fix: suppress unhandled rejection from saveStatus on rate limit

useAsync re-throws after setting error state, so callers that don't
await or catch the returned promise get an unhandled rejection. Fixes
JAVASCRIPT-REACT-E (429 on presence endpoint).

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

src/app/features/settings/account/Profile.tsx

@@ -399,7 +399,7 @@ function ProfileStatus() {
     evt.preventDefault();
     if (saving) return;
     const msg = statusMsg.trim();
-    saveStatus(msg);
+    saveStatus(msg).catch(() => undefined);
 
     const delayMs = getMsFromOption(clearAfter);
     if (msg && delayMs > 0) {