NinePatch should rebuild after atlas resize/rebuild

[einarf]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a version counter to texture atlases and uses it in NinePatch geometry caching to ensure meshes are rebuilt after an atlas resize or rebuild.

• Introduce a _version attribute and version property in the base atlas class
• Increment _version on resize and rebuild in the default atlas implementation
• Update NinePatch’s geometry cache key and type annotation to include atlas.version

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
arcade/texture_atlas/base.py	Initialize _version and add a read-only version property
arcade/texture_atlas/atlas_default.py	Initialize _version, increment on resize and rebuild
arcade/gui/nine_patch.py	Expand geometry_cache to include atlas.version in cache key

Comments suppressed due to low confidence (1)

arcade/texture_atlas/atlas_default.py:740

• There aren’t any tests verifying that _version increments correctly after a resize or rebuild. Adding unit tests for resize and rebuild would help catch regressions.

        self._version += 1