feat: garden calendar + lists integrations (task 74)

- calendar-bridge.ts and lists-bridge.ts isolate cross-module deps
- scheduleOnCalendar action: creates event from care schedule with 30-min
  slot, title convention (Water/Fertilize/Repot/Prune/custom), reminder opt
- pushOverdueToTaskList action: inserts one task per overdue (plant+schedule)
  pair into the default task list, skips duplicate text entries
- CareScheduleEditor: per-row calendar 📅 button opens inline form with
  calendar select + optional reminder minutes + success link to /calendar
- Garden page header: PushOverdueButton with auto-dismissing feedback toast

src/modules/garden/components/plant-detail.tsx

@@ -4,6 +4,7 @@ import { useState, useTransition } from "react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
 import { deletePlant, addPlantImage, removePlantImage, setPrimaryImage } from "../server/actions";
+import type { CalendarDto } from "../server/calendar-bridge";
 import type { CareLogDto, CareScheduleDto, PlantDetailDto } from "../server/queries";
 import { CareHistoryList } from "./care-history-list";
 import { CareLogForm } from "./care-log-form";
@@ -15,6 +16,7 @@ type Props = {
   plant: PlantDetailDto;
   careLogs: CareLogDto[];
   careSchedules: CareScheduleDto[];
+  calendars: CalendarDto[];
 };
 
 function InfoRow({
@@ -41,7 +43,7 @@ function healthBadgeClass(status: string): string {
   return "badge-warning";
 }
 
-export function PlantDetail({ plant, careLogs, careSchedules }: Props) {
+export function PlantDetail({ plant, careLogs, careSchedules, calendars }: Props) {
   const [tab, setTab] = useState<Tab>("info");
   const [confirming, setConfirming] = useState(false);
   const [isPending, startTransition] = useTransition();
@@ -260,7 +262,7 @@ export function PlantDetail({ plant, careLogs, careSchedules }: Props) {
       {/* Care */}
       {tab === "care" && (
         <div className="flex flex-col gap-6">
-          <CareScheduleEditor plantId={plant.id} schedules={careSchedules} />
+          <CareScheduleEditor plantId={plant.id} schedules={careSchedules} calendars={calendars} />
           <div className="border-t border-[var(--ink-faint)] pt-4">
             <p className="text-sm font-semibold text-[var(--ink-mute)] uppercase tracking-wide mb-3">
               Log care