- Updated auth-context.tsx to use new exchange permissions
(CREATE_EXCHANGE, VIEW_OWN_EXCHANGES, etc.) instead of old
appointment permissions (BOOK_APPOINTMENT, etc.)
- Updated exchange/page.tsx, trades/page.tsx, admin/trades/page.tsx
to use correct permission constants
- Updated profile/page.test.tsx mock permissions
- Updated admin/availability/page.tsx to use constants.exchange
instead of constants.booking
- Added /api/exchange/slots endpoint to return available slots
for a date, filtering out already booked slots
- Fixed E2E tests:
- exchange.spec.ts: Wait for button to be enabled before clicking
- permissions.spec.ts: Use more specific heading selector
- price-history.spec.ts: Expect /exchange redirect for regular users
