Codex Desktop: DataAnalysisWidget content stretches after expanding the side panel

Summary

In Codex Desktop on Windows, a report rendered by DataAnalysisWidget becomes unnaturally stretched after opening it in the right-side panel and clicking the panel's Expand/Maximize control.

The extra width is applied directly to the report content instead of preserving a readable content width and responsive padding. Long paragraphs become difficult to scan, and wide tables can still show horizontal overflow.

Environment

• Codex Desktop: 26.707.9981.0
• Platform: Microsoft Windows NT 10.0.26200.0 x64
• Surface: generated DataAnalysisWidget report in the Codex Desktop right-side panel
• Main Codex window: maximized

Steps to reproduce

1. Open Codex Desktop on Windows.
2. Open a thread containing a generated DataAnalysisWidget report.
3. Open the report in the right-side panel.
4. Click the Expand/Maximize control in the upper-right of the DataAnalysisWidget panel.
5. Observe the report layout.

Expected behavior

Expanding the panel should provide more room while keeping:

• a reasonable maximum reading width for prose;
• responsive left/right padding;
• tables constrained to their own responsive container;
• no page-level horizontal overflow.

Actual behavior

The report content stretches across the expanded width. Text lines become excessively long, spacing/padding no longer looks balanced, and table content can overflow horizontally.

Additional information

This is specific to the Codex Desktop DataAnalysisWidget/report view, not the main conversation layout.

A related issue, #23704, reports a similar stretching symptom in the VS Code extension's Codex side panel, but this report affects a different product surface and renderer.

Screenshots demonstrating the before/after layout are available and can be provided if needed.