feat: add authenticated durable native Hope chat

Sources/LiveKit/VoiceSession.swift

@@ -112,6 +112,12 @@ final class VoiceSession: ObservableObject {
         NotificationCenter.default.removeObserver(self)
     }
 
+    /// Explicit chat-to-Talk navigation tears down the prior room first.
+    func bindConversation(_ id: String?) async {
+        await disconnect()
+        tokenClient.conversationID = id
+    }
+
     private func handleControlEvent(_ event: ControlChannel.InboundEvent) {
         // Restrict inbound control-event application to active lifecycle states
         // so late events from a failed/tearing-down room cannot repopulate stale