Migrated all admin API clients to automatically send X-Locale and X-Timezone headers
with every request for proper internationalization and timezone-aware operations.
Changes:
- Migrated slot-definitions.ts, materialisation.ts, courts.ts, booking-admin.ts to use apiFetch utility
- Added getLocaleHeaders() helper to admin-clubs.ts for SSR compatibility
- Added getSlotDefinitionPresets() endpoint to fetch localized preset metadata
- Updated slot-definitions types to support API-based preset loading
- Refactored GenerateSlotDefinitionsModal to fetch presets from API with localized titles/descriptions
Benefits:
- All API requests now include user's locale (e.g., en-US, fr-CH) for i18n
- Timezone-aware operations use browser's Intl.DateTimeFormat timezone
- Preset titles and descriptions are localized per user language
- Consistent header management across all admin endpoints
Technical Details:
- apiFetch extracts locale from URL pathname via getPathnameLocale()
- apiFetch automatically adds credentials: 'include' for session auth
- admin-clubs.ts uses manual headers for SSR cookie forwarding compatibility
- GenerateSlotDefinitionsModal shows loading state while fetching presets