- Enable DevToolbar in Vercel preview deployments by checking
NEXT_PUBLIC_VERCEL_ENV === 'preview' alongside NODE_ENV === 'development'
in all guards and the index.ts tree-shaking condition
- Rename "Dev Telemetry" → "Dev Toolbar"; badge shows "Preview" or "Local"
- Add ExtraTab extension point to DevToolbar so consumers can inject tabs
- Add ResourceWarningsTab in studio: same off/warn/crit toggles for all
resource warning types, wired into the existing DevToolbar via _app.tsx
- Remove standalone SupabaseDevToolbar (superseded by the tab above)
- localStorage persistence already handled by the existing STORAGE_KEY
logic in DevToolbarContext — enabled state survives refreshes
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>