Sources: release notes 3.32.0, breaking changes, CHANGELOG.md
`CardTheme`, `DialogTheme` and `TabBarTheme` were refactored to conform to Flutter's conventions for component themes. `CardThemeData`, `DialogThemeData` and `TabBarThemeData` were added to define overrides for the defaults of the component visual properties.
The `flutter` tool will no longer output the `.flutter-plugins` metadata file, and only output `.flutter-plugins-dependencies`.
The `flutter` tool will no longer generate a synthetic `package:flutter_gen` or modify the `package_config.json` of the app.
Unless a user-defined `goldenFileComparator` is set, either manually in a test, or using a `flutter_test_config.dart` file, Android and iOS devices and emulators/simulators have a new default that proxies to the local host filesystem, fixing a long-standing bug (#143299).
The formula for `SpringDescription` changed to correct an earlier error, affecting underdamped springs (damping ratio less than 1) with mass values other than 1. Springs created prior to this change may exhibit different bouncing behaviors after upgrading.
`SystemContextMenuController.show` is deprecated. The same functionality can be achieved by passing the result of calling `SystemContextMenu.getDefaultItems` to `SystemContextMenuController.showWithItems`.
`ExpansionTileController` is deprecated. The same functionality can be achieved by using `ExpansibleController` instead.
When routes are pushed, developers can await them to be notified when they are popped. However, this didn't work when they were removed because the associated future was never completed.
The `ThemeData.indicatorColor` parameter was deprecated in favor of the `TabBarThemeData.indicatorColor` parameter.
The `InputDecoration.maintainHintHeight` parameter was deprecated in favor of the `InputDecoration.maintainHintSize` parameter.