test: pin the Coach layout clock to midday and read copied text without a tag-stripping replace

The panel groups conversations by the browser's local day, so the e2e
fixture's "an hour ago" landed in yesterday when CI ran just after
midnight. The turn-steps test reads its markup by splitting rather than
with a replace CodeQL reads as an incomplete sanitiser.

e2e/coach-layout.spec.ts

@@ -41,7 +41,10 @@ import { aiBlockAvailable, serveAiBlock } from "./setup/ai-capabilities";
  * Screenshots are attached to the report (no pixel baselines).
  */
 
-const NOW = Date.now();
+// A fixed midday, pinned in the browser too (see beforeEach): the panel groups
+// conversations by the browser's local day, so a run just after midnight in
+// the runner's or the profile's zone would move "an hour ago" into yesterday.
+const NOW = Date.parse("2026-06-04T12:00:00Z");
 const HOUR = 60 * 60 * 1000;
 
 interface Conversation {
@@ -406,6 +409,7 @@ test.describe("Coach page frame", () => {
       testInfo.project.name !== "chromium-desktop",
       "each case sets its own viewport; the desktop project runs them all",
     );
+    await page.clock.setFixedTime(new Date(NOW));
     await serveAiBlock(page, aiBlockAvailable());
     await page.emulateMedia({ reducedMotion: "reduce" });
   });

src/components/insights/coach-panel/__tests__/turn-steps.test.tsx

@@ -363,12 +363,12 @@ describe("a step row copied out of the list", () => {
       "de",
     );
     // What a selection copies: every text node except the unselectable ones.
+    // Reads this test's own static markup; not a sanitiser for input.
     const copied = html
-      .replace(
-        /<span[^>]*class="[^"]*\bselect-none\b[^"]*"[^>]*>[^<]*<\/span>/g,
-        "",
-      )
-      .replace(/<[^>]+>/g, "")
+      .split(/<span[^>]*class="[^"]*\bselect-none\b[^"]*"[^>]*>[^<]*<\/span>/)
+      .join("")
+      .split(/<[^>]*>/)
+      .join("")
       .replace(/\s+/g, " ")
       .trim();
     expect(copied).toBe("Gewicht · letzte 90 Tage");