Enhancement: Follow from Lanyard - Add Bluesky follow/unfollow button

[renderghost]

Description

Add interactive follow/unfollow button to public profiles that integrates with Bluesky's follow system.

Features

• For signed-in users:
  • Shows current follow state ("Following" / "Follow")
  • Allows follow/unfollow directly from Lanyard
  • Updates state in real-time
  • Uses authenticated Bluesky session
• For visitors (not signed in):
  • Shows generic "Follow" button
  • Opens Bluesky profile in new tab on click

Implementation

1. Check if viewer is authenticated with Bluesky
2. If authenticated:
   • Fetch current follow state via AT Protocol
   • Show toggle button with current state
   • Handle follow/unfollow actions via app.bsky.graph.follow
   • Update UI optimistically
3. If not authenticated:
   • Show simple "Follow" link
   • Link to https://bsky.app/profile/{handle}

Benefits

• Increases engagement between researchers
• Reduces friction for following interesting profiles
• Keeps users within Lanyards ecosystem
• Leverages existing Bluesky network

Design Notes

• Position near profile header or action buttons
• Clear visual distinction between states
• Loading state during follow/unfollow action