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/app/garden/plants/[id]/page.tsx

@@ -1,19 +1,26 @@
 import { notFound } from "next/navigation";
+import { listCalendars } from "@/modules/garden/server/calendar-bridge";
 import { getCareLogs, getCareSchedules, getPlant } from "@/modules/garden/server/queries";
 import { PlantDetail } from "@/modules/garden/components/plant-detail";
 
 export default async function PlantPage({ params }: { params: Promise<{ id: string }> }) {
   const { id } = await params;
-  const [plant, careLogs, careSchedules] = await Promise.all([
+  const [plant, careLogs, careSchedules, calendars] = await Promise.all([
     getPlant(id),
     getCareLogs(id),
     getCareSchedules(id),
+    listCalendars(),
   ]);
   if (!plant) notFound();
 
   return (
     <div className="page-content">
-      <PlantDetail plant={plant} careLogs={careLogs} careSchedules={careSchedules} />
+      <PlantDetail
+        plant={plant}
+        careLogs={careLogs}
+        careSchedules={careSchedules}
+        calendars={calendars}
+      />
     </div>
   );
 }