codelessly_api 5.1.0: badge, chip and segmented button nodes (#35)

Port BadgeNode, ChipNode and SegmentedButtonNode from the unmerged
migrate-json-serializable branch onto the 5.x conventions: standard
json_serializable with the json_defaults_builder omit-defaults step,
Equatable props, copyWith, field access, and Material 3 defaults that
follow Flutter 3.47's Badge, chip widgets and SegmentedButton.

Fields renamed to their Flutter names keep the branch's JSON keys
(dotSize, labelStyle, selectedSegments, selectedColor, unselectedColor),
so JSON written with the branch still loads. The segment model is
ButtonSegmentModel to avoid clashing with Flutter's ButtonSegment.

Register the three types with NodeJsonConverter, port the branch's
tests and badge fixtures, and add round-trip and branch-JSON tests.


Claude-Session: https://claude.ai/code/session_01A67XoQYsLVvoMtiKcXXUxY

Co-authored-by: Claude <noreply@anthropic.com>

Author: rayliverified

CHANGELOG.md

@@ -1,3 +1,40 @@
+## 5.1.0
+
+### New nodes
+
+- `BadgeNode` (`'badge'`): Material 3 `Badge` as a dot, label or count
+  (`BadgeType`), optionally anchored to another node through `childID`.
+  `BadgeProperties` mirrors Flutter's `backgroundColor`, `textColor`,
+  `textStyle`, `smallSize`, `largeSize`, `padding`, `isLabelVisible` and
+  `Badge.count`'s `maxCount`, plus `BadgeAlignment` and an `offsetX`/
+  `offsetY` offset (Flutter's default `Offset(4, -4)`).
+- `ChipNode` (`'chip'`): Material 3 `Chip`, `ActionChip`, `ChoiceChip`,
+  `FilterChip` and `InputChip` (`ChipType`). `ChipProperties` covers the
+  label and its style, an icon or image avatar, the delete icon and its
+  color, selection with `showCheckmark`/`checkmarkColor`, colors, border,
+  corner radius, elevation, paddings (Material 3 defaults: 8 px padding,
+  8 px horizontal label padding), `tooltip` and `autofocus`. Choice and
+  filter chips expose a `selected` property variable.
+- `SegmentedButtonNode` (`'segmentedButton'`): Material 3
+  `SegmentedButton<String>` built from `ButtonSegmentModel`s, with
+  `selected`, `multiSelectionEnabled`, `emptySelectionAllowed`,
+  `showSelectedIcon`, `selectedIcon`, `direction`, border, foreground and
+  background colors for both states and a stadium-shaped default corner
+  radius. The selection is exposed as the `selected` property variable.
+- All three are registered with `NodeJsonConverter`.
+
+### JSON
+
+- These nodes first appeared on the unreleased `migrate-json-serializable`
+  branch. JSON written with it still loads: keys are unchanged where a
+  field was renamed to its Flutter name (`dotSize` holds
+  `BadgeProperties.smallSize`, `labelStyle` holds
+  `BadgeProperties.textStyle`, `selectedSegments` holds
+  `SegmentedButtonProperties.selected`, `selectedColor`/`unselectedColor`
+  hold `selectedBackgroundColor`/`backgroundColor`), and field access uses
+  the same keys.
+- As with every other node, fields that equal their defaults are omitted.
+
 ## 5.0.0
 
 ### Breaking changes

lib/src/api/node_json_converter.dart

@@ -71,6 +71,9 @@ class NodeJsonConverter implements JsonConverter<BaseNode?, Map> {
       'gridView': GridViewNode.fromJson,
       'pageView': PageViewNode.fromJson,
       'tabBar': TabBarNode.fromJson,
+      'badge': BadgeNode.fromJson,
+      'chip': ChipNode.fromJson,
+      'segmentedButton': SegmentedButtonNode.fromJson,
       'external': ExternalComponentNode.fromJson,
     };
   }