Persist dismissed game IDs locally (SharedPreferences on Android,
java.util.prefs on Desktop) so completed games can be permanently
hidden from the chess lobby. Adds per-game dismiss button and
"Clear all" action when 2+ finished games exist.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Create PlatformImage expect/actual abstracting Bitmap/BufferedImage
- Move pure blurhash algorithms (Base83, SRGB, CosineCache, BlurHashEncoder) to commonMain
- Rewrite BlurHashDecoder to return PlatformImage instead of Bitmap
- Add PlatformImage.toBlurhash() extension in commonMain
- Add platform-specific Bitmap.toBlurhash() and BufferedImage.toBlurhash()
- Add base64Image toPlatformImage() for both Android and JVM
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>