QuickMarks

 - Fixed custom button edit dialog conflicts: Completely rewrote the custom button edit dialog to use a standalone frame instead of the StaticPopup system, preventing conflicts with Blizzard UI dialogs (instance reset, death release, arena/BG queues, item deletion confirmations, etc.)
  - Added item link support: Custom button messages now support Shift+clicking items to insert item links directly into the message field
  - Improved dialog visibility: Custom button edit dialog now appears with a solid black
  background and proper frame strata to display clearly above the options panel

  Changes

  - Custom button edit dialog is now movable by dragging
  - Dialog no longer blocks character movement when open
  - Dialog can be closed with Escape key or Cancel button
  - Added combat lockout for editing custom buttons (prevents taint issues)
  - Item link insertion includes protection against interfering with Blizzard deletion
  confirmations

  Technical

  - Removed preferredIndex from custom button dialog to prevent StaticPopup slot conflicts
  - Implemented HandleModifiedItemClick hook with dialog state checking for item link insertion
  - Dialog uses FULLSCREEN_DIALOG strata to ensure visibility above options panel