feat: garden plants crud (task 72)

- perenual species lookup with 24h db cache (api key optional)
- /api/garden/species-search route handler
- createPlant / updatePlant / deletePlant server actions
- addPlantImage / removePlantImage / setPrimaryImage actions (max 10)
- listPlants query grouped by container with last-watered subquery
- getPlant query with care log summary and active schedules
- plant-form client component with species autofill and image upload
- plant-list server component grouped by container with unassigned bucket
- plant-detail client component with info/gallery/care tabs
- species-search debounced combobox component
- /garden/plants/new, /[id], /[id]/edit pages
- garden.plant entity registered with search and share support
- /garden page updated to containers/plants tabs (default: containers)

src/app/garden/plants/new/page.tsx

@@ -0,0 +1,18 @@
+import { listContainers } from "@/modules/garden/server/queries";
+import { PlantForm } from "@/modules/garden/components/plant-form";
+
+export default async function NewPlantPage({
+  searchParams,
+}: {
+  searchParams: Promise<{ containerId?: string }>;
+}) {
+  const params = await searchParams;
+  const containers = await listContainers();
+
+  return (
+    <div className="page-content max-w-xl">
+      <h1 className="page-title">Add Plant</h1>
+      <PlantForm containers={containers} defaultContainerId={params.containerId ?? null} />
+    </div>
+  );
+}