[Bug]: Nightly changelog is unreachable with a screen reader when provider updates are pending #36444

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/web

Steps to reproduce

1. Use the desktop app with a screen reader in browse mode.
2. Have a nightly T3 Code update with release notes available and at least one provider update pending, so the sidebar update button reads "Update everything".
3. Activate the update button.
4. Browse the page to look for the changelog.

For comparison, repeat with only the nightly T3 Code update pending (no provider updates).

Expected behavior

A screen reader user can read the nightly changelog before updating, the same way they can when only the nightly update is pending.

Actual behavior

• Nightly only: after activating the update button, the changelog is reachable in browse mode, and its link opens the full changelog.
• Nightly + provider updates: activating the button opens the modal "Update N machines?" dialog. The dialog contains no changelog, and the content behind it is hidden from the screen reader, so the changelog cannot be reached at any point in this flow.

Impact

Minor bug or occasional failure

Version or commit

main @ 3c1be11

Environment

Windows 11, desktop app, screen reader in browse mode