Add Floating Modal Search

[balamurugan15]

Added

• New Floating Modal display mode for Link Map
• Floating modal is now the default open mode
• New display mode setting to choose between:
  • Chrome Sidebar
  • Floating Modal
  • Popup Window

Improved

• Floating modal opens centered on screen with a wide search bar
• Search input is focused automatically when the modal opens
• Pressing Esc closes the modal
• Clicking outside the modal closes it
• If the modal loses focus, it closes automatically
• Pressing the Link Map activation shortcut again closes the modal if it is already open

Keyboard Navigation

• ArrowUp / ArrowDown now navigate highlighted items directly from the search field
• With no search query, navigation starts from the current active browser tab
• With a search query, navigation cycles through only the filtered visible results
• Enter now opens/focuses the highlighted tab or window and closes the modal
• In modal mode, clicking a tab behaves like a direct open/focus action without requiring double-click

UI Updates

• Increased default UI font size for better readability
• Improved floating modal sizing so it fits properly within the popup window
• Simplified the header layout so the search bar uses the full width
• Moved Settings out of the header into the operation bar next to the options control

Internal

• Added safer handling for extension window/tab resolution when creating popup/modal windows
• Improved extension page detection for tree.html URLs with query parameters