feat(swift): implement agenda planning module (Epic 4 UI)

- Add AgendaBlock core component with list, create, cancel, reschedule modes
- Implement AgendaListView with patient/type/location details and actions
- Implement AgendaCreateForm with fuzzy patient search and validation
- Implement AgendaCancelView with disambiguation support
- Implement AgendaRescheduleForm with date/time picker
- Integrate with server actions (create, cancel, reschedule)
- Add radio-group UI component
- Update documentation and status

lib/swift/index.ts

@@ -7,3 +7,4 @@ export * from './use-swift-voice';
 export * from './intent-classifier';
 export * from './intent-classifier-ai';
 export * from './entity-extractor';
+export * from './date-time-parser';