feat: async task pipeline for media and llm workflows

client/src/pages/Dashboard.tsx

@@ -51,11 +51,10 @@ export default function Dashboard() {
 
   return (
     <div className="space-y-6">
-      {/* Welcome header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4">
         <div>
           <h1 className="text-2xl font-bold tracking-tight" data-testid="dashboard-title">
-            欢迎回来，{user?.name || "球友"}
+            当前用户：{user?.name || "未命名用户"}
           </h1>
           <div className="flex items-center gap-3 mt-2">
             <NTRPBadge rating={stats?.ntrpRating || 1.5} />