fix(catalog): 目录页码使用默认文本色

[F-windy]

问题

侧边栏目录页码在浅色主题下看不清，对比度不足。

根因

CatalogTreeView::getItemList() 中，页码列（column 1）前景色被设为 textTips()：

QColor color = Dtk::Gui::DGuiApplicationHelper::instance()->applicationPalette().textTips().color();
item1->setForeground(QBrush(color));

两个问题：

1. 低对比度：textTips() 是半透明颜色（浅色主题下 alpha 0.6 黑色 ≈ #666666），语义为提示/占位文本，不应用于页码这类内容信息。页码比标题列（使用默认不透明文本色）更难看清。

2. 不随主题切换：颜色在 item 创建时缓存为静态 QBrush，主题切换后调色板更新但缓存的画笔不刷新，导致页码颜色不响应主题变化。

修复

移除 setForeground() 调用，页码回退到视图默认调色板文本色——完全不透明、高对比度、绘制时动态解析，随主题切换自动适配。

改动

1 个文件，2 行删除，0 行新增。

  item1->setTextAlignment(Qt::AlignRight | Qt::AlignVCenter);
- QColor color = Dtk::Gui::DGuiApplicationHelper::instance()->applicationPalette().textTips().color();
- item1->setForeground(QBrush(color));
  qCDebug(appLog) << "CatalogTreeView::getItemList() - Returning item list";

DTK 规范合规性

• TextTips 语义为提示性文本，页码是内容信息，语义误用已纠正
• 移除静态颜色缓存，改为绘制时动态解析调色板，符合主题切换规范
• #include <DGuiApplicationHelper> 仍被 paintEvent 使用，无未使用 include

验证

• 构建成功
• 运行时 ForegroundRole 日志确认 col=1 返回 valid=false，视图使用默认不透明文本色
• 目录树正确填充 200+ 条目

PMS: BUG-375491

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: F-windy

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Removes the cached textTips() foreground brush from catalog page numbers so they use the tree view’s fully opaque, theme-adaptive default text color, improving readability in light and dark themes.

Sequence diagram for theme-adaptive catalog page number rendering

sequenceDiagram
    participant CatalogTreeView
    participant QStandardItemModel
    participant QTreeView
    participant Palette

    CatalogTreeView->>QStandardItemModel: getItemList(title, page)
    CatalogTreeView->>QStandardItemModel: setTextAlignment(AlignRight | AlignVCenter)
    QTreeView->>QStandardItemModel: data(ForegroundRole)
    QStandardItemModel-->>QTreeView: invalid ForegroundRole
    QTreeView->>Palette: text()
    Palette-->>QTreeView: theme-adaptive default text color
    QTreeView-->>CatalogTreeView: render page number

Loading

File-Level Changes

Change	Details	Files
Restore palette-driven rendering for catalog page numbers by removing the explicit hint-text foreground override.	Stop assigning the semi-transparent textTips() color to page-number items. Allow the tree view to use its default palette text color, including theme updates.	reader/sidebar/CatalogTreeView.cpp

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deepin pr auto review

🤖 AI 代码审查报告

总体评分： 100 分 (通过阈值: 70分)

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📊 总体评价

项目	结果
审查结论	代码审查通过
评分详情	本次提交修复了目录页码颜色问题，移除了将页码前景色设置为textTips颜色（灰色提示色）的代码，使页码使用默认文本色。变更简洁明确，无安全漏洞，无语法逻辑错误，代码质量良好。

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🔍 详细分析

1. 语法逻辑 ✅

评价： 优秀 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 本次变更仅删除了设置前景色的两行代码，语法正确，逻辑清晰。移除QBrush前景色设置后，QStandardItem将自动使用默认文本色，符合修复目的。

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2. 代码质量 ✅

评价： 优秀 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 变更简洁明了，删除不必要的颜色设置代码使代码更加简洁。保留的qCDebug日志为标准Qt日志机制，符合编码规范。

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3. 代码性能 ✅

评价： 优秀 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 移除了对DGuiApplicationHelper::instance()->applicationPalette().textTips().color()的调用，减少了不必要的调色板查询开销，对性能有轻微正面影响。

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4. 代码安全 🔒

评价： 优秀 ✅ 通过

🔐 发现 0 个安全漏洞

安全漏洞详情：
✅ 未发现安全漏洞

建议： 本次变更仅涉及UI颜色设置，不涉及用户输入、认证、敏感数据等安全相关操作，无安全风险。

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💡 改进建议代码示例

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