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feat(playlist): virtualize tracklist + memoize rows (#755)

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* feat(playlist): virtualize tracklist + memoize rows

* fix(playlist): separator in virtual row key to avoid id/index collision

* chore(release): CHANGELOG + credits for playlist virtualization (PR #755)
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‮Artem
2026-05-18 13:18:49 +03:00
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CHANGELOG.md
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@@ -268,7 +268,13 @@ Foundational work: faster reviews, narrower diffs, and a safety net under the pa
* **Responsive layout:** **3** cards in one row on 2K-class screens, **2** cards in one row at 1080p (the orphan third card on a second row is hidden via container query), and all **3** stacked vertically on truly narrow / mobile widths.
* Toggleable in the Home customizer like every other rail; respects the existing performance flags ("Disable rail artwork", "Disable Home album rows").
### Playlists — virtualized tracklist for large playlists
**By [@artplan1](https://github.com/artplan1), PR [#755](https://github.com/Psychotoxical/psysonic/pull/755)**
* Opening a very large playlist (10 000+ tracks) no longer mounts every row into the DOM. The playlist tracklist is windowed with `@tanstack/react-virtual` on the shared app scroll viewport — the same convention as Artists, Composers, and the library card grids.
* Row rendering moved into a memoized `PlaylistRow` with a stable callback bundle so virtualizer scroll updates do not re-render the full list.
* Drag-and-drop reordering is preserved: drop-indicator overlay and edge auto-scroll during drags.
## Changed