Enhance test coverage and refactor code in various modules

- Achieved 85% overall test coverage with detailed results for individual components.
- Added unit tests for DragInterceptor and MainWindow components.
- Refactored imports and removed unused code in multiple files.
- Updated test configurations and ensured compliance with coverage standards.

src/webdrop_bridge/ui/restricted_web_view.py

@@ -2,7 +2,6 @@
 
 import fnmatch
 from typing import List, Optional
-from urllib.parse import urlparse
 
 from PySide6.QtCore import QUrl
 from PySide6.QtGui import QDesktopServices