- api/scale_discover.php: async TCP scan of whole /24 subnet on port 8765,
confirms with WebSocket handshake, returns found ws:// URLs in ~1.5s
- index.html: '🔍 Auto' button next to gateway URL field
- app.js: discoverScaleGateway() — calls relay, fills URL field and
auto-saves settings + reconnects on success
dadaloop82