fix(stats): review fuzzy AniList duplicates before merging

- Preserve merged title aliases for future episodes
- Fail closed when queued writes cannot drain

changes/library-merge-and-move.md

@@ -1,6 +1,6 @@
 type: added
 area: stats
 
-- Library: duplicate cards for the same show can now be combined. Press "Select" above the library grid, tick the cards, and use "Merge Selected"; the dialog picks which entry to keep and moves every episode onto it. Sessions, mined cards, and watch time are preserved, and the emptied entries disappear from the grid.
+- Library: duplicate cards for the same show can now be combined. Press "Select" above the library grid, tick the cards, and use "Merge Selected"; the dialog picks which entry to keep and moves every episode onto it. Sessions, mined cards, and watch time are preserved, the emptied entries disappear, and remembered title aliases keep future episodes on the merged card.
 - Library: episodes can be reassigned to another library entry from the "→" button on an episode row, which is the fix when one file lands under a stray title (e.g. an episode name parsed as the series). Emptying an entry this way removes it and returns to the grid.
-- Library: once cover art resolves a title to an AniList entry, cards that resolve to the same AniList id are folded together automatically instead of being left as duplicates. Entries whose parsed seasons disagree are left alone.
+- Library: exact AniList title matches with compatible seasons fold duplicate cards automatically. Fuzzy same-AniList matches appear as dismissible "Possible duplicate" reviews instead of changing the library without confirmation; conflicting explicit seasons are left alone.