feat(sprint7): Phase 2.5 — Club Event Calendar

- Flyway V14: club_events + event_rsvps tables with reminder_sent tracking
- Enums: EventType, RsvpStatus, RecurrenceRule + extend AuditEventType/NotificationType
- Entities: ClubEvent (extends AbstractTenantEntity), EventRsvp (unique event+member)
- Repositories: ClubEventRepository, EventRsvpRepository with date-range and status queries
- EventService: CRUD, RSVP with maxAttendees enforcement (409 if full), iCal RFC 5545 generation, recurring event virtual expansion, notifications on create/cancel, auto-post to Info Board
- EventReminderScheduler: hourly check, 24h reminder to ACCEPTED/MAYBE attendees
- EventController: admin CRUD (MANAGE_INFO_BOARD permission), portal upcoming events, RSVP endpoint, iCal download (text/calendar), attendee list
- Frontend: events.ts service (React Query hooks matching apiClient pattern), admin calendar page (month grid with event dots, create dialog, event cards), portal events page (RSVP buttons, capacity display)
- Navigation: added Kalender with Calendar icon
- i18n: events.* keys in de.json and en.json
- UI: added @radix-ui/react-switch + Switch component

cannamanage-frontend/messages/en.json

@@ -717,5 +717,41 @@
     "noPosts": "No posts yet. Create the first one!",
     "confirmDelete": "Are you sure you want to delete this post?",
     "unreadCount": "{count} unread"
+  },
+  "events": {
+    "title": "Calendar",
+    "description": "Club events and appointments",
+    "portalTitle": "Events",
+    "portalDescription": "Upcoming events from your club",
+    "createEvent": "Create Event",
+    "upcomingEvents": "Upcoming Events",
+    "noUpcomingEvents": "No upcoming events",
+    "noEventsOnDay": "No events on this day",
+    "cancel": "Cancel",
+    "full": "Fully booked",
+    "form": {
+      "title": "Title",
+      "type": "Type",
+      "start": "Start",
+      "end": "End",
+      "location": "Location",
+      "description": "Description",
+      "maxAttendees": "Max Attendees",
+      "recurring": "Recurring",
+      "recurrenceRule": "Recurrence",
+      "recurrenceEnd": "End Date"
+    },
+    "rsvp": {
+      "accept": "Accept",
+      "decline": "Decline",
+      "maybe": "Maybe"
+    },
+    "types": {
+      "MEETING": "Member Meeting",
+      "HARVEST_FESTIVAL": "Harvest Festival",
+      "BOARD_MEETING": "Board Meeting",
+      "WORKSHOP": "Workshop",
+      "OTHER": "Other"
+    }
   }
 }