@persist disconnects Alpine :class bindings from store reactivity on re-render.
Solution: drive sidebar width via html[data-sidebar-collapsed] CSS attribute
(same mechanism as skeleton) instead of Alpine :class.
- _syncDataset() now uses isCollapsed (respects mobile: never narrow on <768px)
- Blocking script checks window.innerWidth >= 768 before setting attribute
- Resize handler calls _syncDataset() to update attribute on viewport change
- aside gets sidebar-aside class; CSS sets 15rem/4rem at md+ via attribute
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
boban
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