- New route /shorts/{video} opens the feed scrolled to that short.
Controller aborts 404 when the id doesn't resolve to a short or
isn't viewable by the current viewer, so bad links land on the
branded 404 (added in the next commit) rather than loading an
empty feed.
- The IntersectionObserver that detects the active short now
history.replaceState()s the URL to /shorts/{id} so copy-paste of
the address bar works, without pushing a navigation entry — the
back button still exits the feed in one step.
- Mute state is persisted in localStorage (shortsMuted = '0' | '1')
so unmuting once sticks across sessions. Default remains muted
to satisfy autoplay policies on first load.
- Mouse-wheel navigation moves one short per gesture with a 450 ms
debounce. Trackpad flicks no longer skip five shorts at once.
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
