feat: garden care tracking - logs, schedules, reminders (task 73)

- logCare/deleteCareLog actions with schedule update and reminder wiring
- upsertCareSchedule/deleteCareSchedule/toggleCareSchedule actions
- updateScheduleAfterCare helper cancels old reminder, schedules new one
- getCareLogs/getCareSchedules/getOverduePlants/getCareDueSoon queries
- CareLogForm, CareScheduleEditor, CareHistoryList components
- Plant detail Care tab wired up with schedule editor + log form + history
- Log plant care quick-add added to garden manifest

src/modules/garden/manifest.tsx

@@ -132,6 +132,12 @@ const gardenManifest: ModuleManifest = {
       icon: "sprout",
       url: "/garden/containers/new",
     },
+    {
+      id: "garden.log-care",
+      label: "Log plant care",
+      icon: "droplets",
+      url: "/garden",
+    },
   ],
 };