feat(module:color-picker): support nzPresets

[Nicoss54]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Application (the showcase website) / infrastructure changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Color picker supports preset options

Does this PR introduce a breaking change?

• Yes
• No

Other information

[codecov]

Codecov Report

❌ Patch coverage is 89.74359% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.14%. Comparing base (ddefc7f) to head (25c5cc2).
⚠️ Report is 29 commits behind head on master.

Files with missing lines	Patch %	Lines
...color-picker/src/ng-antd-color-preset.component.ts	82.60%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9341      +/-   ##
==========================================
+ Coverage   92.12%   92.14%   +0.01%     
==========================================
  Files         561      562       +1     
  Lines       19631    19670      +39     
  Branches     3000     3007       +7     
==========================================
+ Hits        18086    18125      +39     
+ Misses       1206     1205       -1     
- Partials      339      340       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Nicoss54]

@Laffery @HyperLife1119 ad the previous PR, I make the translation with google translate, I’m not sure if the documentation I’ve done is correct so feel free to tell me what I have to write if there are some mistakes :)

[Copilot]

Pull Request Overview

This PR introduces support for color preset groups in the ng-zorro ColorPicker component. Users can now provide predefined color collections organized in collapsible groups for quick color selection.

Key changes include:

• Added NzColorPickerPresetsItem interface to define preset group structure with label, colors, and optional properties
• Created NgAntdColorPresetComponent to render collapsible preset groups with color blocks
• Enhanced color block component to show selection state and brightness-based styling for presets

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
typings.ts	Added interface definition for preset items
style/index.less	Added CSS styling for preset containers and color states
ng-antd-color-preset.component.ts	New component handling preset rendering and interaction
ng-antd-color-preset.component.spec.ts	Comprehensive test coverage for preset component
ng-antd-color-picker.module.ts	Added preset component to module exports
ng-antd-color-picker.component.ts	Integrated preset component with main picker
ng-antd-color-picker.component.spec.ts	Added tests for preset integration
ng-antd-color-block.component.ts	Enhanced block component with selection and brightness detection
doc/index.*.md	Updated documentation with preset property
demo/presets.ts	Demo showcasing preset functionality
color-picker.component.ts	Updated main component to support presets
color-picker.component.spec.ts	Added preset-related test cases

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The logic for determining brightness when alpha <= 0.5 always returns true regardless of the actual color brightness. This should consider the actual color brightness even for semi-transparent colors.

Suggested change

	if (a !== undefined && a <= 0.5) return true;
	const brightness = r * 0.299 + g * 0.587 + b * 0.114;
	let blendedR = r, blendedG = g, blendedB = b;
	if (a !== undefined && a < 1) {
	blendedR = Math.round(r * a + 255 * (1 - a));
	blendedG = Math.round(g * a + 255 * (1 - a));
	blendedB = Math.round(b * a + 255 * (1 - a));
	}
	const brightness = blendedR * 0.299 + blendedG * 0.587 + blendedB * 0.114;

[Laffery]

basically LGTM, could you please take review on it @OriginRing