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/page.tsx

@@ -1,12 +1,47 @@
-import { listContainers } from "@/modules/garden/server/queries";
+import Link from "next/link";
+import { listContainers, listPlants } from "@/modules/garden/server/queries";
 import { ContainerList } from "@/modules/garden/components/container-list";
+import { PlantList } from "@/modules/garden/components/plant-list";
+
+type Props = {
+  searchParams: Promise<{ tab?: string }>;
+};
+
+export default async function GardenPage({ searchParams }: Props) {
+  const { tab = "containers" } = await searchParams;
+  const isPlants = tab === "plants";
+
+  const [containers, plants] = await Promise.all([
+    listContainers(),
+    isPlants ? listPlants() : Promise.resolve([]),
+  ]);
 
-export default async function GardenPage() {
-  const containers = await listContainers();
   return (
     <div className="page-content">
       <h1 className="page-title">Garden</h1>
-      <ContainerList containers={containers} />
+
+      <div className="flex gap-6 border-b border-[var(--ink-faint)] mb-6">
+        <Link
+          href="/garden?tab=containers"
+          className={`pb-2 text-sm font-medium transition-colors ${
+            !isPlants
+              ? "border-b-2 border-[var(--ink)] text-[var(--ink)]"
+              : "text-[var(--ink-mute)]"
+          }`}
+        >
+          Containers
+        </Link>
+        <Link
+          href="/garden?tab=plants"
+          className={`pb-2 text-sm font-medium transition-colors ${
+            isPlants ? "border-b-2 border-[var(--ink)] text-[var(--ink)]" : "text-[var(--ink-mute)]"
+          }`}
+        >
+          Plants
+        </Link>
+      </div>
+
+      {isPlants ? <PlantList plants={plants} /> : <ContainerList containers={containers} />}
     </div>
   );
 }