fix(sync): adopt valid replacements during save readback - #487

Ports the Docs at release sections of #486 and #487. Notes that the
player, the Transcript panel, and the podcast menu open go beside the
PodNotes view in the main area. A file that sync replaces during a save
merges without the save notice.

* docs(transcripts): describe published transcripts and the from-audio command

* docs: port sync, private feed, capture, note, and local file changes

* docs: port player, API, template, settings, and import changes

* docs(readme): mention free transcripts from the feed

* docs: apply round 1 review fixes and move save problems to their own page

* docs: apply round 2 review fixes

* docs: apply round 3 review fixes

* docs(settings): keep the Search Podcasts section until the UI docs pass

* docs: apply round 4 review fixes

* docs: apply round 5 review fixes

* docs: apply round 6 review fixes

* docs: apply round 7 review fixes

* docs: apply round 8 review fixes

* docs: apply round 9 review fixes

* docs: apply round 10 review fixes

* docs: apply round 11 review fixes

* docs: apply round 12 review fixes

* docs: apply round 13 review fixes

* docs: apply round 14 review fixes

* docs: apply round 15 review fixes

* docs: describe the v3 view, player, and settings for 2.22.0

Rewrites the pages that described the 2.21.1 view and settings, adds a page for the player, and rewrites docs/scripts/screenshots.mjs on the verify skill's screens tooling with the fixture library. The screenshots are provisional until the final visual pass merges.

* docs: apply round 1 review fixes

Adds an Update to 2.22.0 page, fixes the loaded-episode and offline wording, makes in-page links site-absolute, and adds a phone twin for the transcript shot.

* docs: apply round 2 review fixes

Corrects what happens after importing a 2.21.1 settings file, fits alt texts to their phone crops, and crops the first-run shot.

* docs: apply round 3 review fixes

* docs: apply round 4 review fixes

* docs: describe the headset buttons as new for 2.21.1 users

* docs: describe the final v3 UI and capture the final screenshots

Applies #485's Docs at release items: Remove from Local files, Exit fullscreen, Open note in the Transcript panel, Set feed address off while offline, and the Download path warning.

* docs: apply round 5 review fixes

Name icon buttons by what a reader sees now that #485 gave them per-episode
names, split the no-transcript paragraph into a list, scope the iPhone
fullscreen sentence, and end phone note crops below the last whole block.

* docs: share the screenshot script's scene helpers

Move the seed plan, the docs' fixture library, episode notes made with
PodNotes' commands, and the instance's CDP channel out of screenshots.mjs
into scene.mjs, so the clip recorder can use them too.

* docs: record the guide clips with videos.mjs

node docs/scripts/videos.mjs records five clips in the isolated Obsidian
with real mouse and touch input and a drawn pointer, at 2x through
Electron's zoom, and writes H.264 MP4s with WebP posters and dark twins
to docs/public/videos.

* docs: show the guide clips on their pages

Getting started, Capture timestamps, Use the player, Transcribe episodes,
Use the queue and playlists, and Use private feeds each get a clip after
a sentence that says what it shows. A clip plays muted on a loop, and
readers who prefer reduced motion get its poster and controls instead.
The docs README now describes the current screenshot script.

* docs: apply the clip review fixes

Pause clips when the reader turns on reduced motion, scroll Up next in
the phone clip so the whole new queue shows, hide the drawn mouse arrow
in touch clips, keep times out of clip alt text, where the site's
directive syntax drops them, and take posters after the click ring fades.

* docs: end the queue clip on the new order and clear the feed poster

The phone clip now holds on Up next with the moved episode first, scrolls
to the last episode, and scrolls back, and the private feed's poster has
the pointer off the pasted address.

* docs: open notes beside the player and merge synced files during a save

Ports the Docs at release sections of #486 and #487. Notes that the
player, the Transcript panel, and the podcast menu open go beside the
PodNotes view in the main area. A file that sync replaces during a save
merges without the save notice.

* docs: record the queue clip without the grip's focus ring

Since #486 a touch drag leaves no focus ring on the queue grip.

* docs: say where a note opens in each layout

Round 1 review: readers could not tell where a note opens with the view
in a sidebar. One section on the notes page now covers the sidebar, the
main area or a popout, phones, and a note that opens while another tab
is active. Fix save problems and Sync now name both causes of the save
notice.

* docs: name each case of where a note opens

Round 2 review: Where a note opens now says which tab a note takes in
each layout, includes commands run from a note, and does not imply that
a capture opens the note. Getting started and the update page note the
phone exception. Sync says that a change written over between the read
and the write shows no notice.

* docs: note that 2.21.1 and 2.22.0 don't share an episode's later progress