feat: 机器人对话窗口保持打开（不用点按钮）

web/app/components/base/chat/embedded-chatbot/config-panel/index.tsx

@@ -26,6 +26,8 @@ const ConfigPanel = () => {
   const site = appData?.site
   const themeBuilder = useThemeContext()
 
+  handleStartChat()
+
   return (
     <div className='flex flex-col max-h-[80%] w-full max-w-[720px]'>
       <div