- Replace custom Observable protocol and @Published with Apple's @Observable macro
- Add withObservationTracking in renderToBuffer for automatic per-property dependency tracking
- Add type-based @Environment(Type.self) and .environment(object) for observable objects
- Add ObjectEnvironmentModifier for injecting observable objects into the environment
- Add needsCacheClear flag to AppState for thread-safe cache invalidation
- Add cross-platform test script (scripts/test-linux.sh) for Docker-based Linux verification
- Add DemoAppHeader with system info display (OS, version, architecture)
- Consolidate Example App: extract ImageDemoHelpers, KeyboardHelpSection, ValueDisplayRow
- Add pre-push verification rule to CLAUDE.md
- Verified on both macOS and Linux (swift:6.0 container), 1155 tests passing
- Add Image view rendering local files and URLs as colored ASCII art
- Add CSTBImage C target wrapping stb_image for cross-platform image decoding
- Add ASCIIConverter with block, ASCII, and braille character sets
- Support trueColor, ANSI-256, grayscale, and mono color modes
- Add Floyd-Steinberg dithering for improved visual quality
- Add async image loading with URLImageCache for URL sources
- Add bracketed paste mode for bulk text insertion in text fields
- Add TextContentType modifier for input character filtering
- Add ContentMode enum and aspectRatio(_:contentMode:) View modifier
- Add text-input priority in key dispatch to prevent shortcut conflicts
- Add Image (File) and Image (URL) demo pages to example app
- Update DocC documentation with new symbols and layout table
phranck