Make Swift Shift only modify one window when size/move is in use

Bug description

If I'm resizing a window, and my cursor moves to a different window while still performing the resize interaction, the second window will take the move/resize gestures from the interaction.

I would expect all resize/move gestures to be performed on the first window I interacted with until I release all keys - even if that meant rejecting resize/move gestures that would be invalid for that window. Currently, it is possible to accidentally slip these gestures through to a lower window revealed by resizing.

Setup

I have CTRL set to move a window; CTRL+OPTION set to resize.

This means I can begin moving a window by tapping control, then additionally pressing option in the same interaction to resize a window (releasing it to go back to moving the window).

I have launch-at-login ON, but focus-on-window, use-quadrants, and snap-to-nearby-window all set to OFF.

macOS version

Tahoe 26.6.2

Settings

• [✓] Launch at login
• [ ✓] Show menubar icon
• [ ] Focus on window
• [ ] Use quadrants
• [ ] Snap to nearby window

Shortcuts

• Move:
  Keyboard: CTRL
  Mouse: none

• Resize:
  Keyboard: CTRL+OPTION
  Mouse: none

No source files or tests are named. Start by tracing the move/resize interaction handling and reproduce the issue with CTRL for move and CTRL+OPTION for resize while crossing onto another window; done means all gestures in one interaction remain tied to the first window until the keys are released.