Fix conversation handoff and server-side posture for network

- Auto-end conversation on deselection: when bAutoStartConversation is
  true and the player walks out of range, EndConversation() is called
  so the NPC becomes available for other players
- Server-side posture: add ApplyConversationPosture() helper called
  from ServerRequestConversation, ServerReleaseConversation,
  EndConversation (Authority path), and HandleDisconnected — fixes
  NPC not tracking the client on the listen server (OnRep never fires
  on Authority)
- Guard DetachPostureTarget: only clear TargetActor if it matches our
  pawn, preventing the server IC from overwriting posture set by the
  conversation system for a remote client

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_ElevenLabsComponent.cpp

@@ -305,6 +305,7 @@ void UPS_AI_ConvAgent_ElevenLabsComponent::EndConversation()
 
 		// Reset replicated state so other players can talk to this NPC.
 		bNetIsConversing = false;
+		ApplyConversationPosture();
 		NetConversatingPlayer = nullptr;
 		NetConversatingPawn = nullptr;
 	}
@@ -714,6 +715,7 @@ void UPS_AI_ConvAgent_ElevenLabsComponent::HandleDisconnected(int32 StatusCode,
 	if (GetOwnerRole() == ROLE_Authority)
 	{
 		bNetIsConversing = false;
+		ApplyConversationPosture();
 		NetConversatingPlayer = nullptr;
 		NetConversatingPawn = nullptr;
 	}
@@ -1445,6 +1447,9 @@ void UPS_AI_ConvAgent_ElevenLabsComponent::ServerRequestConversation_Implementat
 	NetConversatingPlayer = RequestingPlayer;
 	NetConversatingPawn = RequestingPlayer ? RequestingPlayer->GetPawn() : nullptr;
 
+	// Update NPC posture on the server (OnRep never fires on Authority).
+	ApplyConversationPosture();
+
 	StartConversation_Internal();
 }
 
@@ -1460,7 +1465,10 @@ void UPS_AI_ConvAgent_ElevenLabsComponent::ServerReleaseConversation_Implementat
 		WebSocketProxy = nullptr;
 	}
 
+	// Clear posture before nullifying the pawn pointer (ApplyConversationPosture
+	// uses NetConversatingPawn to guard against clearing someone else's target).
 	bNetIsConversing = false;
+	ApplyConversationPosture();
 	NetConversatingPlayer = nullptr;
 	NetConversatingPawn = nullptr;
 }
@@ -1694,3 +1702,33 @@ UPS_AI_ConvAgent_InteractionComponent* UPS_AI_ConvAgent_ElevenLabsComponent::Fin
 	}
 	return nullptr;
 }
+
+void UPS_AI_ConvAgent_ElevenLabsComponent::ApplyConversationPosture()
+{
+	// Same logic as OnRep_ConversationState's posture section, but callable
+	// from the server side where OnRep never fires (Authority).
+	AActor* Owner = GetOwner();
+	if (!Owner) return;
+
+	auto* Posture = Owner->FindComponentByClass<UPS_AI_ConvAgent_PostureComponent>();
+	if (!Posture) return;
+
+	if (bNetIsConversing && NetConversatingPawn)
+	{
+		Posture->bActive = true;
+		Posture->TargetActor = NetConversatingPawn;
+		Posture->ResetBodyTarget();
+		Posture->bEnableBodyTracking = true;
+	}
+	else
+	{
+		// Only clear if the posture is still pointing at the departing player.
+		// Another InteractionComponent may have already set a new TargetActor.
+		if (!Posture->TargetActor || Posture->TargetActor == NetConversatingPawn)
+		{
+			Posture->bActive = false;
+			Posture->TargetActor = nullptr;
+			Posture->bEnableBodyTracking = false;
+		}
+	}
+}

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_InteractionComponent.cpp

@@ -249,18 +249,31 @@ void UPS_AI_ConvAgent_InteractionComponent::SetSelectedAgent(UPS_AI_ConvAgent_El
 				OldAgent->GetOwner() ? *OldAgent->GetOwner()->GetName() : TEXT("(null)"));
 		}
 
-		// ── Listening: stop ──────────────────────────────────────────────
-		if (bAutoManageListening)
+		// ── Conversation: end if auto-started ────────────────────────────
+		// If we auto-started the conversation on selection, end it now so the
+		// NPC becomes available for other players. EndConversation() also calls
+		// StopListening() internally, so we skip the separate StopListening below.
+		if (bAutoStartConversation && (OldAgent->IsConnected() || OldAgent->bNetIsConversing))
+		{
+			OldAgent->EndConversation();
+		}
+		else if (bAutoManageListening)
 		{
 			OldAgent->StopListening();
 		}
 
-		// Disable body tracking on deselection.
+		// Disable body tracking on deselection — but only if we were the
+		// one who set the TargetActor. The conversation system (OnRep or
+		// server ApplyConversationPosture) may have set TargetActor to a
+		// different player; don't overwrite that.
 		if (bAutoManagePosture)
 		{
 			if (UPS_AI_ConvAgent_PostureComponent* Posture = FindPostureOnAgent(OldAgent))
 			{
-				Posture->bEnableBodyTracking = false;
+				if (Posture->TargetActor == GetOwner())
+				{
+					Posture->bEnableBodyTracking = false;
+				}
 			}
 		}
 
@@ -514,12 +527,18 @@ void UPS_AI_ConvAgent_InteractionComponent::DetachPostureTarget(
 
 	if (UPS_AI_ConvAgent_PostureComponent* Posture = FindPostureOnAgent(AgentPtr))
 	{
-		Posture->TargetActor = nullptr;
-
-		if (bDebug)
+		// Only clear if we are the one who set the TargetActor.
+		// The conversation system (OnRep / ApplyConversationPosture on server)
+		// may have set TargetActor to a different player — don't overwrite that.
+		if (Posture->TargetActor == GetOwner())
 		{
-			UE_LOG(LogPS_AI_ConvAgent_Select, Log, TEXT("Posture detached: %s"),
-				AgentPtr->GetOwner() ? *AgentPtr->GetOwner()->GetName() : TEXT("(null)"));
+			Posture->TargetActor = nullptr;
+
+			if (bDebug)
+			{
+				UE_LOG(LogPS_AI_ConvAgent_Select, Log, TEXT("Posture detached: %s"),
+					AgentPtr->GetOwner() ? *AgentPtr->GetOwner()->GetName() : TEXT("(null)"));
+			}
 		}
 	}
 }

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Public/PS_AI_ConvAgent_ElevenLabsComponent.h

@@ -617,4 +617,9 @@ private:
 	void StartConversation_Internal();
 	/** Find the InteractionComponent on the local player's pawn (for relay RPCs). */
 	class UPS_AI_ConvAgent_InteractionComponent* FindLocalRelayComponent() const;
+
+	/** Update the NPC's PostureComponent from the current conversation state.
+	 *  Called on the server when bNetIsConversing / NetConversatingPawn change,
+	 *  because OnRep_ConversationState never fires on the Authority. */
+	void ApplyConversationPosture();
 };