fix: close block context menu when a keyboard command runs

[SmrutiSawant]

Problem

Select a block, right-click to open the context menu, then press ?.
The Keyboard Shortcuts modal opens but the context menu stays on
screen, floating on top of the modal.

before.mp4

Fix

commandShortcuts() now wraps each command's action to dismiss the
block context menu before running it

now.mp4

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge with no actionable defects identified.

The wrapper preserves the commands’ zero-argument void contract, and context-menu dismissal only changes menu visibility before executing each action.

_{Reviews (1): Last reviewed commit: "fix: close block context menu when a key..." | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.06%. Comparing base (12c787a) to head (47c769e).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #795   +/-   ##
========================================
  Coverage    66.06%   66.06%           
========================================
  Files           93       93           
  Lines        10386    10386           
========================================
  Hits          6862     6862           
  Misses        3524     3524           

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