fix: improve doc link navigation and tree display

- Fix link resolution with proper relative/absolute path handling
- Improve link styling with underline decoration
- Hide leaf nodes from tree, only show directories
- Fix log file path for packaged app

docs/api/resources/resourcemanager/load.md

@@ -0,0 +1,32 @@
+# ResourceManager::Load
+
+```cpp
+template<typename T>
+ResourceHandle<T> Load(const Containers::String& path, ImportSettings* settings = nullptr)
+```
+
+同步加载资源。模板方法，根据路径生成 GUID，先在缓存中查找是否已加载；若未加载则查找对应类型的加载器并同步加载，然后将结果加入缓存。
+
+**参数：**
+- `path` - 资源路径
+- `settings` - 导入设置（可选）
+
+**返回：** `ResourceHandle<T>`，持有加载的资源
+
+**复杂度：** O(n)，取决于加载器实现
+
+**示例：**
+
+```cpp
+ResourceHandle<Texture> tex = ResourceManager::Get().Load<Texture>("textures/player.png");
+ResourceHandle<Mesh> mesh = ResourceManager::Get().Load<Mesh>("models/player.fbx");
+ResourceHandle<Material> mat = ResourceManager::Get().Load<Material>("materials/player.mat");
+
+if (tex.IsValid()) {
+    // 使用纹理...
+}
+```
+
+## 相关文档
+
+- [ResourceManager 总览](resourcemanager.md) - 返回类总览