Troubleshooting

• Build error about 'canvas': ensure the editor route is client-only under app/(client)/presentations/[id].
• Auth callback 404: ensure /auth/callback exists and Supabase has the correct redirect URLs.
• AI errors: check OPENAI_API_KEY and rate limits; switch to JSON view in Menus for validation errors.
• No weather/news: add OPENWEATHER_API_KEY and valid RSS URL; test /api/dashboard-data endpoints directly.
• Device not appearing: implement viewer heartbeat and refresh /displays page.