fix(Table): improve page scroll handling for affixed header and footer

[RylanBot]

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 新特性提交
• 文档改进
• 演示代码改进
• 组件样式/交互改进
• CI/CD 改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他

🔗 相关 Issue

• [Table] 表格表头吸顶，表头计算宽度逻辑有问题 #3894

💡 需求背景和解决方案

📝 更新日志

• fix(Table): 修复页面滚动时，自定义 container 的吸顶表头或表尾无法与表格对齐的问题

• 本条 PR 不需要纳入 Changelog

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[pkg-pr-new]

tdesign-react-demo

npm i https://pkg.pr.new/tdesign-react@3899

commit: e0eac3d

[github-actions]

[Copilot]

Pull Request Overview

This PR fixes horizontal scroll handling issues when using fixedRows with affixed header in the Table component. The main problem was that when the page scrolls horizontally, the affixed header and table content would become misaligned.

• Adds page-level horizontal scroll handling for fixedRows with sticky positioning
• Improves scroll state tracking using useRef instead of local variables
• Updates condition checks to include virtual scroll in affix logic

Reviewed Changes

Copilot reviewed 3 out of 5 changed files in this pull request and generated 3 comments.

File	Description
packages/components/table/hooks/useAffix.ts	Core fix adding page horizontal scroll listener and improving scroll tracking
packages/components/table/_example/fixed-header-col.tsx	Removes unused channel column from demo data
packages/components/table/_example/fixed-column.tsx	Updates demo with scroll button and improved layout

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[RylanBot]

修复前：

renderHeaderContent 和 readerFooterContent 被 useMemo 缓存了

2025-10-21.12.37.45.mp4

修复后：

自定义 container 时垂直滚动依赖 Affix 底层逻辑...目前看来有延迟，有明显运动轨迹，未来需要优化 Affix

2025-10-21.12.36.43.mp4