Prevent PR overview overflow in Agents window

[Copilot]

Opening a linked PR in the Agents window could expand the overview beyond the viewport, pushing the sidebar off-screen.

• Layout containment
  • Allow the main grid column to shrink below its content’s intrinsic width.
  • Preserve existing sidebar sizing and responsive behavior.

grid-template-columns: minmax(0, 1fr) minmax(200px, 300px);

• Fixes #334797

[azure-pipelines]

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[Alex Ross (alexr00)]

Copilot I still get a little bit of a horizontal scroll bar when oepning an issue webview from a PR webview.

[Alex Ross (alexr00)]

Copilot try again

[Copilot]

Copilot try again

Addressed in 4419d67. Plain unbroken issue-body text now wraps; Chromium validation with the linked issue’s content shows no document overflow from 280px through 1400px viewports.

[Copilot]

🟢 Approval recommended

The CSS changes directly implement the stated layout containment fix and are consistent with existing overflow-prevention rules in the webview.

Pull request overview

This PR tightens layout containment for the PR overview webview so that intrinsic-width content (e.g., long lines in linked PR content in the Agents window) can’t force the main column wider than the viewport and push the sidebar off-screen.

Changes:

• Update the main grid’s first track to minmax(0, 1fr) to allow shrinking below intrinsic width.
• Ensure .comment-body itself (not just some descendants) gets overflow-wrap: anywhere to prevent long, unbroken content from expanding layout.

File summaries

File	Description
webviews/editorWebview/index.css	Adjusts the #app grid column sizing to prevent overflow and expands overflow-wrap coverage to .comment-body to avoid horizontal expansion from long content.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Lite

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