🤖 tests: remoteConnection.spec.ts popup clipboard write is denied on Linux E2E (flaky) #5993

tests/e2e/scenarios/remoteConnection.spec.ts:284 ("remote app popups and blob attachments retain isolation and close on disconnect") failed twice on 2026-10-09 in Test / E2E (linux 2/4), on PRs that touch no clipboard, remote-connection or Electron code. Both times it failed on its Playwright retry too, and a job rerun passed.

Failure

The remote app popup's navigator.clipboard.writeText is rejected, so the page shows the error text instead of "Copied":

Error: expect(locator).toHaveText(expected) failed
Received: "NotAllowedError: Failed to execute 'writeText' on 'Clipboard': Write permission denied."
> 340 |     await expect(popup.locator("#copied")).toHaveText("Copied");

Sightings

1. 🤖 fix: light-theme muted and secondary text tokens meet WCAG AA #5973, attempt 1: https://github.com/coder/xum/actions/runs/37994477974/job/114036957884. The same job also failed remoteConnection.spec.ts:84 ("remote connection isolates the page and returns to the same local renderer"). Attempt 2 passed.
2. 🤖 fix: allow zoom, and keep phone text fields at 16 px so iOS does not zoom on focus #5992, attempt 1: https://github.com/coder/xum/actions/runs/38006342745/job/114075947944. 17 other tests passed. The rerun of the failed jobs passed.

Next step

Find why the popup sometimes lacks clipboard-write permission on the Linux runner, for example a focus or permission race when the popup opens. Until then the spec is a known flake: rerun the failed job once.

Owner: coordinator desk.

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