chore: update rondevu-client to v0.12.0

- Update to @xtr-dev/rondevu-client v0.10.1
- Replace Rondevu class with RondevuService, ServiceHost, ServiceClient
- Simplify demo implementation (removed complex features)
- Use new event-driven API for connections
- Support custom RTC configuration
- Backup old implementation as App-old.jsx

Breaking changes from v1 API:
- RondevuService for username claiming
- ServiceHost for hosting services with offer pool
- ServiceClient for connecting with auto-reconnection

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package-lock.json

@@ -8,7 +8,7 @@
       "name": "rondevu-demo",
       "version": "2.0.0",
       "dependencies": {
-        "@xtr-dev/rondevu-client": "^0.9.2",
+        "@xtr-dev/rondevu-client": "^0.12.0",
         "@zxing/library": "^0.21.3",
         "qrcode": "^1.5.4",
         "react": "^18.2.0",
@@ -1171,9 +1171,9 @@
       }
     },
     "node_modules/@xtr-dev/rondevu-client": {
-      "version": "0.9.2",
-      "resolved": "https://registry.npmjs.org/@xtr-dev/rondevu-client/-/rondevu-client-0.9.2.tgz",
-      "integrity": "sha512-DVow5AOPU40dqQtlfQK7J2GNX8dz2/4UzltMqublaPZubbkRYgocvp0b76NQu5F6v150IstMV2N49uxAYqogVw==",
+      "version": "0.12.0",
+      "resolved": "https://registry.npmjs.org/@xtr-dev/rondevu-client/-/rondevu-client-0.12.0.tgz",
+      "integrity": "sha512-c1UecF29Cjck7h7b7KWyCti8YSVVkuvEzyAz7aaFwAYBEumgX1r143mTBRfAMQkFL4upkG/PL5bvBGRY9QCpug==",
       "license": "MIT",
       "dependencies": {
         "@noble/ed25519": "^3.0.0"

package.json

@@ -10,7 +10,7 @@
     "deploy": "npm run build && npx wrangler pages deploy dist --project-name=rondevu-demo"
   },
   "dependencies": {
-    "@xtr-dev/rondevu-client": "^0.9.2",
+    "@xtr-dev/rondevu-client": "^0.12.0",
     "@zxing/library": "^0.21.3",
     "qrcode": "^1.5.4",
     "react": "^18.2.0",