fix(artwork): invalidate artwork when an uploaded image is deleted

Deleting an artist/radio/playlist upload cleared the filename but left the found
item_artwork row and its hash, so lists kept advertising the deleted cover's
hash-suffixed immutable URL and clients could display it indefinitely. Call
EnqueueArtwork after the delete-side Put, symmetric with upload, so the state is
cleared and re-resolved to the next source (or absent).

core/playlists/playlists.go

@@ -339,5 +339,9 @@ func (s *playlists) RemoveImage(ctx context.Context, playlistID string) error {
 	}
 
 	pls.UploadedImage = ""
-	return s.ds.Playlist(ctx).Put(pls)
+	if err := s.ds.Playlist(ctx).Put(pls); err != nil {
+		return err
+	}
+	s.imgUpload.EnqueueArtwork(ctx, consts.EntityPlaylist, pls.ID)
+	return nil
 }

core/playlists/playlists_test.go

@@ -420,6 +420,24 @@ var _ = Describe("Playlists", func() {
 			Expect(mockPlsRepo.Last.UploadedImage).To(BeEmpty())
 		})
 
+		It("clears the resolved artwork state and re-queues after removing an upload", func() {
+			ctx = request.WithUser(ctx, model.User{ID: "user-1", IsAdmin: false})
+			Expect(ds.Artwork(ctx).PutItemArtwork(&model.ItemArtwork{
+				ItemKind: "pl", ItemID: "pls-1", Hash: "oldhash", Source: "upload",
+			})).To(Succeed())
+
+			Expect(ps.RemoveImage(ctx, "pls-1")).To(Succeed())
+
+			_, err := ds.Artwork(ctx).GetItemArtwork("pl", "pls-1", model.ImageTypePrimary)
+			Expect(err).To(MatchError(model.ErrNotFound))
+			queued, _ := ds.ArtworkQueue(ctx).DequeueBatch(100)
+			Expect(queued).To(ContainElement(SatisfyAll(
+				HaveField("ItemKind", "pl"),
+				HaveField("ItemID", "pls-1"),
+				HaveField("Priority", model.ArtworkPriorityBump),
+			)))
+		})
+
 		It("denies non-owner", func() {
 			ctx = request.WithUser(ctx, model.User{ID: "other-user", IsAdmin: false})
 			err := ps.RemoveImage(ctx, "pls-1")

server/nativeapi/artists.go

@@ -69,6 +69,10 @@ func (api *Router) deleteArtistImage() http.HandlerFunc {
 		}
 		ar.UploadedImage = ""
 		ar.UpdatedAt = new(time.Now())
-		return api.ds.Artist(ctx).Put(ar, "uploaded_image", "updated_at")
+		if err := api.ds.Artist(ctx).Put(ar, "uploaded_image", "updated_at"); err != nil {
+			return err
+		}
+		api.imgUpload.EnqueueArtwork(ctx, consts.EntityArtist, ar.ID)
+		return nil
 	})
 }

server/nativeapi/radios.go

@@ -69,6 +69,10 @@ func (api *Router) deleteRadioImage() http.HandlerFunc {
 			return err
 		}
 		radio.UploadedImage = ""
-		return api.ds.Radio(ctx).Put(radio, "UploadedImage")
+		if err := api.ds.Radio(ctx).Put(radio, "UploadedImage"); err != nil {
+			return err
+		}
+		api.imgUpload.EnqueueArtwork(ctx, consts.EntityRadio, radio.ID)
+		return nil
 	})
 }