Cards/Grid:
- Add min-width:0 to .device-grid to prevent grid overflow
- Add max-width:100%, overflow:hidden, word-break:break-word to .device-card
- Add min-width:0 and overflow-wrap to .device-card__body
- Bump config.css cache-bust to v=2
Onboarding:
- Add GET/POST /pos/api/config/onboarding-status endpoints in config_bp.py
- onboarding.js now checks server first before showing wizard
- On finish, POSTs completion to server (tenant_config table)
- Falls back to localStorage for fast path and offline resilience
- Bump onboarding.js cache-bust to v=2 in catalog.html