[A11Y-196] Associate the link text label with its input

[alexwarren]

Jira: https://stackoverflow.atlassian.net/browse/A11Y-196

Summary

• Correct the shared editor link dialog's Link text label association.
• Add regression coverage for both visible labels.
• Add a patch changeset for release.

Ticket checklist

• Link text has a programmatic label matching its visible label.
• Shared implementation covers question and article editors once the patch release is consumed.

Verification

• npm run test:unit -- --runInBand (1,093 passing)
• npm run lint (passes; two existing warning-only tests)
• npm run build (passes with existing bundle-size warnings)
• git diff --check

[changeset-bot]

🦋 Changeset detected

Latest commit: f2262bd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@stackoverflow/stacks-editor	Patch

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[Copilot]

🔵 Needs a closer look

Strengthen the regression test to verify each label targets its intended input.

Pull request overview

This PR fixes the shared link editor’s “Link text” label association, adds regression coverage, and includes a patch changeset.

Changes:

• Corrects the text input ID.
• Adds label association tests.
• Adds a patch release changeset.

File summaries

File	Summary
test/rich-text/plugins/link-editor.test.ts	Adds accessibility coverage, but does not verify each label targets the intended input (moderate, 1 vote).
src/rich-text/plugins/link-editor.ts	Fixes the label-to-input association.
.changeset/a11y-link-text-label.md	Records the patch release.

Review details

Suppressed comments (1)

test/rich-text/plugins/link-editor.test.ts:71

• This only verifies that each for value resolves to some <input>, so a regression that swaps the href and text IDs would still pass while the “Link text” label targets the URL field. Assert the first label resolves to .js-link-editor-href and the second to .js-link-editor-text (or compare each resolved node with those expected selectors).

            labels.forEach((label) => {
                expect(label.htmlFor).not.toBe("");
                expect(
                    container.querySelector(`#${label.htmlFor}`)
                ).toBeInstanceOf(HTMLInputElement);

• Files reviewed: 3/3 changed files
• Comments generated: 0
• Review effort level: Lite

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[Copilot]

🟢 Approval recommended

The accessibility fix, regression coverage, and patch changeset are complete with no unresolved blocking issues.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0 new
• Review effort level: Lite