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-Backend/src/app.module.ts

@@ -28,6 +28,7 @@ import { DashboardModule } from './dashboard/dashboard.module';
 import { SearchModule } from './search/search.module';
 import { ExportModule } from './export/export.module';
 import { QrModule } from './qr/qr.module';
+import { RemindersModule } from './reminders/reminders.module';
 import { ProductsModule } from './products/products.module';
 import { BottlingModule } from './bottling/bottling.module';
 import { ProductionBatchesModule } from './production-batches/production-batches.module';
@@ -114,6 +115,7 @@ import { IdempotencyInterceptor } from './common/idempotency/idempotency.interce
     CleanupModule,
     AutopilotModule,
     WithdrawalModule,
+    RemindersModule,
     LabelTemplatesModule,
     ImportModule,
     PublicModule,