Add MVP frontend audio hooks

AGRARIAN_DEVELOPMENT_ROADMAP.md

@@ -847,7 +847,7 @@ Target deliverable: A small group can join a server, spawn into one biome, gathe
 - [x] Add QA coverage for safe campfires, unsafe campfires, vegetation spread, shelter ignition, suppression, and save/load recovery. Added a fire-risk QA coverage document and verifier requiring safe/unsafe campfire, vegetation spread, shelter ignition, suppression, and save/load recovery scenarios plus the supporting fire-risk verification scripts.
 - [x] Add weather sounds. Formalized the existing placed weather audio controller as the MVP weather-sound path, documenting rain, wind, storm, clear ambient, and biome loop slots plus verification that weather playback follows replicated weather state, provider wind speed, and day/night state while remaining silent until assets are assigned.
 - [x] Add wildlife sounds. Added spatialized wildlife audio hooks with assignable idle, flee/chase, death, and harvest sound slots plus server-triggered multicast playback from authoritative wildlife state changes and harvest events.
-- [ ] Add UI sounds.
+- [x] Add UI sounds. Added optional 2D confirm, back, selection, and save/quit sound hooks to the MVP frontend widget, with keyboard and mouse actions sharing the same feedback path while remaining silent until UI audio assets are assigned.
 - [ ] Add mix settings.
 - [ ] Add volume sliders.
 

Docs/TechnicalDesignDocument.md

@@ -323,6 +323,11 @@ Wildlife expose idle, flee/chase, death, and harvest sound slots. The server
 multicasts state-change and harvest cues so clients hear wildlife reactions from
 the authoritative AI state while the dedicated server remains silent.
 
+UI sounds are optional 2D hooks on `UAgrarianMvpFrontendWidget`. The frontend
+exposes confirm, back, selection, and save/quit sound slots. Keyboard and mouse
+actions play the same cues so menu feedback stays consistent across input
+methods while the widget remains silent until UI assets are assigned.
+
 Player movement audio starts with native footstep placeholders on
 `AAgrarianGameCharacter`. The character owns a spatialized
 `FootstepAudioComponent` plus assignable walk, sprint, crouch, and prone sound

Scripts/verify_ui_sounds.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+"""Verify MVP frontend UI sound hooks are present."""
+
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+UI_H = ROOT / "Source" / "AgrarianGame" / "AgrarianMvpFrontendWidget.h"
+UI_CPP = ROOT / "Source" / "AgrarianGame" / "AgrarianMvpFrontendWidget.cpp"
+TDD = ROOT / "Docs" / "TechnicalDesignDocument.md"
+ROADMAP = ROOT / "AGRARIAN_DEVELOPMENT_ROADMAP.md"
+
+REQUIRED = {
+    UI_H: [
+        "TObjectPtr<USoundBase> UiConfirmSound;",
+        "TObjectPtr<USoundBase> UiBackSound;",
+        "TObjectPtr<USoundBase> UiSelectionSound;",
+        "TObjectPtr<USoundBase> UiSaveQuitSound;",
+        "void PlayUiSound(USoundBase* Sound) const;",
+    ],
+    UI_CPP: [
+        "#include \"Kismet/GameplayStatics.h\"",
+        "UGameplayStatics::PlaySound2D(this, Sound);",
+        "PlayUiSound(UiConfirmSound);",
+        "PlayUiSound(UiBackSound);",
+        "PlayUiSound(UiSelectionSound);",
+        "PlayUiSound(UiSaveQuitSound);",
+        "HandlePrimaryActionClicked",
+        "HandleBackClicked",
+        "HandleMaleCharacterClicked",
+        "NativeOnKeyDown",
+    ],
+    TDD: [
+        "UI sounds are optional 2D hooks",
+        "confirm, back, selection, and save/quit sound",
+        "Keyboard and mouse",
+    ],
+    ROADMAP: [
+        "[x] Add UI sounds.",
+    ],
+}
+
+
+def main() -> None:
+    missing = []
+    for path, snippets in REQUIRED.items():
+        text = path.read_text(encoding="utf-8")
+        for snippet in snippets:
+            if snippet not in text:
+                missing.append(f"{path.relative_to(ROOT)} missing {snippet!r}")
+    if missing:
+        raise SystemExit("FAILED: " + "; ".join(missing))
+    print("OK: UI sound hooks are shared across keyboard and mouse actions.")
+
+
+if __name__ == "__main__":
+    main()

Source/AgrarianGame/AgrarianMvpFrontendWidget.cpp

@@ -14,6 +14,7 @@
 #include "Components/VerticalBoxSlot.h"
 #include "GameFramework/PlayerController.h"
 #include "InputCoreTypes.h"
+#include "Kismet/GameplayStatics.h"
 #include "Styling/CoreStyle.h"
 #include "TimerManager.h"
 
@@ -48,18 +49,21 @@ FReply UAgrarianMvpFrontendWidget::NativeOnKeyDown(const FGeometry& InGeometry,
 		const FKey Key = InKeyEvent.GetKey();
 		if (Key == EKeys::Left || Key == EKeys::A)
 		{
+			PlayUiSound(UiSelectionSound);
 			SetSelectedCharacterArchetype(EAgrarianMvpCharacterArchetype::YoungAdultMale);
 			return FReply::Handled();
 		}
 
 		if (Key == EKeys::Right || Key == EKeys::D)
 		{
+			PlayUiSound(UiSelectionSound);
 			SetSelectedCharacterArchetype(EAgrarianMvpCharacterArchetype::YoungAdultFemale);
 			return FReply::Handled();
 		}
 
 		if (Key == EKeys::Enter || Key == EKeys::SpaceBar)
 		{
+			PlayUiSound(UiConfirmSound);
 			ConfirmActiveScreen();
 			return FReply::Handled();
 		}
@@ -69,12 +73,14 @@ FReply UAgrarianMvpFrontendWidget::NativeOnKeyDown(const FGeometry& InGeometry,
 		const FKey Key = InKeyEvent.GetKey();
 		if (Key == EKeys::Enter || Key == EKeys::SpaceBar)
 		{
+			PlayUiSound(UiConfirmSound);
 			ConfirmActiveScreen();
 			return FReply::Handled();
 		}
 
 		if (Key == EKeys::BackSpace || Key == EKeys::Escape)
 		{
+			PlayUiSound(UiBackSound);
 			BackFromActiveScreen();
 			return FReply::Handled();
 		}
@@ -84,6 +90,7 @@ FReply UAgrarianMvpFrontendWidget::NativeOnKeyDown(const FGeometry& InGeometry,
 		const FKey Key = InKeyEvent.GetKey();
 		if (Key == EKeys::Enter || Key == EKeys::SpaceBar)
 		{
+			PlayUiSound(UiConfirmSound);
 			ConfirmActiveScreen();
 			return FReply::Handled();
 		}
@@ -93,12 +100,14 @@ FReply UAgrarianMvpFrontendWidget::NativeOnKeyDown(const FGeometry& InGeometry,
 		const FKey Key = InKeyEvent.GetKey();
 		if (Key == EKeys::Enter || Key == EKeys::SpaceBar || Key == EKeys::Escape)
 		{
+			PlayUiSound(UiConfirmSound);
 			ConfirmActiveScreen();
 			return FReply::Handled();
 		}
 
 		if (Key == EKeys::Q)
 		{
+			PlayUiSound(UiSaveQuitSound);
 			SaveAndQuit();
 			return FReply::Handled();
 		}
@@ -466,6 +475,14 @@ UButton* UAgrarianMvpFrontendWidget::AddButton(UVerticalBox* Parent, const FText
 	return Button;
 }
 
+void UAgrarianMvpFrontendWidget::PlayUiSound(USoundBase* Sound) const
+{
+	if (Sound)
+	{
+		UGameplayStatics::PlaySound2D(this, Sound);
+	}
+}
+
 void UAgrarianMvpFrontendWidget::FocusPrimaryButton()
 {
 	if (PrimaryFocusButton)
@@ -480,26 +497,31 @@ void UAgrarianMvpFrontendWidget::FocusPrimaryButton()
 
 void UAgrarianMvpFrontendWidget::HandlePrimaryActionClicked()
 {
+	PlayUiSound(UiConfirmSound);
 	ConfirmActiveScreen();
 }
 
 void UAgrarianMvpFrontendWidget::HandleBackClicked()
 {
+	PlayUiSound(UiBackSound);
 	BackFromActiveScreen();
 }
 
 void UAgrarianMvpFrontendWidget::HandleSaveAndQuitClicked()
 {
+	PlayUiSound(UiSaveQuitSound);
 	SaveAndQuit();
 }
 
 void UAgrarianMvpFrontendWidget::HandleMaleCharacterClicked()
 {
+	PlayUiSound(UiSelectionSound);
 	SetSelectedCharacterArchetype(EAgrarianMvpCharacterArchetype::YoungAdultMale);
 }
 
 void UAgrarianMvpFrontendWidget::HandleFemaleCharacterClicked()
 {
+	PlayUiSound(UiSelectionSound);
 	SetSelectedCharacterArchetype(EAgrarianMvpCharacterArchetype::YoungAdultFemale);
 }
 

Source/AgrarianGame/AgrarianMvpFrontendWidget.h

@@ -7,6 +7,7 @@
 #include "AgrarianMvpFrontendWidget.generated.h"
 
 class UButton;
+class USoundBase;
 class UTextBlock;
 class UVerticalBox;
 
@@ -57,6 +58,18 @@ public:
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|MVP UI")
 	bool bUseHighContrast = false;
 
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|MVP UI|Audio")
+	TObjectPtr<USoundBase> UiConfirmSound;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|MVP UI|Audio")
+	TObjectPtr<USoundBase> UiBackSound;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|MVP UI|Audio")
+	TObjectPtr<USoundBase> UiSelectionSound;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|MVP UI|Audio")
+	TObjectPtr<USoundBase> UiSaveQuitSound;
+
 	UFUNCTION(BlueprintCallable, Category = "Agrarian|MVP UI")
 	void SetActiveScreen(EAgrarianMvpFrontendScreen NewScreen);
 
@@ -90,6 +103,7 @@ private:
 	void RebuildFrontendTree();
 	UTextBlock* AddText(UVerticalBox* Parent, const FText& Text, int32 FontSize, bool bBold, const FLinearColor& Color, float BottomPadding);
 	UButton* AddButton(UVerticalBox* Parent, const FText& Text, const FLinearColor& NormalColor, const FLinearColor& HoveredColor, float BottomPadding);
+	void PlayUiSound(USoundBase* Sound) const;
 
 	UFUNCTION()
 	void FocusPrimaryButton();