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/dependencygraph/addnode.md

@@ -0,0 +1,27 @@
+# ResourceDependencyGraph::AddNode
+
+```cpp
+void AddNode(ResourceGUID guid, ResourceType type)
+```
+
+向依赖图中添加一个新节点。如果节点已存在则忽略。
+
+**参数：**
+- `guid` - 资源的全局唯一标识符
+- `type` - 资源类型
+
+**返回：** 无
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+ResourceDependencyGraph graph;
+graph.AddNode(textureGuid, ResourceType::Texture);
+graph.AddNode(materialGuid, ResourceType::Material);
+```
+
+## 相关文档
+
+- [ResourceDependencyGraph 总览](dependencygraph.md) - 返回类总览