Fix signature validation issues in demo

- Add comprehensive logging for init and publish flows
- Verify username is claimed before publishing service
- Detect keypair mismatches and provide clear error messages
- Handle authentication errors more gracefully
- Auto-claim username if not claimed during publish
- Improved user guidance for common errors

CLAUDE.md

@@ -6,12 +6,37 @@
 
 When configuring TURN servers:
 
-- ✅ **DO** include the port number in TURN URLs: `turn:server.com:3478`
+- ✅ **DO** use TURNS (secure) on port 5349 when available: `turns:server.com:5349`
+- ✅ **DO** include TURN fallback on port 3478: `turn:server.com:3478`
+- ✅ **DO** include the port number in TURN URLs (even if default)
 - ✅ **DO** test TURN connectivity before deploying: `turnutils_uclient -u user -w pass server.com 3478 -y`
 - ✅ **DO** provide both TCP and UDP transports for maximum compatibility
-- ❌ **DON'T** omit the port number (even if it's the default 3478)
+- ❌ **DON'T** omit the port number
 - ❌ **DON'T** assume TURN works without testing
 
+**Current Configuration:**
+```javascript
+const RTC_CONFIG = {
+  iceServers: [
+    { urls: ["stun:stun.share.fish:3478"] },
+    {
+      urls: [
+        // TURNS (secure) - TLS/DTLS on port 5349 (preferred)
+        "turns:turn.share.fish:5349?transport=tcp",
+        "turns:turn.share.fish:5349?transport=udp",
+        // TURN (fallback) - plain on port 3478
+        "turn:turn.share.fish:3478?transport=tcp",
+        "turn:turn.share.fish:3478?transport=udp",
+      ],
+      username: "webrtcuser",
+      credential: "supersecretpassword"
+    }
+  ]
+};
+```
+
+WebRTC will try TURNS (secure) endpoints first, falling back to plain TURN if needed.
+
 ### ICE Configuration
 
 **Force Relay Mode for Testing:**

package-lock.json

@@ -8,7 +8,7 @@
       "name": "rondevu-demo",
       "version": "2.0.0",
       "dependencies": {
-        "@xtr-dev/rondevu-client": "^0.8.3",
+        "@xtr-dev/rondevu-client": "file:../client",
         "@zxing/library": "^0.21.3",
         "qrcode": "^1.5.4",
         "react": "^18.2.0",
@@ -22,6 +22,27 @@
         "vite": "^5.4.11"
       }
     },
+    "../client": {
+      "name": "@xtr-dev/rondevu-client",
+      "version": "0.13.0",
+      "license": "MIT",
+      "dependencies": {
+        "@noble/ed25519": "^3.0.0"
+      },
+      "devDependencies": {
+        "@eslint/js": "^9.39.1",
+        "@typescript-eslint/eslint-plugin": "^8.48.1",
+        "@typescript-eslint/parser": "^8.48.1",
+        "eslint": "^9.39.1",
+        "eslint-config-prettier": "^10.1.8",
+        "eslint-plugin-prettier": "^5.5.4",
+        "eslint-plugin-unicorn": "^62.0.0",
+        "globals": "^16.5.0",
+        "prettier": "^3.7.4",
+        "typescript": "^5.9.3",
+        "vite": "^7.2.6"
+      }
+    },
     "node_modules/@babel/code-frame": {
       "version": "7.27.1",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.27.1.tgz",
@@ -745,15 +766,6 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
-    "node_modules/@noble/ed25519": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/@noble/ed25519/-/ed25519-3.0.0.tgz",
-      "integrity": "sha512-QyteqMNm0GLqfa5SoYbSC3+Pvykwpn95Zgth4MFVSMKBB75ELl9tX1LAVsN4c3HXOrakHsF2gL4zWDAYCcsnzg==",
-      "license": "MIT",
-      "funding": {
-        "url": "https://paulmillr.com/funding/"
-      }
-    },
     "node_modules/@rolldown/pluginutils": {
       "version": "1.0.0-beta.27",
       "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-beta.27.tgz",
@@ -1171,13 +1183,8 @@
       }
     },
     "node_modules/@xtr-dev/rondevu-client": {
-      "version": "0.8.3",
-      "resolved": "https://registry.npmjs.org/@xtr-dev/rondevu-client/-/rondevu-client-0.8.3.tgz",
-      "integrity": "sha512-yvTZYQiOeIuaQgTZPhO3Wud9OEi7Mwxt9b4JYWlhwaReVUNajI1fpWTO8hHu8BrkiowVDabDN0qLFpwRufEvsw==",
-      "license": "MIT",
-      "dependencies": {
-        "@noble/ed25519": "^3.0.0"
-      }
+      "resolved": "../client",
+      "link": true
     },
     "node_modules/@zxing/library": {
       "version": "0.21.3",

package.json

@@ -10,7 +10,7 @@
     "deploy": "npm run build && npx wrangler pages deploy dist --project-name=rondevu-demo"
   },
   "dependencies": {
-    "@xtr-dev/rondevu-client": "^0.8.3",
+    "@xtr-dev/rondevu-client": "file:../client",
     "@zxing/library": "^0.21.3",
     "qrcode": "^1.5.4",
     "react": "^18.2.0",