style: align all pages with CLAUDE.md design system
- Inputs: uniform padding (8px 12px), borderRadius 7, bg-inset background
- List rows/cards: bg-subtle background, border-subtle border (bg-inset was input-only)
- Invite/admin badge borders: use accent-border var instead of raw accent
- Section headers: 11px, weight 500, uppercase, 0.7px letter-spacing
- Notification/status banners: borderRadius 8
- Remove debug console.log statements from SettingsPage avatar upload flow
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>