Inner sidebar content was pinned to a fixed openWidth (derived from store state) so it kept its full size during open/close animation. But store state only updates on pointer-release during a drag, which meant inner content didn't reflow while the user was actively dragging — only after they let go.
Keep openWidth as the inner width when the sidebar is idle (so slide-out animation still shows full-width content under the clipping aside), but during an active resize bind the inner content to a CSS variable that applyLiveWidth updates on every pointermove. The aside continues to use direct px width for transition reliability; the variable is just a side channel for the inner element.
Bohdan Triapitsyn
4c2eeb4d78