-REM Polls every 2s, up to 150 tries (~5 min). Opens the browser once ready.
+REM Polls every 2 seconds, up to about 5 minutes.
 
 set "PORT=%~1"
 if "%PORT%"=="" set "PORT=18789"
@@ -23,8 +20,6 @@ timeout /t 2 /nobreak >nul
 goto :wait_loop
 
 :ready
-timeout /t 1 /nobreak >nul
-start "" http://127.0.0.1:%PORT%/#token=uclaw
 exit /b 0
 
 :timeout