v0.2.7: fix for game imports failing on non-UTF-8 Windows systems

This is a small release that adds a single fix on top of v0.2.6. Thanks to @dovelflab for the detailed diagnosis.

What changed

• On Windows systems whose text encoding is not UTF-8 (for example English Windows), the game library index was written in the system encoding and every later game import failed. The index is now always read and written as UTF-8, and an index that was already written incorrectly is repaired automatically after updating — no manual steps needed.

Before updating

Back up saves and review migration notes for your installed version. Release notes describe upstream changes, not independent compatibility testing by this site.