v1.1.0 - Real-time Chat, Admin Controls & Profile Editing

🚀 What's New

💬 Real-Time DM Chat

• New interactive chat mode: kb chat <username>
• Real-time message delivery via WebSocket with ed25519 signatures
• See online/offline status of the other user
• Type /exit or Ctrl+C to quit

🛠️ Admin Controls

• kb admin users — List all users with stats
• kb admin user <id> — View detailed user info
• kb admin delete-user <username> — Permanently delete a user account
• kb admin grant <username> — Grant admin privileges
• kb admin revoke <username> — Revoke admin privileges

🛡️ Admin API

• GET /api/admin/users — List all users
• GET /api/admin/users/:id — Get user details (with keys, DMs)
• DELETE /api/admin/users/:id — Delete a user (cascade)
• PUT /api/admin/users/:id/admin — Toggle admin status

✏️ Profile Editing

• kb edit-profile --display-name="..." --bio="..." --avatar-url="..."

🔒 Security

• New requireAdmin middleware
• ADMIN_USERNAME env var for bootstrapping the first admin
• Admin self-deletion and self-revocation protection

📖 Documentation

• README, docs landing page, and full docs updated with all new features
• API reference includes admin endpoints