fix(attributes): use palette text color

[Resurgamz]

问题\n修复右侧工具属性栏中颜色属性标签与圆角控件文字颜色不一致的问题。\n\n## 修复方案\n颜色属性标签绘制时使用当前调色板的 QPalette::WindowText，替代硬编码的深浅主题色值，使其与 DTK 控件保持一致并随主题自动适配。\n\n## 验证\n- cmake --build obj-x86_64-linux-gnu -j2\n\n## PMS\n- BUG-231619\n- 根因分析：analysis-report.md

Summary by Sourcery

Bug Fixes:

• Fix inconsistent text color for color attribute labels and rounded corner controls in the attributes sidebar by using the active palette window text color.

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Resurgamz

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• debian/deepin/OWNERS

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR updates the drawing logic for color attribute labels in the right-side attributes panel so that their text color is taken from the current palette’s WindowText instead of hard-coded theme colors, ensuring consistency with DTK controls and automatic theme adaptation.

File-Level Changes

Change	Details	Files
Use the widget’s QPalette WindowText color for the static "填充" and "描边" label text instead of hard-coded dark/light theme colors.	Replace conditional dark/light theme QColor selection with palette-based text color lookup. Apply palette().color(QPalette::WindowText) in the fill area label painting routine. Apply palette().color(QPalette::WindowText) in the border label painting routine.	src/frame/AttributesWidgets/private/cattributeitemwidget.cpp

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[deepin-ci-robot]

deepin pr auto review

★ 总体评分：100分

■ 【总体评价】

代码优化了颜色获取方式，使用系统调色板替代硬编码颜色值
逻辑正确且无安全漏洞，提升了主题适配性和代码可维护性

■ 【详细分析】

• 1.语法逻辑（完全正确）✓

在 paintFillArea 和 paintFillBorder 函数中，将三元运算符判断硬编码颜色的逻辑替换为调用 palette().color(QPalette::WindowText)，语法正确且符合Qt框架的绘制规范。
潜在问题：无
建议：无需修改

• 2.代码质量（优秀）✓

移除了硬编码的颜色字符串（"#C0C6D4" 和 "#414D68"）以及对 darkTheme 变量的依赖，直接使用系统主题提供的颜色，减少了魔法值，提高了代码的可读性和跨主题兼容性。
潜在问题：无
建议：无需修改

• 3.代码性能（无性能问题）✓

palette().color() 是一个非常轻量级的内联访问操作，不会对绘制性能产生负面影响。
建议：无需修改

• 4.代码安全（存在0个安全漏洞）✓

漏洞对比统计：新增漏洞 0 个，减少漏洞 0 个，持平 0 个
本次修改仅涉及UI绘制颜色的获取方式变更，不涉及任何外部输入处理、文件操作或网络通信，不存在安全风险。

• 建议：无需修改

■ 【改进建议代码示例】

// 当前代码已是最优实现，无需修改。
// 保持以下代码即可：
// painter->setPen(palette().color(QPalette::WindowText));

[sourcery-ai]

Hey - I've left some high level feedback:

• The darkTheme flag is no longer used in these paint methods; consider removing it (and any related unused paths) to keep the drawing logic lean and avoid confusion.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The `darkTheme` flag is no longer used in these paint methods; consider removing it (and any related unused paths) to keep the drawing logic lean and avoid confusion.

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