fix(hooks): stabilize useKeyboardShortcuts keydown listener

[Nacho1499]

Closes #897

PR Description:
Prevent the global document keydown event listener in useKeyboardShortcuts from tearing down and re-registering on every single render.
Previously, because commandMap depended directly on the commands prop, passing inline command arrays caused the map and handler references to change identity on every render. This forced useEffect to constantly remove and re-add the document event listener.
This update introduces a stable useRef approach to hold the active commands and shortcuts, ensuring the keydown listener is attached once while always reading the freshest closures.

Type of Change:
[x] Bug fix

Checklist:
[x] Code follows project style guidelines
[x] Self-review completed
[x] No console errors

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