The rail, browser back, and Esc already cover navigation — the back
button was a third way to do what two other things already do, and it
cost the page its first line.
- Remove #movie-back and #series-back buttons and their event listeners
- Focus lands on the title element (tabindex=-1) instead of the removed
button on open
- TV releases back button is untouched
- Hero banner now meets the rail with zero top padding on movie/series
- Esc and parent-route behaviour unchanged
- Deep link fallback for TV releases uses #nav-library instead of the
removed #series-back