added npc's gift

src/ScriptEngine.cpp

@@ -138,9 +138,64 @@ namespace ZL {
             return game->inventory.hasItem(id);
             });
 
+        // receive_npc_gift(npc_index)
+        api.set_function("receive_npc_gift", [game](int npcIndex) {
+            std::cout << "[script] receive_npc_gift: npc index " << npcIndex << std::endl;
+
+            auto& npcs = game->npcs;
+            if (npcIndex < 0 || npcIndex >= static_cast<int>(npcs.size())) {
+                std::cerr << "[script] receive_npc_gift: index out of range\n";
+                return;
+            }
+
+            auto& npc = npcs[npcIndex];
+            if (!npc) {
+                std::cerr << "[script] receive_npc_gift: npc is null\n";
+                return;
+            }
+
+            if (npc->giftReceived) {
+                std::cout << "[script] NPC " << npc->npcName << " already gave gift\n";
+                return;
+            }
+
+            if (npc->giftItem.id.empty()) {
+                std::cerr << "[script] receive_npc_gift: NPC has no gift\n";
+                return;
+            }
+
+            game->inventory.addItem(npc->giftItem);
+            npc->giftReceived = true;
+
+            std::cout << "[script] Received gift from " << npc->npcName << ": "
+                << npc->giftItem.name << std::endl;
+            });
+
         lua.script_file("resources/start.lua");
     }
 
+    void ScriptEngine::callNpcInteractCallback(int npcIndex) {
+        if (!impl) {
+            std::cerr << "[SCRIPT] Engine not initialized!" << std::endl;
+            return;
+        }
+        sol::state& lua = impl->lua;
+        sol::function fn = lua["on_npc_interact"];
+        if (fn.valid()) {
+            auto result = fn(npcIndex);
+            if (!result.valid()) {
+                sol::error err = result;
+                std::cerr << "[SCRIPT] on_npc_interact error: " << err.what() << "\n";
+            }
+            else {
+                std::cout << "[SCRIPT] on_npc_interact called with index " << npcIndex << std::endl;
+            }
+        }
+        else {
+            std::cerr << "[SCRIPT] Lua function 'on_npc_interact' not found!" << std::endl;
+        }
+    }
+
     void ScriptEngine::runScript(const std::string& path) {
         auto result = impl->lua.safe_script_file(path, sol::script_pass_on_error);
         if (!result.valid()) {