fix(deps): update dependency flex_color_picker to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
flex_color_picker	dependencies	major	^3.8.0 → ^4.0.0

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Release Notes

rydmike/flex_color_picker (flex_color_picker)

v4.0.0

Compare Source

Aug 30, 2026

The version requires Flutter 3.47.0 or higher. Offers support for SDK decoupled Material and Cupertino libraries.

BREAKING

• This version requires Flutter 3.47.0 or higher
• It also opts in on Dart 3.13.0 language features and lints.
• This release brings full support for the standalone material_ui and cupertino_ui packages.
• Per Flutter's official recommendation the package is released as a major breaking release.
• Removed deprecated property colorCodeIcon. It had been deprecated already in v2.0.0, and no longer had any function since then. Use property [copyPasteBehavior] and [ColorPickerCopyPasteBehavior.copyIcon] instead.

FIX

• Keyboard paste on Windows, Linux, Android and Fuchsia used Ctrl-C instead of Ctrl-V, so paste overwrote the copy shortcut. Paste is now Ctrl-V. Cmd-C / Cmd-V on macOS and iOS were already correct.

DOCS

• Dart docs for showColorPickerDialog and ColorPicker.showPickerDialog now list parameters on the member page instead of inside the signature.
• Setup package for agentic development and usage use with git worktrees.
• Added a skill for agents that consume this package, see .agents/skills/flex-color-picker/SKILL.md.
• Updated API docs, typos and language and some stale docs.
• Refreshed the README for 4.0: Flutter 3.47 and material_ui / cupertino_ui highlight, stale claims and typos, undocumented APIs as text, a simpler heading structure, and prose that is not hard-wrapped. Screenshots are unchanged.

TESTS

• Added CopyPasteHandler shortcut tests for Ctrl-C / Ctrl-V on Windows and Cmd-C / Cmd-V on macOS.
• Raised package test coverage to 100% of instrumented lines. Added color_picker_coverage_test.dart for single-picker modes, clipboard formats/errors, toolbar OK/Close, opacity slider drags, and color-code editing. Compile-time-false _debug print blocks are excluded with documented coverage:ignore comments.

CHORE

• Bump dependencies
• Update to RydMike lints to 3.0.0 and fix lints.
• Example iOS and macOS builds: removed CocoaPods integration so the runners use Swift Package Manager only.
• Example web demo: replaced the deprecated Flutter service-worker bootstrap with flutter_bootstrap.js.
• Agent docs (AGENTS.md and skills) and CONTRIBUTING: package lib/ coverage must stay at 100% of instrumented lines.
• Untracked git-ignored coverage/lcov.info and Flutter-generated example plugin registrant files so dart pub publish --dry-run no longer warns about checked-in gitignored files. They are regenerated by tests / flutter pub get.

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