### Motivation
- Prevent a browser-policy muted-autoplay retry from overwriting a viewer's explicit mute/unmute preference and ensure fallback mutes are transient.
- Ensure that when a user logs in while a video comment modal is open, the open thread is reloaded (not just refreshed) so comments continue to display correctly after relay-backed services are reconfigured.
### Description
- Add `js/utils/autoplayPreference.js` with `muteForAutoplayFallback` and `consumeAutoplayFallbackMute` helpers to mark and consume transient fallback mutes.
- Update `js/services/playbackService.js` to treat sound as default unless the viewer explicitly chose mute, persist explicit choices via `localStorage`, ignore fallback-generated volume changes using `consumeAutoplayFallbackMute`, and expose `muteForAutoplayFallback` delegating to the new util.
- Replace direct `videoElement.muted = true` calls with `playbackService.muteForAutoplayFallback` in `js/app/playbackCoordinator.js` and `js/webtorrent.js` so fallback mutes are marked as transient.
- Change `js/app/authSessionCoordinator.js` to reload the currently open video comment thread with `commentController.load(activeModalVideo)` after login if a modal video is active, instead of only calling `refreshAuthState`.
- Update tests in `tests/services/playbackService.test.mjs` and add a test in `tests/app/login-defers-dms.test.mjs` to cover the login behavior that reloads an open comment thread.
### Testing
- Ran the `PlaybackService` unit tests (`tests/services/playbackService.test.mjs`) which assert `prepareVideoElement` behavior, explicit mute persistence, and the transient nature of fallback mute, and they passed.
- Ran the auth login unit tests including `tests/app/login-defers-dms.test.mjs` which verifies DM deferral and reload of an open comment thread, and they passed.
(cherry picked from commit ce14004725)
Trending-pattern clone ranked by sats from kind-9735 receipts:
- js/zapTotals.js: per-pointer receipt aggregation. The feed's metric getter
returns the cached total and schedules a batched fetch (#a/#e chunks via
the L1 SubscriptionManager) for unknown/stale pointers; amounts parse via
nip57 bolt11 with the zap request's amount tag as fallback; receipts are
deduped by id so re-fetches never double-count; zero-receipt answers are
cached (2-min TTL).
- sorters.js: shared count-ranked sorter (metric desc, recency tie-break,
author spread, trusted-muted sink); Trending delegates unchanged, Most
Zapped ranks on runtime.getZapTotal.
- Full wiring: feed definition, view + info popover, change-signal re-rank
(order settles as receipts stream in), sidebar link, viewManager registry,
feedCoordinator case/loader, FEED_TYPES.MOST_ZAPPED, and a
FEATURE_MOST_ZAPPED_FEED flag (default on; off hides the tab).
Co-Authored-By: Claude Fable 5 <[email protected]>
thePR0M3TH3AN