/auth/status now returns per-backend status: Claude warns on <24h expiry, Gemini warns only when oauth_creds.json is missing or has no refresh_token (access token rotates automatically so expiry_date is not a useful signal). Banner shows warnings for both backends when needed, and the hint text names the specific CLI commands to run. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>