Live-update the account page status block after sync

Mirrors the dashboard's row update: "Sync now" on the account page
refreshes the status block in place and shows a toast, instead of
navigating to a separate result page.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/web/account.py

@@ -7,7 +7,7 @@ from app.auth.csrf import ensure_csrf_token, validate_csrf
 from app.db.repositories import ActivityRepository, SyncRunRepository, UserRepository
 from app.security.credentials import CredentialCipher
 from app.sync.manager import SyncAlreadyRunning
-from app.web.operations import _normalize_outcome
+from app.web.operations import _outcome_toast, _toast_html
 from app.web.routes import templates
 
 router = APIRouter()
@@ -92,11 +92,19 @@ async def account_sync(request: Request, csrf_token: str = Form(...)):
     validate_csrf(request, csrf_token)
     try:
         outcome = await request.app.state.sync_manager.sync_user(user_id)
+        with request.app.state.session_factory() as session:
+            user = UserRepository(session).get(user_id)
+        label = user.name if user is not None else "Account"
+        message, level = _outcome_toast(outcome, label)
     except SyncAlreadyRunning:
-        return HTMLResponse("Sync already running for this user", status_code=409)
-    return templates.TemplateResponse(
-        request, "fragments/sync_result.html", {"outcomes": [_normalize_outcome(outcome)]}
+        with request.app.state.session_factory() as session:
+            user = UserRepository(session).get(user_id)
+        label = user.name if user is not None else "Account"
+        message, level = f"{label}: sync already running", "info"
+    status_html = (
+        templates.get_template("fragments/account_status.html").render(user=user) if user is not None else ""
     )
+    return HTMLResponse(status_html + _toast_html(message, level))
 
 
 @router.get("/account/edit", response_class=HTMLResponse)