0.3.1

0.3.1 — fix a crash when the collection shrinks during layout

Fixed

• A crash when the collection shrinks while the container is being laid out, such as during a navigation pop. The visible window could be rebuilt from the scroll geometry action with a newer, shorter collection before the re-solve, and index past its end. Positions are now trusted only where the current collection still holds the same id, falling back to the element last placed for that frame. No API or performance changes.

Thanks to @volovely for the report and fix in #2.