Prepare reel_text 0.4.2 reliability fixes

[KickNext]

Summary

• release the controller and measurement reliability fixes as reel_text 0.4.2
• dispose temporary TextPainter instances on success and failure paths
• discard pending transitions when switching ReelTextController instances
• validate animation durations, timer intervals, and bounce values before mutating controller state
• include the merged example dependency update from Bump google_fonts from 8.1.0 to 8.2.0 in /example in the example-dependencies group #30 (google_fonts 8.2.0)
• add regression coverage and release notes

Why

The measurement path retained its temporary TextPainter, controller replacement could leave a target queued by the previous controller, and invalid timing values were accepted until lower-level Flutter APIs failed. These changes make those ownership and transition boundaries explicit while preserving the current public API.

Impact

Invalid timing input now fails consistently with ArgumentError at the API consumption boundary. Valid animations and the visual rendering model are unchanged.

Release

• bumped pubspec.yaml and the example lockfile to 0.4.2
• added the 0.4.2 changelog entry
• synchronized the branch with main after merging Dependabot PR Bump google_fonts from 8.1.0 to 8.2.0 in /example in the example-dependencies group #30

Validation

• dart format --output=none --set-exit-if-changed lib test
• flutter analyze
• flutter test — 101 tests
• flutter test --platform chrome — 101 tests
• cd example && flutter analyze
• cd example && flutter test — 28 tests
• git diff --check
• dart pub publish --dry-run — 0 warnings
• flutter build macos --debug
• launched the fresh macOS example and visually checked Home, Editor, and PERF; exercised the Editor transition from Ready to Invite copied in active and settled states

[chatgpt-codex-connector]

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[KickNext]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Already looking forward to the next diff.

Reviewed commit: 53ac6528d0

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

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