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/find.md

@@ -0,0 +1,29 @@
+# ResourceManager::Find
+
+```cpp
+IResource* Find(const Containers::String& path)
+IResource* Find(ResourceGUID guid)
+```
+
+在资源缓存中查找资源。返回裸指针，不增加引用计数。
+
+**参数：**
+- `path` - 资源路径
+- `guid` - 资源全局唯一标识符
+
+**返回：** 找到则返回资源指针，否则返回 `nullptr`
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+IResource* res = ResourceManager::Get().Find("textures/player.png");
+if (res && res->IsValid()) {
+    Texture* tex = static_cast<Texture*>(res);
+}
+```
+
+## 相关文档
+
+- [ResourceManager 总览](resourcemanager.md) - 返回类总览