Added

Enhanced unified window menu for tab operations:
- Added "Copy Tab" menu, supporting copying tabs to:
  - Current window
  - New window
  - Private window
  - Other existing windows (with active tab preview)
- Added "Batch Copy Tabs" feature, supporting the same window options
- Added "Move Tab to Other Window" menu, supporting moving tabs to:
  - New window
  - Private window
  - Other existing windows (with active tab preview)
- Added "Batch Move Tabs to Other Window" feature, supporting the same window options
- Added right-click menu for search result items
Enhanced bookmark functionality:
- Added single tab bookmark option in tab right-click menu
- Added ability to create new bookmark folders directly in bookmark dialog
- Added options to add multiple tabs as subfolders or directly to folders (advanced feature)
- Added ability to bookmark tab groups, using group name as folder name by default (advanced feature)

Improved