Add comprehensive UI sound manager for interface interactions

Implemented complete UI sound system with 32+ interface sounds:

Window sounds (10 types):
- Bag open/close (backpack, containers)
- Quest log open/close
- Character sheet open/close
- Auction house open/close
- Guild bank open/close

Button sounds (2 types):
- Interface button clicks
- Main menu button clicks

Quest sounds (4 types):
- Quest activate (new quest accepted)
- Quest complete (quest turned in)
- Quest failed
- Quest update (progress notification)

Loot sounds (3 types):
- Coin pickup (small/large amounts)
- Item loot from creatures

Item sounds (6 types):
- Drop item on ground
- Pickup sounds by item type: bags, books, cloth, food, gems

Eating/Drinking (2 types):
- Eating food sound
- Drinking potion/water sound

Special sounds:
- Level up fanfare
- Error/invalid action feedback
- Target select/deselect

Technical details:
- Loads 32 sound files from Sound\Interface directory
- Volume at 0.7 with global scale control
- Simple API: playBagOpen(), playQuestComplete(), etc.
- Ready for integration with UI systems and game events
- Can be hooked to ImGui windows, inventory actions, quest system

include/audio/ui_sound_manager.hpp

@@ -0,0 +1,131 @@
+#pragma once
+
+#include <vector>
+#include <memory>
+#include <string>
+#include <cstdint>
+
+namespace wowee {
+namespace pipeline {
+class AssetManager;
+}
+
+namespace audio {
+
+class UISoundManager {
+public:
+    UISoundManager() = default;
+    ~UISoundManager() = default;
+
+    // Initialization
+    bool initialize(pipeline::AssetManager* assets);
+    void shutdown();
+
+    // Volume control
+    void setVolumeScale(float scale);
+
+    // Window sounds
+    void playBagOpen();
+    void playBagClose();
+    void playQuestLogOpen();
+    void playQuestLogClose();
+    void playCharacterSheetOpen();
+    void playCharacterSheetClose();
+    void playAuctionHouseOpen();
+    void playAuctionHouseClose();
+    void playGuildBankOpen();
+    void playGuildBankClose();
+
+    // Button sounds
+    void playButtonClick();
+    void playMenuButtonClick();
+
+    // Quest sounds
+    void playQuestActivate();
+    void playQuestComplete();
+    void playQuestFailed();
+    void playQuestUpdate();
+
+    // Loot sounds
+    void playLootCoinSmall();
+    void playLootCoinLarge();
+    void playLootItem();
+
+    // Item sounds
+    void playDropOnGround();
+    void playPickupBag();
+    void playPickupBook();
+    void playPickupCloth();
+    void playPickupFood();
+    void playPickupGem();
+
+    // Eating/drinking
+    void playEating();
+    void playDrinking();
+
+    // Level up
+    void playLevelUp();
+
+    // Error/feedback
+    void playError();
+    void playTargetSelect();
+    void playTargetDeselect();
+
+private:
+    struct UISample {
+        std::string path;
+        std::vector<uint8_t> data;
+        bool loaded;
+    };
+
+    // Sound libraries
+    std::vector<UISample> bagOpenSounds_;
+    std::vector<UISample> bagCloseSounds_;
+    std::vector<UISample> questLogOpenSounds_;
+    std::vector<UISample> questLogCloseSounds_;
+    std::vector<UISample> characterSheetOpenSounds_;
+    std::vector<UISample> characterSheetCloseSounds_;
+    std::vector<UISample> auctionOpenSounds_;
+    std::vector<UISample> auctionCloseSounds_;
+    std::vector<UISample> guildBankOpenSounds_;
+    std::vector<UISample> guildBankCloseSounds_;
+
+    std::vector<UISample> buttonClickSounds_;
+    std::vector<UISample> menuButtonSounds_;
+
+    std::vector<UISample> questActivateSounds_;
+    std::vector<UISample> questCompleteSounds_;
+    std::vector<UISample> questFailedSounds_;
+    std::vector<UISample> questUpdateSounds_;
+
+    std::vector<UISample> lootCoinSmallSounds_;
+    std::vector<UISample> lootCoinLargeSounds_;
+    std::vector<UISample> lootItemSounds_;
+
+    std::vector<UISample> dropSounds_;
+    std::vector<UISample> pickupBagSounds_;
+    std::vector<UISample> pickupBookSounds_;
+    std::vector<UISample> pickupClothSounds_;
+    std::vector<UISample> pickupFoodSounds_;
+    std::vector<UISample> pickupGemSounds_;
+
+    std::vector<UISample> eatingSounds_;
+    std::vector<UISample> drinkingSounds_;
+
+    std::vector<UISample> levelUpSounds_;
+
+    std::vector<UISample> errorSounds_;
+    std::vector<UISample> selectTargetSounds_;
+    std::vector<UISample> deselectTargetSounds_;
+
+    // State tracking
+    float volumeScale_ = 1.0f;
+    bool initialized_ = false;
+
+    // Helper methods
+    bool loadSound(const std::string& path, UISample& sample, pipeline::AssetManager* assets);
+    void playSound(const std::vector<UISample>& library);
+};
+
+} // namespace audio
+} // namespace wowee