fix: skip artist channel results, live notification list update

- Add --match-filter 'webpage_url !*= /browse/' to baseArgs so yt-dlp
  skips YTM artist channel pages returned as search results (previously
  caused recursive channel-upload fetches that wasted time)
- Call _renderNotifList() in _addNotif so playlist-created notifications
  appear immediately without needing a page reload

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ui.js

@@ -432,6 +432,7 @@ function _addNotif(notif) {
   list.unshift(notif);
   _saveNotifs(list);
   _renderNotifBell();
+  _renderNotifList();
 }
 
 export function deleteNotif(id) {