fix: T4a browser check findings

- Withdrawal wording from one backend helper everywhere ("bis
  einschließlich TT.MM. – ab TT.MM. wieder erntefähig", year when it
  crosses New Year); withdrawal-status returns lastBlockedDay and the
  ready text, the frontend no longer computes dates
- Calendar events name colony or apiary, withdrawal events carry
  product and detail; compact withdrawal rows on mobile
- One bottling warning per colony and treatment; pre-save hint
- Offline: online-only actions disabled with a reason, cached data
  shows its timestamp, open sheets block submit offline
- Mobile: no horizontal scroll at 360 px, touch targets >= 44 px,
  toasts and the add button no longer cover content
- Cleanup sheet without destructive preselection; natural sort of
  colony codes; collapsible automation rule cards; varroa list newest
  first with chart axes; text fixes

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

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

@@ -16,6 +16,12 @@ export interface CalendarEvent {
   title: string;
   relatedType: string;
   relatedId: string;
+  /** Colony code, or apiary name for harvests and apiary tasks; absent for general tasks. */
+  context?: string;
+  /** WITHDRAWAL only: the treatment product. */
+  product?: string;
+  /** WITHDRAWAL only: "bis einschließlich 26.10. – ab 27.10. wieder erntefähig". */
+  detail?: string;
 }
 
 export interface CalendarQuery {