Checkpoint: v4.0 media service, compose deploy, and verified docs

client/src/pages/Training.tsx

@@ -95,7 +95,7 @@ export default function Training() {
     <div className="space-y-6">
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="text-2xl font-bold tracking-tight">训练计划</h1>
+          <h1 className="text-2xl font-bold tracking-tight" data-testid="training-title">训练计划</h1>
           <p className="text-muted-foreground text-sm mt-1">AI个性化训练方案</p>
         </div>
       </div>
@@ -143,6 +143,7 @@ export default function Training() {
               </div>
             </div>
             <Button
+              data-testid="training-generate-button"
               onClick={() => generateMutation.mutate({ skillLevel, durationDays })}
               disabled={generateMutation.isPending}
               className="w-full sm:w-auto gap-2"