feat: T4 wave 6 - reminders and morning digest, next steps UI, warnings and notifications UI

- In-app reminders: task due (skips rescheduled tasks, catch-up wording)
  and a per-user morning digest step in the daily job
- Frontend: "Als Nächstes" on the colony page, "Heute" on the dashboard,
  inspection-due card, season chip, apiary overview fields, cleanup
  sheet for ended colonies
- Frontend: plausibility warnings that stay until dismissed, withdrawal
  spans in the calendar, notification bell with categories and links,
  notification settings in the profile
- ARCHITECTURE.md: T4a sections 11.1-11.10, assumptions 31-41, handler
  table and daily job step order

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Frontend/src/lib/calendar/types.ts

@@ -4,12 +4,15 @@ export type CalendarEventType =
   | "TREATMENT"
   | "FEEDING"
   | "HARVEST"
-  | "QUEEN_ASSIGNMENT";
+  | "QUEEN_ASSIGNMENT"
+  | "WITHDRAWAL";
 
 export interface CalendarEvent {
   id: string;
   type: CalendarEventType;
   date: string;
+  /** WITHDRAWAL only: the last day of the span, inclusive. */
+  endDate?: string;
   title: string;
   relatedType: string;
   relatedId: string;