Improve e2e clipboard tests

Instead of trying to copy the RID of the first repo card, try to copy
the one you later expect.

tests/e2e/clipboard.spec.ts

@@ -1,6 +1,7 @@
 import { chromium } from "playwright";
 
 import { expect, markdownRid, test } from "@tests/support/fixtures.js";
+import { formatRepositoryId } from "@app/lib/utils";
 
 // We explicitly run all clipboard tests withing the context of a single test
 // so that we don't run into race conditions, because there is no way to isolate
@@ -18,7 +19,7 @@ test("copy to clipboard", async () => {
 
   // Repo ID.
   {
-    await page.getByLabel("repo-id").first().click();
+    await page.getByText(formatRepositoryId(markdownRid)).click();
     const clipboardContent = await page.evaluate<string>(
       "navigator.clipboard.readText()",
     );