- Add evershelf-scale-gateway/ Android app (Kotlin):
- BLE scanning and GATT connection to smart scales
- Supports BT SIG Weight Scale (0x181D), Body Composition (0x181B), and generic heuristic parser
- WebSocket server on port 8765 (local LAN)
- Real-time weight broadcasting to EverShelf browser client
- Add scale status indicator in header (green/orange/grey dot)
- Add Settings tab for scale configuration (URL, enable toggle, test, APK download link)
- Add 'Read from scale' button in Add/Use forms when unit is g or ml
- Add scale WebSocket client logic in app.js with auto-reconnect
- Fix recipe suggestion: expiry-prioritized ingredients now only injected into
AI prompt when user explicitly selects 'Priorità Scadenze' or 'Zero Sprechi'
- Update README with smart scale section and website link
- Update all translations (it, en, de) with scale strings