{"message":"Multi-Tenant NFC Business Card Platform API","version":"2.0.0","database":"MySQL","endpoints":{"auth":"/api/auth (login, register, me)","redirect":"GET /t/:tagId","cards":"/api/cards (protected)","tenants":"/api/tenants","manager":"/api/manager (admin & manager)","upload":"/api/upload (image uploads)","health":"/health","docs":"/api-docs"}}