Every course-loading path (Library browser, Continue Watching, Next
Up, ...) goes through loadCoursePath(), which reloads the page after
POSTing to /load_course - a plain reload never touches history, so
once you were on the course view, back had nothing of ours to land on
and fell straight through to exiting the app.
Push a history entry before that reload, and teach the back handler
that popping back to the course view means "unload the course and
reload" (there's no client-side way to patch back to the library
view's markup - it's a distinct server render tied to current_course).
Also restore the exact library folder trail on that reload instead of
resetting to the root, so back genuinely returns to where you were
browsing, not just the top level.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
rmsitzandClaude Sonnet 5
393f78206a