Trac: Restore WP.org color scheme for tickets

[obenland]

Fixes #8391

Summary

Trac 1.6 changed the ticket page markup: content is now wrapped in a new #ticketbox div nested inside #ticket, and the description heading was renamed from h3 to h2. wp-trac.css's overrides were still written against the pre-1.6 structure, so several selectors silently stopped matching:

• #ticket > h2 no longer matched the id/status/type badge line (it's now a grandchild of #ticket, not a direct child), losing its font-size override.
• #ticket's background/border no longer reached the actual box — Trac's own ticket.css now colors the nested #ticketbox (yellow background, double border).
• Trac's ticket.css now also colors the ticket title (#trac-ticket-title, an h1 wrapping the summary) via a grouped #ticketbox > h1, #ticketbox > h2 { color: #844 } rule. That h1 target didn't exist pre-1.6, so the summary text picked up Trac's maroon color with no WP.org override in place.
• #ticket div.description h3 stopped matching the description heading, which Trac renamed to h2, losing its color/border-bottom override.

Changes

• Move the box background/border/radius and badge-line font-size overrides from #ticket to #ticketbox.
• Add a color reset for #ticketbox > h1 (the ticket title/summary).
• Update the description heading selector from h3 to h2.
• Drop the unrelated but noticed-along-the-way dead -webkit-border-radius declarations throughout the file (unprefixed border-radius has been supported everywhere since ~2012).

Test plan

• Load a ticket page and confirm the ticket box has a single gray border with no yellow background.
• Confirm the ticket summary/title text is no longer maroon.
• Confirm the "Description" section heading uses the neutral WP.org gray, not the native Trac color/border.

[github-actions]

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[Copilot]

🟢 Ready to approve

The selector updates are consistent with the described Trac 1.6 markup changes and do not introduce any apparent regressions within the stylesheet.

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Pull request overview

Updates the WordPress.org Trac stylesheet to restore the WP.org ticket page appearance after Trac 1.6 markup changes (new #ticketbox wrapper and heading level updates), ensuring the intended WP.org overrides apply again.

Changes:

• Moves the ticket box visual styling (background/border/radius) and header font-size override to target #ticketbox instead of #ticket.
• Resets the ticket title color by overriding Trac’s #ticketbox > h1 coloring.
• Updates the Description section heading selector to match Trac 1.6’s h2, and removes legacy -webkit-border-radius declarations.

File summaries

File	Description
wordpress.org/public_html/style/trac/wp-trac.css	Adjusts selectors for Trac 1.6 ticket markup so WP.org ticket styling (box chrome, title color, description header) is correctly applied again.

Review details

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

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