feat: share links visible on plants/containers; container image gallery

- Fix ShareButton silently swallowing errors from createShareLink; now
  shows inline error text so failures are visible to the user
- Add getShareLinksForEntity server action and EntityShareLink type to
  _core/share.ts
- Add ShareLinkList component — renders active share links per entity
  with per-row Revoke; renders nothing when empty
- Wire ShareLinkList into plant and container detail pages (loaded
  server-side in parallel with the entity fetch)
- Add images jsonb column to garden_containers schema + migration 0018
- Add addContainerImage / removeContainerImage / setContainerPrimaryImage
  server actions mirroring the plant image pattern (10-image cap, first
  upload auto-sets cover)
- Update ContainerDetailDto, listContainers, getContainer to include images
- Rewrite ContainerDetail with Info/Gallery tabs; Gallery tab mirrors
  plant gallery (3-col grid, star/X overlays, upload button, counter)
- Update ContainerShareData and container renderSharedView to show cover
  image hero and secondary image grid on public share pages

src/modules/garden/server/share-queries.ts

@@ -8,6 +8,7 @@ export type ContainerShareData = {
   type: string;
   locationNotes: string | null;
   coverImageUrl: string | null;
+  images: string[];
   plants: { id: string; name: string; scientificName: string | null }[];
 };
 
@@ -74,6 +75,7 @@ export async function loadContainerForShare(id: string): Promise<ContainerShareD
     type: container.type,
     locationNotes: container.locationNotes,
     coverImageUrl: container.coverImageUrl,
+    images: container.images ?? [],
     plants,
   };
 }