[liubquanti]

Sync bookmark status to logged in sync accounts

Depends on #3300: without it, AniList rejects updates
that have no score, so this change would appear to do nothing for AniList.

Problem

The TV result page has no sync (AniList / MAL) controls at all; it only has the local
bookmark button. On TV the only interaction with a tracker is the player bumping the
episode count, and that only works for titles that are already on the user's list.
For a title that isn't, the status is NONE, so updateStatus takes the delete path
and nothing happens. As a result there is no way to add a title to AniList / MAL from
a TV.

Change

When the bookmark status of a title changes (ResultViewModel2.updateWatchStatus), the
same status is now set on every logged in sync account that has an id for the title
in syncData:

• WatchType is mapped to SyncWatchType (same ids for 0–4, NONE mapped explicitly,
  since the two enums use different ids for it).
• The current remote status is fetched first, so an existing score and episode
  progress are kept; only the status changes.
• Removing the bookmark (NONE) removes the entry from the tracker list as well.
• Once an update succeeds the library is reloaded again. The reload fired by the
  bookmark change usually fetches the remote list before the update has landed and
  then clears requireLibraryRefresh, leaving the library stale.

Accounts the user isn't logged into, and titles without a tracker id, are untouched.

Open question

This changes behaviour for everyone who is logged into a tracker: bookmarks were
purely local before. If you prefer, I can put it behind a setting
(e.g. "Sync bookmarks to tracker accounts"), off or on by default.

Testing

Tested on a Chromecast with Google TV (Android 14) with an AniList account:

• Setting Plan to watch on a title that wasn't on the list adds it to AniList
  as Planning (syncWatchStatus AniList 154587 => PLANTOWATCH: Success(true)).
• The title then shows up in the AniList library tab without restarting the app.

[fire-light42]

Yes, such a fundamental change needs a toggle. We cannot change the expected behavior in the app too much, since many users have gotten used to the existing behavior.

[liubquanti]

I’ve added a toggle to the account settings to enable synchronisation, which is disabled by default. I tested it on the same Chromecast using my AniList account.