The library loader streams its one-shot bundle (also the auth gate), so the
active sub-tab shows a skeleton while it loads — a grid skeleton for the
Collections tab, a row skeleton for Bookmarks/History/Page-tags — instead of
only the global nav bar.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
3c8e264f48