test: re-record browser-extension fixtures on the current GitHub DOM, by era

GitHub A/B-tests its PR page markup, so the extension carries selectors for more
than one DOM era. Split the fixture corpus into date-stamped era directories so
both are exercised: github_dom_2025_02/ (the existing captures, moved and now
sanitized — they were leaking the original capturers' identities into this public
repo) and github_dom_2026_07/ (freshly recorded from synthetic PRs on the
mergify-sandbox org: opened, merged, no_mergify, no_timeline_actions,
batch_closed).

The fixture loader takes an era; the flat searchConfig* and mergify_timestamp
fragment fixtures are unaffected. Existing tests pin the legacy era explicitly; a
new suite asserts the era-agnostic detection (data-status pill, merged-by-Mergify
timeline, Mergify app-avatar marker) against the current DOM.

Recorded via the record-github-fixtures + extract-browser-cookies skills
(Mergifyio/skills#32, #33).

MRGFY-8087

Test plan:
- npx jest (284 passing) — legacy suite green through the era loader; new
  current-DOM parity suite green.
- npx biome check — clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KJbLFjMX9mb8o5T3JXTAXL
Change-Id: I966a2d36a92c50664bdea6918b1987293014b822

Author: JulianMaurin

src/__tests__/currentDomEra.test.js

@@ -0,0 +1,52 @@
+const { injectFixtureInDOM, CURRENT_ERA } = require("./utils");
+const {
+    isPullRequestOpen,
+    isPullRequestDraft,
+    wasMergedByMergify,
+} = require("../queue.js");
+
+// Parity coverage on the current-DOM era fixtures (github_dom_2026_07), recorded
+// from the mergify-sandbox org on the markup GitHub serves today. These exercise
+// the era-agnostic detection — the data-status pill, the merged-by-Mergify
+// timeline, and the Mergify app-avatar marker — against the current DOM, so a
+// GitHub change that breaks them fails here instead of silently in production.
+// Selector fixes that ride with the batch work are covered in the batch suite.
+describe("current-DOM era fixtures (github_dom_2026_07)", () => {
+    afterEach(() => {
+        document.body.innerHTML = "";
+    });
+
+    const APP_AVATAR =
+        'img[src^="https://avatars.githubusercontent.com/in/10562"]';
+
+    test("github_pr_opened: open, not draft, Mergify enabled", () => {
+        injectFixtureInDOM("github_pr_opened", CURRENT_ERA);
+        expect(isPullRequestOpen()).toBe(true);
+        expect(isPullRequestDraft()).toBe(false);
+        expect(wasMergedByMergify()).toBe(false);
+        expect(document.querySelector(APP_AVATAR)).not.toBeNull();
+    });
+
+    test("github_pr_merged: closed and merged by Mergify", () => {
+        injectFixtureInDOM("github_pr_merged", CURRENT_ERA);
+        expect(isPullRequestOpen()).toBe(false);
+        expect(wasMergedByMergify()).toBe(true);
+    });
+
+    test("github_pr_no_timeline_actions: closed, not merged", () => {
+        injectFixtureInDOM("github_pr_no_timeline_actions", CURRENT_ERA);
+        expect(isPullRequestOpen()).toBe(false);
+        expect(wasMergedByMergify()).toBe(false);
+    });
+
+    test("github_pr_no_mergify: open, no Mergify app avatar", () => {
+        injectFixtureInDOM("github_pr_no_mergify", CURRENT_ERA);
+        expect(isPullRequestOpen()).toBe(true);
+        expect(document.querySelector(APP_AVATAR)).toBeNull();
+    });
+
+    test("github_pr_batch_closed: closed", () => {
+        injectFixtureInDOM("github_pr_batch_closed", CURRENT_ERA);
+        expect(isPullRequestOpen()).toBe(false);
+    });
+});