fix: prefer requested_model over SDK-resolved model in status bar

chat/page.tsx used statusData.model (the SDK's resolved wire ID like
claude-opus-4-20250514) instead of statusData.requested_model (the
alias the user selected). This caused the "Connected (...)" status
to flash a stale/misleading model ID.

useSSEStream.ts already had the correct priority — this aligns
chat/page.tsx to match.

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

Author: jasonjaclyn2017

src/app/chat/page.tsx

@@ -260,7 +260,7 @@ export default function NewChatPage() {
                   try {
                     const statusData = JSON.parse(event.data);
                     if (statusData.session_id) {
-                      setStatusText(`Connected (${statusData.model || 'claude'})`);
+                      setStatusText(`Connected (${statusData.requested_model || statusData.model || 'claude'})`);
                       setTimeout(() => setStatusText(undefined), 2000);
                     } else if (statusData.notification) {
                       setStatusText(statusData.message || statusData.title || undefined);