Simplify TURN server configuration

- Remove duplicate TURN entries to avoid "5+ servers" warning
- Keep only essential STUN and TURN servers
- Use standard ports (80 and 443)

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

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

src/App.jsx

@@ -14,21 +14,11 @@ const RTC_CONFIG = {
       username: "e03a51621b4f11ffbed3addd",
       credential: "QPjJzPau1Ng5S0dq",
     },
-    {
-      urls: "turn:standard.relay.metered.ca:80?transport=tcp",
-      username: "e03a51621b4f11ffbed3addd",
-      credential: "QPjJzPau1Ng5S0dq",
-    },
     {
       urls: "turn:standard.relay.metered.ca:443",
       username: "e03a51621b4f11ffbed3addd",
       credential: "QPjJzPau1Ng5S0dq",
     },
-    {
-      urls: "turns:standard.relay.metered.ca:443?transport=tcp",
-      username: "e03a51621b4f11ffbed3addd",
-      credential: "QPjJzPau1Ng5S0dq",
-    },
   ]
 };