fix(naked-ui): correct selection semantics and press state

[leoafarias]

Description

Corrects two shared interaction contracts used by Remix components.

NakedToggleOption now marks options as members of a mutually exclusive group, matching Flutter's segmented-control semantics while preserving explicit child nodes, controlled selection, and disabled behavior.

NakedTextField now keeps its public press callbacks and WidgetState.pressed synchronized when multi-tap selection, drag selection, scrolling, or force press takes ownership. Disabled tap, drag, directional-navigation, and force-press paths are gated before Flutter's selection behavior runs.

Adversarial review exposed one lifecycle edge case in that implementation: Flutter's tap tracker also resets when its recognizer is disposed. Forwarding that reset synchronously could invoke a consumer callback that rebuilt an ancestor while the widget tree was locked. The reset now clears internal pressed state immediately, defers consumer callbacks until rebuilding is safe, skips them after unmount, and invalidates stale deferred resets when a newer press transition wins.

This is a behavioral and accessibility correction with no public API or rendered design change, so screenshots are not applicable.

Validation

• Regression test reproduced setState() or markNeedsBuild() called when widget tree was locked on the prior implementation and passes with the lifecycle-safe reset.
• flutter test test/src/naked_textfield_press_state_test.dart test/src/naked_textfield_test.dart test/semantics/naked_textfield_semantics_test.dart test/src/naked_toggle_test.dart test/semantics/naked_toggle_semantics_test.dart — 109 passed.
• flutter test — 678 passed, 3 intentionally skipped external integration tests.
• flutter analyze --fatal-infos — no issues.
• dart format --output=none --set-exit-if-changed ... — 0 changed.
• git diff --check — clean.
• Final adversarial review — no remaining findings.

Related Issues

No linked issue was supplied.

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Checklist

• My PR includes unit or integration tests for all changed/updated/fixed behaviors.
• Existing public doc comments remain accurate; no API documentation change is required.
• I am prepared to follow up on review comments in a timely manner.

Breaking Change

Does this PR require users of the package to manually update their code?

• Yes, this is a breaking change.
• No, this is not a breaking change.

[github-actions]

LCOV of commit bfa0b68 during Flutter CI #274

	(use "lcov --ignore-errors deprecated,deprecated ..." to suppress this warning)
Reading tracefile /tmp/__zgosalvez_github-actions-report-lcov/lcov.info.
Summary coverage rate:
  source files: 22
  lines.......: 90.0% (2990 of 3323 lines)
  functions...: no data found
  branches....: no data found
Message summary:
  1 warning message:
    deprecated: 1

Files changed coverage rate:
  	(use "lcov --ignore-errors deprecated,deprecated ..." to suppress this warning)
                                                                   |Lines       |Functions  |Branches    
  Filename                                                         |Rate     Num|Rate    Num|Rate     Num
  packages/naked_ui/lib/src/naked_textfield.dart                   |89.6%    383|    -     0|    -      0
  packages/naked_ui/lib/src/naked_toggle.dart                      |94.4%    480|    -     0|    -      0

[github-actions]

LCOV of commit 39055a4 during Flutter CI #275

	(use "lcov --ignore-errors deprecated,deprecated ..." to suppress this warning)
Reading tracefile /tmp/__zgosalvez_github-actions-report-lcov/lcov.info.
Summary coverage rate:
  source files: 22
  lines.......: 90.0% (3002 of 3335 lines)
  functions...: no data found
  branches....: no data found
Message summary:
  1 warning message:
    deprecated: 1

Files changed coverage rate:
  	(use "lcov --ignore-errors deprecated,deprecated ..." to suppress this warning)
                                                                   |Lines       |Functions  |Branches    
  Filename                                                         |Rate     Num|Rate    Num|Rate     Num
  packages/naked_ui/lib/src/naked_textfield.dart                   |89.9%    395|    -     0|    -      0
  packages/naked_ui/lib/src/naked_toggle.dart                      |94.4%    480|    -     0|    -      0

[tilucasoli]

LGTM