fix: fix sticky header column width with empty data

[afc163]

ant-design/ant-design#54741

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table	Ready	Preview	Comment	Aug 29, 2025 7:26am

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.74%. Comparing base (8fd0790) to head (434ccd6).
⚠️ Report is 3 commits behind head on antd-5.x.

Additional details and impacted files

@@             Coverage Diff              @@
##           antd-5.x    #1323      +/-   ##
============================================
- Coverage     97.74%   97.74%   -0.01%     
============================================
  Files            77       77              
  Lines          7625     7623       -2     
  Branches       1155     1154       -1     
============================================
- Hits           7453     7451       -2     
  Misses          166      166              
  Partials          6        6              

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[Copilot]

Pull Request Overview

This PR fixes an issue with sticky header column widths when the table has empty data. The fix ensures that column widths are properly maintained in sticky headers when there's no data by using the original column group instead of calculated widths.

Key changes:

• Modified FixedHolder to conditionally use original colGroup for empty data scenarios
• Removed maxContentScroll property handling that was causing width calculation issues
• Added test cases to verify the fix for various empty data scenarios

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/FixedHolder/index.tsx	Updates column width logic to use original colGroup when no data is present
src/Table.tsx	Passes bodyColGroup to FixedHolder components and removes maxContentScroll prop
docs/examples/stickyHeader.tsx	Adds test cases for sticky headers with empty data scenarios
tests/__snapshots__/FixedColumn.spec.tsx.snap	Updates test snapshots to reflect new column width behavior

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[crazyair]

如果只有 noData 会不会不够，虽然没数据列头不换行了，那还有个场景（列的数据比列头少，也会换行吧？）

我目前的解法是，取 title 的元素，在第一行里 height =0 再渲染一次，撑起宽度

[crazyair]

使用了 max-content，这里不应该再加 width 的，这样会忽略掉问题。