feat: handle EntityEditNack and create test entities on domain connection

src/OverteClient.cpp

@@ -423,6 +423,17 @@ void OverteClient::parseDomainPacket(const char* data, size_t len) {
             parseEntityPacket(payload, payloadLen);
             break;
             
+        case PacketType::EntityEditNack:
+            std::cout << "[OverteClient] EntityEditNack received - entity creation/edit rejected" << std::endl;
+            if (payloadLen > 0) {
+                std::cout << "[OverteClient] Nack data (" << payloadLen << " bytes): ";
+                for (size_t i = 0; i < std::min(payloadLen, size_t(32)); i++) {
+                    printf("%02x ", (unsigned char)payload[i]);
+                }
+                std::cout << std::endl;
+            }
+            break;
+            
         case PacketType::EntityQueryInitialResultsComplete:
             std::cout << "[OverteClient] Entity query initial results complete" << std::endl;
             break;
@@ -802,6 +813,27 @@ void OverteClient::handleDomainListReply(const char* data, size_t len) {
     std::cout << "[OverteClient] Domain connected! Sending entity query..." << std::endl;
     sendEntityQuery();
     
+    // Create 3 test entities after connection
+    std::cout << "[OverteClient] Creating 3 test entities..." << std::endl;
+    
+    // Red Box at origin
+    createEntity("Red Box", EntityType::Box, 
+                 glm::vec3(0.0f, 1.5f, -2.0f),      // position
+                 glm::vec3(0.5f, 0.5f, 0.5f),       // dimensions
+                 glm::vec3(1.0f, 0.4f, 0.4f));      // red color
+    
+    // Green Sphere to the right
+    createEntity("Green Sphere", EntityType::Sphere,
+                 glm::vec3(1.2f, 1.5f, -2.0f),      // position
+                 glm::vec3(0.4f, 0.4f, 0.4f),       // dimensions
+                 glm::vec3(0.4f, 1.0f, 0.4f));      // green color
+    
+    // Blue Box to the left (tall)
+    createEntity("Blue Box", EntityType::Box,
+                 glm::vec3(-1.2f, 1.5f, -2.0f),     // position
+                 glm::vec3(0.3f, 0.8f, 0.3f),       // dimensions (tall)
+                 glm::vec3(0.4f, 0.4f, 1.0f));      // blue color
+    
     // Read number of nodes - Qt QDataStream format (signed int32, big-endian)
     // But for node list, Overte uses a special encoding
     // Looking at the packet: ff 01 00 06 43 23...