fix(ui): prevent disabled hotkeys from blocking shared keys

[DustyShoe]

Summary

Follow-up to #9482.

The Canvas eyedropper and Viewer metadata panel both use I. Disabled hotkeys were wrapped in an enabled callback, causing react-hotkeys-hook to keep their listeners registered. A disabled listener could then block the active handler for the same key.

This keeps enabled: false static so disabled hotkeys are not registered, while preserving the Canvas Text session guard and custom predicates.

Expected behavior

Clicking a gallery thumbnail moves focus to Gallery, so I does not toggle Viewer metadata until Viewer regains focus.
Navigating between images with the arrow keys keeps focus in Viewer, so I continues to toggle metadata.

Related Issues / Discussions

Re-Closes #9467

QA Instructions

• Open Canvas and confirm I selects the eyedropper.
• Open Viewer with Z and confirm I toggles metadata.

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• ❗Changes to a redux slice have a corresponding migration
• Documentation added / updated (if applicable)
• Updated What's New copy (if doing a release after this PR)