Fix note-popup UI issues

[kookyleo]

Summary

• Fix note-popup cursor style (remove draggable cursor)
• Add click-outside-to-close functionality for note-popup
• Ensure popup closes when edit button is clicked

Changes

1. Remove draggable cursor: Changed cursor: move to cursor: default in .note-popup CSS
2. Click outside to close: Added event listener to close popup when clicking outside the popup or highlight element
3. Close on edit: Popup now closes properly when the edit button is clicked, allowing the modal to receive focus correctly

Test plan

• Verify cursor shows default style when hovering over note-popup
• Click outside the popup to verify it closes
• Click edit button to verify popup closes and input receives focus
• Build passes successfully