资产系统侧线第一波：ResolveProcedural 提为公共静态（键格式唯一定义点）；Inspector 程序化模型入口；修 Prefab hover 误导性 not loaded；Content Browser 模型拖拽 → Outliner 创建实体

App/editor/panels/HierarchyPanel.cpp

@@ -49,6 +49,30 @@ namespace {
             *ctx.scene, *ctx.assets, path);
     }
 
+    // 模型拖入落点：创建带 MeshRenderer 的单实体（名字 = 文件名
+    // stem，默认位姿；模型句柄 = LoadModel 磁盘路径）。拖到节点下 =
+    // SetParent keepWorld；空白区 = 场景根。加载失败不建空实体
+    entt::entity SpawnModelDrop(const EditorContext& ctx, const char* path)
+    {
+        if (!ctx.scene || !ctx.assets || !path) {
+            return entt::null;
+        }
+        const auto model = ctx.assets->LoadModel(path);
+        if (!model.Valid()) {
+            return entt::null;
+        }
+        std::string name =
+            std::filesystem::path(path).stem().string();
+        if (name.empty()) {
+            name = "model entity";
+        }
+        auto e = ctx.scene->CreateEntity(name);
+        e.AddComponent<Engine::ECS::MeshRendererComponent>().model = model;
+        ENGINE_INFO("Hierarchy: model entity '{}' created from '{}'",
+                    name, path);
+        return static_cast<entt::entity>(e);
+    }
+
     // 实体名 → 合法文件名（路径分隔符/保留符净化；空名兜底）
     std::string PrefabFileName(std::string name)
     {
@@ -136,6 +160,15 @@ namespace {
                     selected = root;
                 }
             }
+            if (const ImGuiPayload* pl =
+                    ImGui::AcceptDragDropPayload(kModelDragPayload)) {
+                if (const entt::entity me = SpawnModelDrop(
+                        ctx, static_cast<const char*>(pl->Data));
+                    me != entt::null) {
+                    ctx.scene->SetParent(me, e);   // keepWorld 默认 true
+                    selected = me;
+                }
+            }
             ImGui::EndDragDropTarget();
         }
 
@@ -273,6 +306,14 @@ void HierarchyPanel::Draw(const EditorContext& ctx, entt::entity& selected)
                     selected = root;
                 }
             }
+            if (const ImGuiPayload* pl =
+                    ImGui::AcceptDragDropPayload(kModelDragPayload)) {
+                if (const entt::entity me = SpawnModelDrop(
+                        ctx, static_cast<const char*>(pl->Data));
+                    me != entt::null) {
+                    selected = me;
+                }
+            }
             ImGui::EndDragDropTarget();
         }
     }