Resolve some Bugs

Unreal/PS_AI_Agent/Config/DefaultEngine.ini

@@ -167,3 +167,6 @@ ConnectionType=USBOnly
 bUseManualIPAddress=False
 ManualIPAddress=
 
+[/Script/PS_AI_ConvAgent.PS_AI_ConvAgent_Settings_ElevenLabs]
+API_Key=7b73c4244ccbec394cc010aaab01b0ec59ce0b11fc636ce4828354f675ca14a5
+

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

@@ -216,6 +216,9 @@ void UPS_AI_ConvAgent_FacialExpressionComponent::OnEmotionChanged(
 	// Begin crossfade
 	CrossfadeAlpha = 0.0f;
 
+	// Notify listeners (Blueprints, other components).
+	OnExpressionChanged.Broadcast(Emotion, Intensity);
+
 	if (bDebug)
 	{
 		UE_LOG(LogPS_AI_ConvAgent_FacialExpr, Log,

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

@@ -416,8 +416,19 @@ void UPS_AI_ConvAgent_InteractionComponent::AttachPostureTarget(
 	if (UPS_AI_ConvAgent_PostureComponent* Posture = FindPostureOnAgent(AgentPtr))
 	{
 		Posture->TargetActor = GetOwner();
-		// Eyes+head only at first — body tracking is enabled when listening starts.
-		Posture->bEnableBodyTracking = false;
+
+		// Reset the body target to the actor's current facing so body tracking
+		// starts fresh on re-entry. Without this, TargetBodyWorldYaw retains
+		// the stale value from the previous interaction and the body never moves
+		// (BodyDelta ≈ 0 because the actor is already at the old target yaw).
+		Posture->ResetBodyTarget();
+
+		// If the agent is already in an active conversation (re-entry),
+		// enable body tracking immediately — the conversation is already engaged,
+		// so HandleAgentResponseStarted won't fire again until the player speaks.
+		// On first interaction the agent isn't connected yet, so we start with
+		// eyes+head only and let HandleAgentResponseStarted enable body later.
+		Posture->bEnableBodyTracking = AgentPtr->IsConnected();
 
 		if (bDebug)
 		{

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

@@ -174,6 +174,14 @@ void UPS_AI_ConvAgent_PostureComponent::OnConversationDisconnected(
 	}
 }
 
+void UPS_AI_ConvAgent_PostureComponent::ResetBodyTarget()
+{
+	if (AActor* Owner = GetOwner())
+	{
+		TargetBodyWorldYaw = Owner->GetActorRotation().Yaw;
+	}
+}
+
 // ─────────────────────────────────────────────────────────────────────────────
 // Map eye angles to 8 ARKit eye curves
 // ─────────────────────────────────────────────────────────────────────────────

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

@@ -11,6 +11,10 @@ class UPS_AI_ConvAgent_ElevenLabsComponent;
 class UPS_AI_ConvAgent_EmotionPoseMap;
 class UAnimSequence;
 
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnExpressionChanged,
+	EPS_AI_ConvAgent_Emotion, Emotion,
+	EPS_AI_ConvAgent_EmotionIntensity, Intensity);
+
 // ─────────────────────────────────────────────────────────────────────────────
 // UPS_AI_ConvAgent_FacialExpressionComponent
 //
@@ -95,6 +99,15 @@ public:
 	UFUNCTION(BlueprintPure, Category = "PS AI ConvAgent|FacialExpression")
 	static bool IsMouthCurve(const FName& CurveName);
 
+	// ── Events ───────────────────────────────────────────────────────────────
+
+	/** Fired when the facial expression changes (emotion + intensity).
+	 *  Subscribe in Blueprints to react to expression changes (trigger animations,
+	 *  particles, sounds, etc.). Only fires when the emotion actually differs
+	 *  from the previous one. */
+	UPROPERTY(BlueprintAssignable, Category = "PS AI ConvAgent|FacialExpression|Events")
+	FOnExpressionChanged OnExpressionChanged;
+
 	// ── UActorComponent overrides ─────────────────────────────────────────────
 	virtual void BeginPlay() override;
 	virtual void EndPlay(const EEndPlayReason::Type EndPlayReason) override;

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

@@ -273,6 +273,11 @@ public:
 	 *  Scaled by activation alpha for smooth passthrough when inactive. */
 	float GetBodyDriftCompensation() const { return BodyDriftCompensation * CurrentActiveAlpha; }
 
+	/** Reset the persistent body yaw target to the actor's current facing.
+	 *  Call this when re-attaching a posture target so body tracking starts
+	 *  fresh instead of chasing a stale yaw from the previous interaction. */
+	void ResetBodyTarget();
+
 	// ── UActorComponent overrides ────────────────────────────────────────────
 	virtual void BeginPlay() override;
 	virtual void EndPlay(const EEndPlayReason::Type EndPlayReason) override;

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgentEditor/Private/PS_AI_ConvAgent_AgentConfigCustomization_ElevenLabs.cpp

@@ -58,6 +58,29 @@ static FString GetLLMLatencyHint(const FString& ModelID)
 	return FString();
 }
 
+// Language code → display name. Shared by BuildAgentPayload (to resolve
+// {Language} placeholder) and the fetch handler (to strip the resolved fragment).
+static FString GetLanguageDisplayName(const FString& LangCode)
+{
+	static const TMap<FString, FString> LangNames = {
+		{TEXT("fr"), TEXT("French")},   {TEXT("de"), TEXT("German")},
+		{TEXT("es"), TEXT("Spanish")},   {TEXT("it"), TEXT("Italian")},
+		{TEXT("pt"), TEXT("Portuguese")}, {TEXT("ja"), TEXT("Japanese")},
+		{TEXT("ko"), TEXT("Korean")},    {TEXT("zh"), TEXT("Chinese")},
+		{TEXT("nl"), TEXT("Dutch")},     {TEXT("pl"), TEXT("Polish")},
+		{TEXT("ru"), TEXT("Russian")},   {TEXT("sv"), TEXT("Swedish")},
+		{TEXT("tr"), TEXT("Turkish")},   {TEXT("hi"), TEXT("Hindi")},
+		{TEXT("cs"), TEXT("Czech")},     {TEXT("ar"), TEXT("Arabic")},
+		{TEXT("id"), TEXT("Indonesian")}, {TEXT("fi"), TEXT("Finnish")},
+		{TEXT("da"), TEXT("Danish")},    {TEXT("el"), TEXT("Greek")},
+		{TEXT("hu"), TEXT("Hungarian")}, {TEXT("no"), TEXT("Norwegian")},
+		{TEXT("ro"), TEXT("Romanian")},  {TEXT("uk"), TEXT("Ukrainian")},
+		{TEXT("vi"), TEXT("Vietnamese")},
+	};
+	const FString* Found = LangNames.Find(LangCode);
+	return Found ? *Found : LangCode;
+}
+
 // ─────────────────────────────────────────────────────────────────────────────
 // Factory
 // ─────────────────────────────────────────────────────────────────────────────
@@ -309,7 +332,6 @@ void FPS_AI_ConvAgent_AgentConfigCustomization_ElevenLabs::CustomizeDetails(
 			.Font(IDetailLayoutBuilder::GetDetailFont())
 		]
 		.ValueContent()
-		.MaxDesiredWidth(600.f)
 		[
 			SNew(SBox)
 			.MinDesiredHeight(200.f)
@@ -1091,13 +1113,65 @@ void FPS_AI_ConvAgent_AgentConfigCustomization_ElevenLabs::OnFetchAgentClicked()
 							// to avoid doubling them on next Update.
 							// Order matters: strip from earliest marker to preserve CharacterPrompt.
 
-							// 1. Language instruction marker
+							// 1. Language instruction — try exact fragment first, then marker fallback.
+							// Mirrors the emotion-tool approach: ElevenLabs may normalise
+							// double-newlines, so the "\n\n## …" marker alone can fail.
 							{
-								const FString LangMarker = TEXT("\n\n## Language");
-								int32 Idx = Prompt.Find(LangMarker, ESearchCase::CaseSensitive);
-								if (Idx != INDEX_NONE)
+								bool bLangStripped = false;
+
+								// (a) Exact multilingual fragment match
+								if (!bLangStripped && !Asset->MultilingualPromptFragment.IsEmpty())
 								{
-									Prompt.LeftInline(Idx);
+									int32 Idx = Prompt.Find(Asset->MultilingualPromptFragment,
+										ESearchCase::CaseSensitive);
+									if (Idx != INDEX_NONE)
+									{
+										Prompt.LeftInline(Idx);
+										bLangStripped = true;
+									}
+								}
+
+								// (b) Exact fixed-language fragment match (resolve {Language} placeholder)
+								if (!bLangStripped && !Asset->LanguagePromptFragment.IsEmpty())
+								{
+									// Extract language from JSON so we can resolve the placeholder.
+									FString FetchedLang;
+									(*AgentObj)->TryGetStringField(TEXT("language"), FetchedLang);
+									if (!FetchedLang.IsEmpty())
+									{
+										FString Resolved = Asset->LanguagePromptFragment;
+										Resolved.ReplaceInline(TEXT("{Language}"),
+											*GetLanguageDisplayName(FetchedLang));
+										int32 Idx = Prompt.Find(Resolved, ESearchCase::CaseSensitive);
+										if (Idx != INDEX_NONE)
+										{
+											Prompt.LeftInline(Idx);
+											bLangStripped = true;
+										}
+									}
+								}
+
+								// (c) Marker fallback — double newline
+								if (!bLangStripped)
+								{
+									const FString LangMarker = TEXT("\n\n## Language");
+									int32 Idx = Prompt.Find(LangMarker, ESearchCase::CaseSensitive);
+									if (Idx != INDEX_NONE)
+									{
+										Prompt.LeftInline(Idx);
+										bLangStripped = true;
+									}
+								}
+
+								// (d) Marker fallback — single newline (ElevenLabs may collapse \n\n)
+								if (!bLangStripped)
+								{
+									const FString LangMarkerAlt = TEXT("\n## Language");
+									int32 Idx = Prompt.Find(LangMarkerAlt, ESearchCase::CaseSensitive);
+									if (Idx != INDEX_NONE)
+									{
+										Prompt.LeftInline(Idx);
+									}
 								}
 							}
 
@@ -1394,24 +1468,7 @@ TSharedPtr<FJsonObject> FPS_AI_ConvAgent_AgentConfigCustomization_ElevenLabs::Bu
 	{
 		// Fixed-language mode: force the LLM to always respond in one language.
 		// Replace {Language} placeholder with the actual language display name.
-		static const TMap<FString, FString> LangNames = {
-			{TEXT("fr"), TEXT("French")},   {TEXT("de"), TEXT("German")},
-			{TEXT("es"), TEXT("Spanish")},   {TEXT("it"), TEXT("Italian")},
-			{TEXT("pt"), TEXT("Portuguese")}, {TEXT("ja"), TEXT("Japanese")},
-			{TEXT("ko"), TEXT("Korean")},    {TEXT("zh"), TEXT("Chinese")},
-			{TEXT("nl"), TEXT("Dutch")},     {TEXT("pl"), TEXT("Polish")},
-			{TEXT("ru"), TEXT("Russian")},   {TEXT("sv"), TEXT("Swedish")},
-			{TEXT("tr"), TEXT("Turkish")},   {TEXT("hi"), TEXT("Hindi")},
-			{TEXT("cs"), TEXT("Czech")},     {TEXT("ar"), TEXT("Arabic")},
-			{TEXT("id"), TEXT("Indonesian")}, {TEXT("fi"), TEXT("Finnish")},
-			{TEXT("da"), TEXT("Danish")},    {TEXT("el"), TEXT("Greek")},
-			{TEXT("hu"), TEXT("Hungarian")}, {TEXT("no"), TEXT("Norwegian")},
-			{TEXT("ro"), TEXT("Romanian")},  {TEXT("uk"), TEXT("Ukrainian")},
-			{TEXT("vi"), TEXT("Vietnamese")},
-		};
-
-		const FString* LangName = LangNames.Find(Asset->Language);
-		const FString DisplayLang = LangName ? *LangName : Asset->Language;
+		const FString DisplayLang = GetLanguageDisplayName(Asset->Language);
 		FString LangFragment = Asset->LanguagePromptFragment;
 		LangFragment.ReplaceInline(TEXT("{Language}"), *DisplayLang);
 		FullPrompt += TEXT("\n\n");