AGNURA

Account hub and API for the AGNURA Chrome extension

Phase 1 skeleton: auth API + health check. Chrome extension login and managed AI (`/api/ai-complete`) are wired next per agnura-plugin/docs/own-stack.

GET /api/health
POST /api/auth/register · POST /api/auth/login
POST /api/auth/refresh · GET /api/auth/me
POST /api/ai-complete (stub)