Hide a filling table's colgroup on narrow pages instead of !important

[HarryCordewener]

Before: on a page under 48em, LayoutCss gave up a filling table's column shares with .ms-table.ms-fill > colgroup > col { width: auto !important; }. SharpMUSH's portal copies LayoutCss.Fixed into shell.css and refuses !important in its global stylesheets, so its two tests contradict each other and SharpMUSH #1648 can't go green on 2.11.0.

After: the rule is .ms-table.ms-fill > colgroup { display: none; }. In Chromium at 600px, an 80%/20% colgroup lays out at 348/235 px. With the colgroup hidden it lays out at 69/514, the same as a table with no colgroup.

How: one CSS rule and its test. The changelog gets the 2.11.0 heading the grow entry shipped under, with this fix under Unreleased. It needs a 2.11.1 release for SharpMUSH to pick up.

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https://claude.ai/code/session_018eAjtsQTFqWAeWQMc7ebNo

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Generated by Claude Code

Summary by CodeRabbit

• Bug Fixes
  • On narrow screens, filling tables now hide their column group when the columns can’t fit, rather than forcing column widths.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between dd51634 and 7d22b04.

📒 Files selected for processing (3)

• CHANGELOG.md
• MarkupString.Html/LayoutCss.cs
• MarkupString.Tests/Layout/WidgetLayoutTests.cs

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Walkthrough

At viewport widths up to 48em, filled tables now hide their <colgroup> instead of setting its columns to automatic widths. The test expectation and Unreleased changelog entry reflect this change.

Changes

Filled table layout

Layer / File(s)	Summary
Hide filled table column groups MarkupString.Html/LayoutCss.cs, MarkupString.Tests/Layout/WidgetLayoutTests.cs, CHANGELOG.md	The narrow-width CSS rule hides the <colgroup> for filled tables. The test now expects it to be hidden, and the changelog records the behavior. The changelog also adds the 2.11.0 release heading dated 2026-10-07.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: claude

Merge Risk: ⚪ Minimal · up to 7d22b

The narrow-page table change is reflected in its test and changelog. No actionable merge risk is established by the supplied changes; proceed with normal checks.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. (1 skipped: 1 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: hiding a filling table’s colgroup on narrow pages instead of using !important.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. (1 skipped: 1 unsupported.)

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