feat(jellyfin): emit refreshResource events on favorite/rating changes

Like Subsonic's setStar/setRating, the Jellyfin favorite and rating
endpoints now broadcast a refreshResource event, so the web UI updates
immediately when a Jellyfin client changes an annotation.

Also fixes model.GetEntityByID to propagate unexpected repository errors
instead of reporting them as not-found, preserving the 500-vs-404
distinction for all its callers.

model/get_entity.go

@@ -2,29 +2,26 @@ package model
 
 import (
 	"context"
+	"errors"
 )
 
 // TODO: Should the type be encoded in the ID?
 func GetEntityByID(ctx context.Context, ds DataStore, id string) (any, error) {
-	ar, err := ds.Artist(ctx).Get(id)
-	if err == nil {
-		return ar, nil
+	getters := []func() (any, error){
+		func() (any, error) { return ds.Artist(ctx).Get(id) },
+		func() (any, error) { return ds.Album(ctx).Get(id) },
+		func() (any, error) { return ds.Playlist(ctx).Get(id) },
+		func() (any, error) { return ds.MediaFile(ctx).Get(id) },
+		func() (any, error) { return ds.Radio(ctx).Get(id) },
 	}
-	al, err := ds.Album(ctx).Get(id)
-	if err == nil {
-		return al, nil
+	for _, get := range getters {
+		entity, err := get()
+		if err == nil {
+			return entity, nil
+		}
+		if !errors.Is(err, ErrNotFound) {
+			return nil, err
+		}
 	}
-	pls, err := ds.Playlist(ctx).Get(id)
-	if err == nil {
-		return pls, nil
-	}
-	mf, err := ds.MediaFile(ctx).Get(id)
-	if err == nil {
-		return mf, nil
-	}
-	r, err := ds.Radio(ctx).Get(id)
-	if err == nil {
-		return r, nil
-	}
-	return nil, err
+	return nil, ErrNotFound
 }

model/get_entity_test.go

@@ -0,0 +1,40 @@
+package model_test
+
+import (
+	"context"
+
+	"github.com/navidrome/navidrome/model"
+	"github.com/navidrome/navidrome/tests"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("GetEntityByID", func() {
+	var ds *tests.MockDataStore
+	var ctx context.Context
+
+	BeforeEach(func() {
+		ds = &tests.MockDataStore{}
+		ctx = GinkgoT().Context()
+	})
+
+	It("returns the entity matching the id", func() {
+		ds.Album(ctx).(*tests.MockAlbumRepo).SetData(model.Albums{{ID: "a1", Name: "One"}})
+		entity, err := model.GetEntityByID(ctx, ds, "a1")
+		Expect(err).ToNot(HaveOccurred())
+		Expect(entity).To(BeAssignableToTypeOf(&model.Album{}))
+		Expect(entity.(*model.Album).ID).To(Equal("a1"))
+	})
+
+	It("returns ErrNotFound when no entity matches", func() {
+		_, err := model.GetEntityByID(ctx, ds, "missing")
+		Expect(err).To(MatchError(model.ErrNotFound))
+	})
+
+	It("propagates unexpected repository errors instead of reporting not-found", func() {
+		ds.Album(ctx).(*tests.MockAlbumRepo).SetError(true)
+		_, err := model.GetEntityByID(ctx, ds, "a1")
+		Expect(err).To(HaveOccurred())
+		Expect(err).ToNot(MatchError(model.ErrNotFound))
+	})
+})