feat: shared back navigation on detail pages

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

@@ -1,8 +1,9 @@
 import { notFound } from "next/navigation";
+import { DetailBackLink } from "@/components/detail-back-link";
+import { getShareLinksForEntity } from "@/modules/_core/share";
+import { PlantDetail } from "@/modules/garden/components/plant-detail";
 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";
-import { getShareLinksForEntity } from "@/modules/_core/share";
 
 export default async function PlantPage({ params }: { params: Promise<{ id: string }> }) {
   const { id } = await params;
@@ -17,6 +18,7 @@ export default async function PlantPage({ params }: { params: Promise<{ id: stri
 
   return (
     <div className="page-content">
+      <DetailBackLink href="/garden?tab=plants" label="Plants" className="mb-4" />
       <PlantDetail
         plant={plant}
         careLogs={careLogs}