feat: add favorites filter to sounds retrieval and update SoundsPage component

src/lib/api/services/sounds.ts

@@ -41,6 +41,7 @@ export interface GetSoundsParams {
   sort_order?: SortOrder
   limit?: number
   offset?: number
+  favorites_only?: boolean
 }
 
 export interface GetSoundsResponse {
@@ -77,6 +78,9 @@ export class SoundsService {
     if (params?.offset) {
       searchParams.append('offset', params.offset.toString())
     }
+    if (params?.favorites_only) {
+      searchParams.append('favorites_only', 'true')
+    }
 
     const url = searchParams.toString()
       ? `/api/v1/sounds/?${searchParams.toString()}`