style(workspace): remove the embedded work preview title bar

src/pages/Chat/AgentBrowserPanel.tsx

@@ -480,23 +480,24 @@ export function AgentBrowserPanel({
       ref={panelRef}
       className={cn(embedded ? 'relative flex min-h-0 w-full min-w-0 flex-1 flex-col overflow-hidden bg-background' : 'relative flex w-[400px] min-w-[300px] max-w-[48vw] shrink-0 flex-col overflow-hidden border-l border-border/80 bg-background shadow-[-16px_0_32px_hsl(220_20%_16%_/_0.06)] max-[900px]:fixed max-[900px]:inset-y-10 max-[900px]:right-0 max-[900px]:z-40 max-[900px]:max-w-[min(92vw,420px)]')}
       data-testid="agent-browser-panel"
+      aria-label={embedded ? '作品预览' : '开发浏览器'}
     >
-      <div className="flex h-10 shrink-0 items-center gap-2 border-b border-border/70 px-2.5">
+      {!embedded && <div className="flex h-10 shrink-0 items-center gap-2 border-b border-border/70 px-2.5">
         <span className="flex h-6 w-6 items-center justify-center rounded-md bg-brand-soft text-brand">
           <Globe2 className="h-3.5 w-3.5" aria-hidden="true" />
         </span>
-        <h2 className="min-w-0 flex-1 truncate text-xs font-semibold">{embedded ? '作品预览' : '开发浏览器'}</h2>
+        <h2 className="min-w-0 flex-1 truncate text-xs font-semibold">开发浏览器</h2>
         <Button
           type="button"
           variant="ghost"
           size="icon"
           className="h-8 w-8 rounded-md text-muted-foreground"
-          aria-label={embedded ? '收起作品' : '关闭开发浏览器'}
+          aria-label="关闭开发浏览器"
           onClick={() => onOpenChange(false)}
         >
           <X className="h-4 w-4" aria-hidden="true" />
         </Button>
-      </div>
+      </div>}
 
       <form className="flex h-10 shrink-0 items-center gap-1 border-b border-border/70 px-2" onSubmit={handleOpenAddress}>
         <Button type="button" variant="ghost" size="icon" className="h-7 w-7 rounded-md" aria-label="后退" disabled={!snapshot?.canGoBack || busy} onClick={() => handleNavigate('back')}>