Administration: Replace pure white body background on Font Library and Connectors pages

[itzmekhokan]

Trac ticket: https://core.trac.wordpress.org/ticket/65100

Summary

Ticket #65100 reports several accessibility issues in the admin Font Library, and in comment #5 @afercia noted that the new Connectors page at wp-admin/options-connectors.php (introduced in 7.0) uses the same pattern and shares those issues — including a pure white body background that is inconsistent with the rest of core admin and against documented accessibility/UX best practice ("Never use full white", comment #5).

Both page-wp-admin.php wrapper files add this inline style:

body {
    background: #fff;
}

This causes the white content cards (.components-item) to blend into the body background and is inconsistent with every other core admin screen, which use #f0f0f1 (defined in src/wp-admin/css/common.css, line 225).

This PR changes that override to #f0f0f1 on both pages so they match the rest of the core admin UI and give the white cards visible contrast with their surroundings — directly addressing the background-color concern from comments #5 and #6 on the ticket.

Files changed

• src/wp-includes/build/pages/font-library/page-wp-admin.php
• src/wp-includes/build/pages/options-connectors/page-wp-admin.php

Both are single-line changes: background: #fff; → background: #f0f0f1;.

Not in scope for this PR

The other accessibility items from the ticket are rendered by the Gutenberg @wordpress/admin-ui Page/Header component (compiled into src/wp-includes/build/routes/**), so the fix has to land in Gutenberg and will sync down on the next package update:

• H1 vs H2 heading level — already fixed upstream in WordPress/gutenberg#77482.
• Inappropriate <header> landmark on the page title block — comment Fix 35293 #4; tracked in WordPress/gutenberg#77481.
• ARIA landmarks nesting on the Connectors page — comment Fix #41562. #5; same Gutenberg component.

Once those Gutenberg fixes land and the build sync regenerates these files, the background: #f0f0f1; value in this PR is consistent with the plan in comment #6 (latest Gutenberg uses a near-white, not pure white).

Test plan

• Load wp-admin/options-connectors.php (Settings → Connectors) and confirm the body background matches the rest of wp-admin (#f0f0f1) and the connector cards visually stand out.
• Load wp-admin/font-library.php (Appearance → Fonts) and confirm the same.
• Confirm no visual regression elsewhere on those two screens.
• Compare side-by-side with wp-admin/options-general.php to confirm consistency.

Props joedolson, afercia, hbhalodia, wildworks.

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Props khokansardar.

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[t-hamano]

Let me close this based on https://core.trac.wordpress.org/ticket/65100#comment:8.