WEB-004: Connection status from user_devices table

Track: 1 — MVP
Section: 1.52 Smart Ring Page
Status: [ ] Todo
Repo: champion-stats-hub
Branch: feature/WEB-004-ring-connection-status

Done When

/smart-ring shows: "Connected" / "Disconnected", battery %, last sync time. Real-time Supabase subscription updates status

Notes

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