{"name":"BlitzerPro API","version":"3.0.0","features":["Extended User Management","User Favorites","Check-in History","Offline-First Registration","Chat Room System (hotspot, direct, group)","WebSocket Rooms + Typing Indicator","User Blocking","FCM Push (vorbereitet)"],"endpoints":{"health":"/health","users":"/api/users/*","hotspots":"/api/hotspots/*","chat":"/api/chat/*"}}