- Create deletionService for NIP-09 kind:5 event deletion requests
- Add ConfirmDialog component for user confirmation before deletion
- Add subtle delete button to highlight items (trash icon)
- Only show delete button for user's own highlights
- Position delete button symmetrically opposite to relay indicator
- Add confirmation dialog to prevent accidental deletions
- Remove highlights from UI immediately after deletion request
- Style delete button with red hover color
- Add comprehensive confirmation dialog styling (danger/warning/info variants)
Implements NIP-09 Event Deletion Request.
Users can now delete their own highlights after confirming the action.
