feat: enforce device-bound connect challenge

ui/package.json

@@ -9,6 +9,7 @@
     "test": "vitest run --config vitest.config.ts"
   },
   "dependencies": {
+    "@noble/ed25519": "3.0.0",
     "dompurify": "^3.3.1",
     "lit": "^3.3.2",
     "marked": "^17.0.1",