feat: implement favorites functionality across playlists components

src/lib/api/services/playlists.ts

@@ -19,6 +19,8 @@ export interface Playlist {
   is_main: boolean
   is_current: boolean
   is_deletable: boolean
+  is_favorited: boolean
+  favorite_count: number
   created_at: string
   updated_at: string | null
   sound_count: number
@@ -45,6 +47,7 @@ export interface GetPlaylistsParams {
   sort_order?: SortOrder
   limit?: number
   offset?: number
+  favorites_only?: boolean
 }
 
 export class PlaylistsService {
@@ -70,6 +73,9 @@ export class PlaylistsService {
     if (params?.offset) {
       searchParams.append('offset', params.offset.toString())
     }
+    if (params?.favorites_only) {
+      searchParams.append('favorites_only', 'true')
+    }
 
     const url = searchParams.toString()
       ? `/api/v1/playlists/?${searchParams.toString()}`