- Course outline sidebar now sits on the left of the player instead
of the right (mobile stacking order unchanged - video still first).
- Collapsible to a slim rail via a toggle button, remembered per
device, for a full-width player when wanted.
- Which sections a user has manually expanded is now remembered
(keyed by the section's path) and shared between the lesson-page
sidebar and the dashboard's course view, so re-opening a course
doesn't reset everything back to collapsed.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
rmsitzandClaude Sonnet 5
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