refactor(整合): 将更新日志改为模态框实现并补充最近20条更新记录

- 将 ChangelogPage 改为 ChangelogModal 模态框组件
- 移除 /changelog 和 /updates 路由，改为模态框弹出
- 修改 Header 按钮点击行为，触发模态框而非路由跳转
- 根据最近20条 git 提交记录补充更新数据
- 优化模态框样式，支持响应式布局和深色模式
- 修复 JSON 中的引号转义问题

via [HAPI](https://hapi.run)

Co-Authored-By: HAPI <noreply@hapi.run>

src/data/changelog.json

@@ -1,11 +1,144 @@
 {
   "changelogEntries": [
     {
-      "id": "2026-03-08-changelog-page",
+      "id": "2026-03-08-changelog-modal",
       "date": "2026-03-08",
       "type": "feat",
       "title": "新增更新时间轴浏览页面与顶部快捷入口",
       "scope": "整合"
+    },
+    {
+      "id": "2026-03-08-practice-fix-offset",
+      "date": "2026-03-08",
+      "type": "fix",
+      "title": "修正底部固定区域偏移方式",
+      "scope": "练习"
+    },
+    {
+      "id": "2026-03-08-practice-optimize-layout",
+      "date": "2026-03-08",
+      "type": "feat",
+      "title": "优化辅助信息显示和布局",
+      "scope": "练习"
+    },
+    {
+      "id": "2026-03-07-practice-show-itto",
+      "date": "2026-03-07",
+      "type": "feat",
+      "title": "答对后显示ITTO明细信息",
+      "scope": "练习"
+    },
+    {
+      "id": "2026-03-04-stakeholder-fix-p10-4",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修复P10.4监督干系人参与输出重复项目管理计划",
+      "scope": "相关方"
+    },
+    {
+      "id": "2026-03-04-stakeholder-fix-p10-3",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修复P10.3管理干系人参与输出重复项目管理计划",
+      "scope": "相关方"
+    },
+    {
+      "id": "2026-03-04-stakeholder-fix-identify",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修正识别干系人输出项目管理计划更新",
+      "scope": "相关方"
+    },
+    {
+      "id": "2026-03-04-procurement-fix-output",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修正实施采购输出项目文件更新明细",
+      "scope": "采购"
+    },
+    {
+      "id": "2026-03-04-risk-fix-quantitative-tool",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修正实施定量风险分析工具从决策树分析改为数据分析",
+      "scope": "风险"
+    },
+    {
+      "id": "2026-03-04-risk-fix-identify-output",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修正识别风险输出项目文件更新明细",
+      "scope": "风险"
+    },
+    {
+      "id": "2026-03-04-communication-add-detail",
+      "date": "2026-03-04",
+      "type": "feat",
+      "title": "为管理沟通输出项目沟通记录添加明细",
+      "scope": "沟通"
+    },
+    {
+      "id": "2026-03-04-communication-add-report-tool",
+      "date": "2026-03-04",
+      "type": "feat",
+      "title": "新增项目报告工具并修正管理沟通工具列表",
+      "scope": "沟通"
+    },
+    {
+      "id": "2026-03-04-communication-add-analysis-tool",
+      "date": "2026-03-04",
+      "type": "feat",
+      "title": "新增沟通需求分析工具并修正规划沟通管理工具列表",
+      "scope": "沟通"
+    },
+    {
+      "id": "2026-03-04-resource-add-eef-update",
+      "date": "2026-03-04",
+      "type": "feat",
+      "title": "新增事业环境因素更新并修正资源管理过程输出",
+      "scope": "资源"
+    },
+    {
+      "id": "2026-03-04-quality-fix-tool-name",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修正TT066名称从「测试与检查的规则」改为「测试/产品评估」",
+      "scope": "质量"
+    },
+    {
+      "id": "2026-03-04-quality-add-decision-tool",
+      "date": "2026-03-04",
+      "type": "feat",
+      "title": "新增决策技术工具并应用于规划质量管理和管理质量",
+      "scope": "质量"
+    },
+    {
+      "id": "2026-03-04-close-fix-output",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修复P1.7输出应为项目文件更新而非项目管理计划更新",
+      "scope": "整合"
+    },
+    {
+      "id": "2026-03-04-process-name-fix",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修正P1.2和P3.5过程名称「制定」为「制订」",
+      "scope": "整合"
+    },
+    {
+      "id": "2026-03-04-change-control-fix",
+      "date": "2026-03-04",
+      "type": "fix",
+      "title": "修复P1.6输出移除变更日志保留项目管理计划更新",
+      "scope": "整合"
+    },
+    {
+      "id": "2026-03-03-dify-integration",
+      "date": "2026-03-03",
+      "type": "feat",
+      "title": "集成Dify智能对话助手",
+      "scope": "整合"
     }
   ]
 }