[Bug]: editor shortcuts still reach the timeline while the Export modal is open

[EtienneLescot]

Describe the bug

Editor shortcuts still reach the timeline while the Export modal is open. With the modal up, pressing Z, T and C created three regions in the project behind it:

Key	Region created
T	trim — 0:01.9
Z	zoom — 1.80×
C	Full Camera segment

This is what 65aa74ef ("stop editor shortcuts reaching the timeline under a modal") is meant to prevent.

The guard exists and works — it just is not applied to this modal

The Keyboard Shortcuts modal blocks correctly. Tested on a fresh playhead position, because a first attempt was confounded by a zoom region already sitting where the playhead was:

State	Press Z at an unused playhead position	Result
Keyboard Shortcuts modal open	yes	no region created
Same modal closed	yes	region created immediately

So the blocking path and the focus restoration on close both behave. The Export modal is simply not wired into the same guard.

Why it is worth fixing before release

It compounds with #433 (undo/redo are inert): a user who brushes Z, T or C while configuring an export gets stray regions in their timeline and cannot undo them.

Expected behavior

While any modal is open, editor shortcuts do not mutate the timeline.

To Reproduce

1. Record anything and let the editor open.
2. Click Export to open the export modal.
3. Press Z, then T, then C.
4. Close the modal — three new regions are on the timeline at the playhead.

Environment

• OS: Windows 11 (26200)
• Build: packaged Openscreen.exe 1.9.6, built from main @ 95e350e0 via npm run build:win

Found during a computer-use pass over technical-documentation/testing/manual-e2e-checklist.md.

[github-actions]

Fixed by #437 and merged into main.

This change is assigned to the v1.10.0 release milestone and is not necessarily available in the latest downloadable desktop release yet. It is currently marked as status: pending release until a packaged release containing it is published.