What’s new in Flutter 3.19

It seems like you’ve provided a detailed overview of the improvements, additions, and changes in Flutter 3.19. Here’s a summarized breakdown:

Framework:

1. Scrolling improvements, including enhancements to scrolling behavior and bug fixes for various scrolling widgets.
2. Introduction of AnimationStyle widget to override default animation behavior.
3. SegmentedButton.styleFrom method for quick creation of SegmentedButton styles.
4. Adaptive Switch component with native look on macOS and iOS.
5. Accessibility improvements with SemanticsProperties accessibility identifier.
6. Increased access to text widget state with MaterialStatesController support.
7. UndoHistory stack fixes for Japanese keyboards.

Engine:

1. Impeller progress updates, focusing on Android OpenGL preview and performance improvements.
2. API improvements such as Glyph Information and GPU tracing.
3. Performance optimizations including specialization constants and backdrop filter speedups.

Android:

1. Introduction of Deeplinking web validator tool.
2. Support for Share.invoke button and Native assets feature.
3. Texture Layer Hybrid Composition (TLHC) mode for improved performance.
4. Custom system-wide text selection toolbar buttons.

iOS:

1. Flutter iOS native fonts update for improved text appearance.
2. DevTools updates including new features and screens.

Desktop:

1. Initial support for Windows Arm64 architecture.

Ecosystem:

1. Introduction of required reason privacy manifest on iOS.
2. Progress update on the Flutter and Dart package ecosystem.

Deprecations and breaking changes:

1. Dropping support for Windows 7 and 8.
2. Removal of Paint.enableDithering flag.
3. Deprecation of iOS 11 support.
4. Deprecation of auto render mode.

Flutter 3.19 and Dart 3.3 are now available on the stable channel for developers to upgrade.

Overall, these updates aim to enhance performance, accessibility, and developer experience across various platforms and devices.