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/components/autopilot/season-chip.tsx

@@ -0,0 +1,41 @@
+import { CalendarRange } from "lucide-react";
+import type { SeasonSegment } from "@/lib/autopilot/types";
+
+export const SEGMENT_LABELS: Record<SeasonSegment, string> = {
+  WINTERRUHE: "Winterruhe",
+  FRUEHJAHR: "Frühjahr",
+  SCHWARMZEIT: "Schwarmzeit",
+  SOMMER: "Sommer",
+  SPAETSOMMER: "Spätsommer",
+  HERBST: "Herbst",
+};
+
+/** „Schwarmzeit · alle 7 Tage“; without an interval just the segment. */
+export function seasonChipText(season: {
+  segment: SeasonSegment;
+  intervalDays: number | null;
+}): string {
+  const label = SEGMENT_LABELS[season.segment];
+  if (season.intervalDays === null) return label;
+  return season.intervalDays === 1
+    ? `${label} · täglich`
+    : `${label} · alle ${season.intervalDays} Tage`;
+}
+
+interface SeasonChipProps {
+  segment: SeasonSegment;
+  intervalDays?: number | null;
+  /** Names the apiary: „Obstwiese: Schwarmzeit“. */
+  apiaryName?: string;
+}
+
+/** The season of an apiary as icon plus words. */
+export function SeasonChip({ segment, intervalDays = null, apiaryName }: SeasonChipProps) {
+  const text = seasonChipText({ segment, intervalDays });
+  return (
+    <span className="inline-flex min-h-6 items-center gap-1 rounded-full bg-muted px-2.5 py-0.5 text-xs font-medium text-foreground">
+      <CalendarRange className="size-3.5 shrink-0" aria-hidden />
+      {apiaryName ? `${apiaryName}: ${text}` : text}
+    </span>
+  );
+}