feat: resolve item icon paths from ItemDisplayInfo.dbc for Lua API

Add ItemIconPathResolver that lazily loads ItemDisplayInfo.dbc to map
displayInfoId → icon texture path. This fixes three Lua API functions
that previously returned nil for item icons:

- GetItemInfo() field 10 (texture) now returns the icon path
- GetActionTexture() for item-type action bar slots now returns icons
- GetLootSlotInfo() field 1 (texture) now returns proper item icons
  instead of incorrectly using the spell icon resolver

Follows the same lazy-loading pattern as SpellIconPathResolver. The DBC
is loaded once on first query and cached for all subsequent lookups.

include/game/game_handler.hpp

@@ -294,6 +294,13 @@ public:
         return spellIconPathResolver_ ? spellIconPathResolver_(spellId) : std::string{};
     }
 
+    // Item icon path resolver: displayInfoId -> texture path (e.g., "Interface\\Icons\\INV_Sword_04")
+    using ItemIconPathResolver = std::function<std::string(uint32_t)>;
+    void setItemIconPathResolver(ItemIconPathResolver r) { itemIconPathResolver_ = std::move(r); }
+    std::string getItemIconPath(uint32_t displayInfoId) const {
+        return itemIconPathResolver_ ? itemIconPathResolver_(displayInfoId) : std::string{};
+    }
+
     // Random property/suffix name resolver: randomPropertyId -> suffix name (e.g., "of the Eagle")
     // Positive IDs → ItemRandomProperties.dbc; negative IDs → ItemRandomSuffix.dbc (abs value)
     using RandomPropertyNameResolver = std::function<std::string(int32_t)>;
@@ -2662,6 +2669,7 @@ private:
     AddonChatCallback addonChatCallback_;
     AddonEventCallback addonEventCallback_;
     SpellIconPathResolver spellIconPathResolver_;
+    ItemIconPathResolver itemIconPathResolver_;
     RandomPropertyNameResolver randomPropertyNameResolver_;
     EmoteAnimCallback emoteAnimCallback_;
 

src/addons/lua_engine.cpp

@@ -766,7 +766,14 @@ static int lua_GetItemInfo(lua_State* L) {
     lua_pushstring(L, "");                           // 7: subclass
     lua_pushnumber(L, info->maxStack > 0 ? info->maxStack : 1); // 8: maxStack
     lua_pushstring(L, "");                           // 9: equipSlot
-    lua_pushnil(L);                                  // 10: texture (icon path — no ItemDisplayInfo icon resolver yet)
+    // 10: texture (icon path from ItemDisplayInfo.dbc)
+    if (info->displayInfoId != 0) {
+        std::string iconPath = gh->getItemIconPath(info->displayInfoId);
+        if (!iconPath.empty()) lua_pushstring(L, iconPath.c_str());
+        else lua_pushnil(L);
+    } else {
+        lua_pushnil(L);
+    }
     lua_pushnumber(L, info->sellPrice);              // 11: vendorPrice
     return 11;
 }
@@ -1393,11 +1400,10 @@ static int lua_GetLootSlotInfo(lua_State* L) {
     const auto& item = loot.items[slot - 1];
     const auto* info = gh->getItemInfo(item.itemId);
 
-    // texture (icon path — nil if not available)
+    // texture (icon path from ItemDisplayInfo.dbc)
     std::string icon;
-    if (info) {
-        // Try spell icon resolver as fallback for item icon
-        icon = gh->getSpellIconPath(item.itemId);
+    if (info && info->displayInfoId != 0) {
+        icon = gh->getItemIconPath(info->displayInfoId);
     }
     if (!icon.empty()) lua_pushstring(L, icon.c_str());
     else lua_pushnil(L);
@@ -1883,8 +1889,16 @@ static int lua_GetActionTexture(lua_State* L) {
             lua_pushstring(L, icon.c_str());
             return 1;
         }
+    } else if (action.type == game::ActionBarSlot::ITEM && action.id != 0) {
+        const auto* info = gh->getItemInfo(action.id);
+        if (info && info->displayInfoId != 0) {
+            std::string icon = gh->getItemIconPath(info->displayInfoId);
+            if (!icon.empty()) {
+                lua_pushstring(L, icon.c_str());
+                return 1;
+            }
+        }
     }
-    // For items we don't have icon resolution yet (needs ItemDisplayInfo DBC)
     lua_pushnil(L);
     return 1;
 }

src/core/application.cpp

@@ -413,6 +413,32 @@ bool Application::initialize() {
                     return pit->second;
                 });
             }
+            // Wire item icon path resolver: displayInfoId -> "Interface\\Icons\\INV_..."
+            {
+                auto iconNames = std::make_shared<std::unordered_map<uint32_t, std::string>>();
+                auto loaded    = std::make_shared<bool>(false);
+                auto* am = assetManager.get();
+                gameHandler->setItemIconPathResolver([iconNames, loaded, am](uint32_t displayInfoId) -> std::string {
+                    if (!am || displayInfoId == 0) return {};
+                    if (!*loaded) {
+                        *loaded = true;
+                        auto dbc = am->loadDBC("ItemDisplayInfo.dbc");
+                        const auto* dispL = pipeline::getActiveDBCLayout() ? pipeline::getActiveDBCLayout()->getLayout("ItemDisplayInfo") : nullptr;
+                        if (dbc && dbc->isLoaded()) {
+                            uint32_t iconField = dispL ? (*dispL)["InventoryIcon"] : 5;
+                            for (uint32_t i = 0; i < dbc->getRecordCount(); i++) {
+                                uint32_t id = dbc->getUInt32(i, 0); // field 0 = ID
+                                std::string name = dbc->getString(i, iconField);
+                                if (id > 0 && !name.empty()) (*iconNames)[id] = name;
+                            }
+                            LOG_INFO("Loaded ", iconNames->size(), " item icon names from ItemDisplayInfo.dbc");
+                        }
+                    }
+                    auto it = iconNames->find(displayInfoId);
+                    if (it == iconNames->end()) return {};
+                    return "Interface\\Icons\\" + it->second;
+                });
+            }
             // Wire random property/suffix name resolver for item display
             {
                 auto propNames   = std::make_shared<std::unordered_map<int32_t, std::string>>();