fix(service-test): rename response 'data' field to 'result' to avoid api client unwrap conflict

The api client unwraps response.data automatically, which conflicts
with our testService response having its own 'data' field.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/routes/dashboard/service-test.tsx

@@ -57,7 +57,7 @@ function ServiceTestPage() {
     service: string;
     success: boolean;
     responseTimeMs: number;
-    data: any;
+    result: any;
     error?: string;
   } | null>(null);
   const [copied, setCopied] = useState(false);
@@ -287,11 +287,11 @@ function ServiceTestPage() {
           )}
 
           {/* JSON output */}
-          {result.data !== null && (
+          {result.result !== null && (
             <>
               <Separator className="my-4 bg-border" />
               <pre className="max-h-[600px] overflow-auto rounded-xl border border-border bg-muted/50 p-4 font-mono text-xs leading-relaxed">
-                {JSON.stringify(result.data, null, 2)}
+                {JSON.stringify(result.result, null, 2)}
               </pre>
             </>
           )}