fix(ui): New badge flicker on mainstage album rail hover (#986)

* fix(ui): stop New badge flicker on mainstage album rail first hover

Dim cover via ::before under badges; keep play overlay transparent and
avoid visibility toggles on rail action buttons.

* docs: CHANGELOG for mainstage New badge hover fix (PR #986)

* fix(ui): keep New badge above rail cover zoom (match grid stacking)

Use contain:paint + translateZ layering like New Releases grid so scaled
cover art does not paint over the badge during hover animation.

* fix(ui): global album cover badge stacking for all rails and grids

Move img/badge/overlay z-index into album-card.css; stop album-grid from
resetting card transform or duplicating cover rules that hid New badges.

* docs: CHANGELOG — badge stacking applies to all album rails

* fix(ui): restore rail play buttons above scaled cover layer

Raise play overlay and badge z-index on horizontal rails so WebKit does not paint zoomed cover art over hover controls after the New badge stacking fix.

CHANGELOG.md

@@ -563,6 +563,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * **Album grids and song rails:** overlay `pointer-events` so the dim layer does not steal hover from the card.
 
 
+### Mainstage album rails — stable New badge on first hover
+
+**By [@cucadmuh](https://github.com/cucadmuh), PR [#986](https://github.com/Psychotoxical/psysonic/pull/986)**
+
+* Horizontal album rails (Home New Releases, Discover, Favorites, Statistics, search rows, …) no longer hide the **New** / offline cover badges during hover zoom — cover stacking is shared with grid pages; rails keep dim-on-`::before` for play controls.
+
 
 ### Album view — bulk add to playlist selection