Enable turn on/off Favorites/Loved feature. (#917)

* Added option to enable/disable favorites in Song

* Added option to enable/disable favorites in Artist

* Added option to enable/disable favorites in Albums and Favorites tab in sidebar

* Added option to enable/disable favorites in Player

* Set default value of enableFavourites as true

* Improved the functionality to enable/disable Favorites

* Add `EnableFavourites` config option

Co-authored-by: Deluan <deluan@navidrome.org>

server/app/serve_index.go

@@ -36,6 +36,7 @@ func serveIndex(ds model.DataStore, fs fs.FS) http.HandlerFunc {
 			"enableTranscodingConfig": conf.Server.EnableTranscodingConfig,
 			"gaTrackingId":            conf.Server.GATrackingID,
 			"enableDownloads":         conf.Server.EnableDownloads,
+			"enableFavourites":        conf.Server.EnableFavourites,
 			"devActivityPanel":        conf.Server.DevActivityPanel,
 			"devFastAccessCoverArt":   conf.Server.DevFastAccessCoverArt,
 		}

server/app/serve_index_test.go

@@ -114,6 +114,17 @@ var _ = Describe("serveIndex", func() {
 		Expect(config).To(HaveKeyWithValue("enableDownloads", true))
 	})
 
+	It("sets the enableLoved", func() {
+		conf.Server.EnableFavourites = true
+		r := httptest.NewRequest("GET", "/index.html", nil)
+		w := httptest.NewRecorder()
+
+		serveIndex(ds, fs)(w, r)
+
+		config := extractAppConfig(w.Body.String())
+		Expect(config).To(HaveKeyWithValue("enableFavourites", true))
+	})
+
 	It("sets the gaTrackingId", func() {
 		conf.Server.GATrackingID = "UA-12345"
 		r := httptest.NewRequest("GET", "/index.html", nil)