fix: preserve slide styles in tile effect transitions (#1015)

* fix: preserve slide styles in tile effect transitions

Fix issue where tile effect transitions were removing all styles from
slide elements. Now only removes the visibility property instead of
clearing the entire style attribute, preserving custom styling.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* chore: add changeset for tile effect styles fix

---------

Co-authored-by: Phil Parsons <p-m-p@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>

Author: p-m-p

.changeset/tile-effect-styles-fix.md

@@ -0,0 +1,5 @@
+---
+'@boxslider/slider': minor
+---
+
+Fix tile effect transitions preserving slide styles. Previously, tile effects were removing all styles from slide elements when cloning them for transitions. Now only the visibility property is removed, preserving any custom styling applied to slides.

packages/slider/src/effects/tile/fade-transition.ts

@@ -63,7 +63,7 @@ class FadeTransition implements TileTransition {
 
   setTileFace(slide: HTMLElement, tileFace: HTMLElement) {
     const clone = slide.cloneNode(true) as HTMLElement
-    clone.removeAttribute('style')
+    clone.style.removeProperty('visibility')
     tileFace.replaceChildren(clone)
   }
 }

packages/slider/src/effects/tile/flip-transition.ts

@@ -88,7 +88,7 @@ class FlipTransition implements TileTransition {
 
   setTileFace(slide: HTMLElement, tileFace: HTMLElement) {
     const clone = slide.cloneNode(true) as HTMLElement
-    clone.removeAttribute('style')
+    clone.style.removeProperty('visibility')
     tileFace.firstElementChild!.replaceChildren(clone)
   }
 }