Authentication:
  POST /api/auth/register - Register new user
  POST /api/auth/login - Login user
  POST /api/auth/logout - Logout user
  GET  /api/auth/verify - Verify token

Users:
  GET  /api/users/me - Get current user
  POST /api/users/me - Update profile
  POST /api/users/me/password - Change password
  POST /api/users/me/password/reset - Request password reset
  POST /api/users/me/password/confirm - Confirm password reset

Groups:
  GET  /api/groups - List user groups
  POST /api/groups - Create group
  GET  /api/groups/:id - Get group details
  POST /api/groups/:id - Update/delete group
  POST /api/groups/:id/model - Update default AI model
  GET  /api/groups/:id/llm/models - List available AI models

Members:
  GET  /api/groups/:id/members - List members
  POST /api/groups/:id/members - Add member
  POST /api/groups/:id/members/action - Update role/remove member
  POST /api/groups/:id/leave - Leave group

Messages:
  GET  /api/groups/:id/messages - Get messages
  POST /api/groups/:id/messages - Send message
  POST /api/messages/:id - Edit/delete message

Invites:
  GET  /api/invites/:code - Get invite details
  POST /api/invites/:code/join - Join via invite
  POST /api/invites/:code - Revoke invite
  GET  /api/groups/:id/invites - List group invites
  POST /api/groups/:id/invites - Create invite

Graph:
  GET  /api/groups/:id/graph/nodes - List nodes
  POST /api/groups/:id/graph/nodes - Create node
  GET  /api/groups/:id/graph/nodes/:nodeId - Get node
  PUT  /api/groups/:id/graph/nodes/:nodeId - Update node
  DELETE /api/groups/:id/graph/nodes/:nodeId - Delete node
  GET  /api/groups/:id/graph/search - Search nodes
  POST /api/groups/:id/graph/edges - Create edge
  DELETE /api/groups/:id/graph/edges - Delete edge

System:
  GET /health - Health check