feat: label merge-queue batch PRs with a pill and fix detection on the current DOM

[JulianMaurin]

A merge-queue batch PR now renders a "Merge-queue batch PR" pill in the injected
row, so the button-less batch shape reads as intentional rather than empty. The
pill uses the buildStatePill visual language — informational accent-blue, no pulse.

Batch detection is repointed at the current React PR DOM, which no longer serves
the selectors it relied on: isPullRequestAuthoredByMergify scopes to the opening
comment (.js-command-palette-pull-body) instead of .gh-header-meta, and getBaseRef
reads the base branch off the first branch-name link's /tree/ href instead
of .commit-ref.base-ref. Both keep the legacy selector as a fallback for the older
DOM era. Adds a real batch-PR fixture (github_pr_batch_open) recorded on today's
DOM, with fixture-backed tests for detection, base ref, the pill, the button-less
row, and the absent dequeue button.

MRGFY-7874

Test plan:

• npx jest (283 passing) — detection/base-ref/pill/row on the real fixture; legacy
  synthetic + old-fixture paths still green.
• npx biome check — clean.

Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com
Claude-Session: https://claude.ai/code/session_01KJbLFjMX9mb8o5T3JXTAXL

Depends-On: #618

[mergify]

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🔴 ⛓️ Depends-On Requirements

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• depends-on=Mergifyio/browser-extension#617 [⛓️ fix: point the extension's dashboard links at the current path-scoped URLs #617 [stack]]
• depends-on=Mergifyio/browser-extension#618 [⛓️ test: re-record browser-extension fixtures on the current GitHub DOM, by era #618 [stack]]

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Requirement based on the presence of Depends-On in the body of the pull request

• depends-on=Mergifyio/browser-extension#617 [⛓️ fix: point the extension's dashboard links at the current path-scoped URLs #617 [stack]]
• depends-on=Mergifyio/browser-extension#618 [⛓️ test: re-record browser-extension fixtures on the current GitHub DOM, by era #618 [stack]]

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• #approved-reviews-by>=2

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• any of:
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  • author = dependabot[bot]

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• #review-requested = 0

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• #review-requested = 0
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🟢 Enforce conventional commit

Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(fix|feat|internal|docs|style|refactor|perf|test|build|ci|chore|revert|ui)(?:\(.+\))?!?:

🟢 📕 PR description

• body ~= (?ms:.{48,})

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[Copilot]

Pull request overview

This PR improves merge-queue batch PR UX and robustness in the browser extension by (1) clearly labeling batch PR rows that intentionally have no action buttons, and (2) updating batch detection/base-branch parsing to match GitHub’s current React PR DOM while preserving legacy fallbacks.

Changes:

• Add a “Merge-queue batch PR” state pill (informational accent-blue, no pulse) to label button-less batch PR rows.
• Repoint DOM selectors for batch detection (isPullRequestAuthoredByMergify) and base ref parsing (getBaseRef) to work on the current GitHub PR DOM with legacy fallbacks.
• Add a real current-DOM batch PR fixture and fixture-backed tests covering detection, base ref, pill rendering, and absence of dequeue/actions.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
src/queue.js	Updates DOM selectors for batch detection/base ref and renders a batch “state pill” for button-less batch rows.
src/tests/queue.test.js	Adds fixture-backed tests asserting batch detection/base ref and the new batch pill + button-less row behavior.

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[JulianMaurin]

Revision history

#	Type	Changes	Reason	Date
1	initial	1f8a8dc		2026-07-17 20:05 UTC
2	content	1f8a8dc → cb9d3b0 (raw)	Amend: fold in the dashboard-link URL-format fix (path-scoped /orgs//repos//…; the retired ?login=&repository= form no longer resolves) — author-reported the activity-log link was dead. Co…	2026-07-17 20:05 UTC
3	content	cb9d3b0 → 4a04e75 (raw)	Split the single commit into two stacked PRs per author request: base = dashboard-link URL-format fix (path-scoped), top = MRGFY-7874 batch pill + detection + fixture. Same final tree.	2026-07-18 05:40 UTC
4	content	ff253b0 → 8629292	Inserted a middle commit (MRGFY-8087): re-record the fixture corpus on current GitHub DOM via record-github-fixtures + extract-browser-cookies skills (Mergifyio/skills#32,#33), date-stamped into gith…	2026-07-18 06:20 UTC
5	rebase	8629292 → 729ac6b (rebase only)	Reworked #618's current-DOM parity into a dual-era suite (fixtureDomEras.test.js): the same detection checks (isPullRequestOpen/isPullRequestDraft/wasMergedByMergify/app-avatar) now run against BOTH …	2026-07-18 06:31 UTC

[JulianMaurin]

This pull request is part of a Mergify stack:

#	Pull Request	Link
1	fix: point the extension's dashboard links at the current path-scoped URLs	#617
2	test: re-record browser-extension fixtures on the current GitHub DOM, by era	#618
3	feat: label merge-queue batch PRs with a pill and fix detection on the current DOM	#616	👈