- Change opacity from 0.4 to 0 when no selection (fully transparent)
- Remove shadow when transparent for cleaner look
- Use pointerEvents: none to prevent interaction when invisible
- Remove disabled attribute, handle interaction via pointer events
- Button smoothly fades in/scales up when text is selected
- Replace floating popup button with persistent FAB in bottom-right corner
- Button always visible but disabled when no text is selected
- Uses user's highlight color from settings
- Visual feedback: scales up and becomes opaque when text is selected
- Follows Google apps design pattern for floating action buttons
- Create HighlightButton component that appears on text selection
- Add highlightCreationService using EventFactory and HighlightBlueprint
- Integrate highlight button into ContentPanel with text selection detection
- Update Bookmarks to pass required props and refresh highlights after creation
- Publish highlights to NIP-84 relays automatically
- Only show button when user is logged in
