- 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 regression test for two Lists in HStack sharing width correctly
- Test verifies both lists render, buffer fits available width, consistent line widths
- Add horizontal padding to TextFieldPage and SecureFieldPage
- SecureField with masked display using ● (U+25CF) bullets
- Reuses TextFieldHandler for key input handling
- SwiftUI API parity: init(_:text:) and init(_:text:prompt:)
- Supports .onSubmit() and .disabled() modifiers
- Focus indicator with pulsing vertical bars
- 15 tests for masking behavior and rendering
- Example app page with password validation demo
phranck