refactor(playlists): improve error handling and filtering logic

Enhance the `getPortalFavorites` and `getPortalLiveStreamFavorites` 
methods to include null checks for the fetched items. This prevents 
potential runtime errors when accessing properties of undefined. 
Additionally, improve code readability by restructuring the filter 
logic a more explicit format. Add a console log for the 
parsed playlist in the `addPortalFavorite` method for debugging 
purposes.

src/app/services/playlists.service.ts

@@ -143,20 +143,34 @@ export class PlaylistsService {
 
     getPortalFavorites(portalId: string) {
         return this.dbService
-            .getByID<{ favorites: Partial<XtreamItem>[] }>(
-                DbStores.Playlists,
-                portalId
-            )
-            .pipe(map((item) => item.favorites.filter(itm => itm && itm.stream_type && itm.stream_type !== 'live') ?? []));
+            .getByID<{
+                favorites: Partial<XtreamItem>[];
+            }>(DbStores.Playlists, portalId)
+            .pipe(
+                map((item) => {
+                    if (!item || !item.favorites) return [];
+                    return item.favorites.filter(
+                        (itm) =>
+                            itm && itm.stream_type && itm.stream_type !== 'live'
+                    );
+                })
+            );
     }
 
     getPortalLiveStreamFavorites(portalId: string) {
         return this.dbService
-            .getByID<{ favorites: Partial<XtreamItem>[] }>(
-                DbStores.Playlists,
-                portalId
-            )
-            .pipe(map((item) => item.favorites.filter(itm => itm && itm.stream_type && itm.stream_type === 'live') ?? []));
+            .getByID<{
+                favorites: Partial<XtreamItem>[];
+            }>(DbStores.Playlists, portalId)
+            .pipe(
+                map((item) => {
+                    if (!item || !item.favorites) return [];
+                    return item.favorites.filter(
+                        (itm) =>
+                            itm && itm.stream_type && itm.stream_type === 'live'
+                    );
+                })
+            );
     }
 
     addPortalFavorite(portalId: string, item: any) {
@@ -217,6 +231,7 @@ export class PlaylistsService {
     ) {
         try {
             const parsedPlaylist = parse(playlist);
+            console.log(parsedPlaylist);
             return createPlaylistObject(
                 title,
                 parsedPlaylist,