chore: only add when sticky

[zombieJ]

follow up #1250

Summary by CodeRabbit

• Refactor
  • 优化了表格组件的样式处理逻辑，特别是针对固定表头时的列数展示，提升了整体界面的一致性和稳定性，为用户提供更流畅的查看体验。

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[coderabbitai]

Walkthrough

本次修改在 Table 组件中引入了一个新的 tableStyle 对象，用于整合原有的 style 属性，并在 isSticky 条件为真时动态添加 CSS 变量 --columns-count（值为 flattenColumns.length）。该对象随后用于设置主 table div 的样式，从而取代之前的内联样式定义。组件的整体结构和逻辑保持不变，目的在于提高代码的清晰度和可维护性。

Changes

文件	更改摘要
src/Table.tsx	新增 tableStyle 对象，通过展开现有 style 属性，并在 isSticky 为真时添加 CSS 变量 --columns-count，替换了旧的内联样式写法。

Sequence Diagram(s)

sequenceDiagram
    participant T as Table 组件
    participant S as StyleHandler
    participant D as DOM
    T->>S: 生成 tableStyle（展开 style 属性）
    alt isSticky 为真
        S->>S: 添加 '--columns-count'（使用 flattenColumns.length）
    end
    S->>D: 将 tableStyle 应用于 table div 的 style 属性

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Suggested reviewers

• afc163

Poem

我是一只快乐的小兔子，
跳跃在代码森林间，
Table 风格焕然一新，
数字和变量共舞轻快，
代码花园充满希望 🐰🌸。

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src/Table.tsx

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ESLint: 8.57.1

ESLint couldn't find the config "prettier" to extend from. Please check that the name of the config is correct.

The config "prettier" was referenced from the config file in "/.eslintrc.js".

If you still have problems, please stop by https://eslint.org/chat/help to chat with the team.

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📜 Recent review details

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Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 570c0f5 and cee8122.

⛔ Files ignored due to path filters (3)

• tests/__snapshots__/ExpandRow.spec.jsx.snap is excluded by !**/*.snap
• tests/__snapshots__/FixedColumn.spec.tsx.snap is excluded by !**/*.snap
• tests/__snapshots__/Table.spec.jsx.snap is excluded by !**/*.snap

📒 Files selected for processing (1)

• src/Table.tsx (2 hunks)

🔇 Additional comments (2)

src/Table.tsx (2)

765-772: 将样式属性集中管理并优化条件应用

代码将表格样式集中到一个专用的 tableStyle 对象中，并且只在启用了粘性（sticky）布局时动态添加 CSS 变量 --columns-count。这种方式相比于直接在 JSX 中编写样式更加清晰。

这是对 #1250 PR 的一个很好的后续优化，使得样式逻辑更加清晰和有条件性。

---

790-790: 应用新的样式对象结构

将之前内联样式定义替换为新的 tableStyle 对象，这样代码更简洁且易于维护。

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.03%. Comparing base (570c0f5) to head (cee8122).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1251   +/-   ##
=======================================
  Coverage   98.03%   98.03%           
=======================================
  Files          76       76           
  Lines        7423     7425    +2     
  Branches     1145     1146    +1     
=======================================
+ Hits         7277     7279    +2     
  Misses        140      140           
  Partials        6        6           

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