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/resourcehandle/get.md

@@ -0,0 +1,27 @@
+# ResourceHandle::Get
+
+```cpp
+T* Get() const
+```
+
+获取资源裸指针。返回句柄内部持有的资源指针，不进行任何引用计数操作。
+
+**参数：** 无
+
+**返回：** 资源裸指针，可能为 `nullptr`（当句柄为空时）
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+ResourceHandle<Texture> tex = ResourceManager::Get().Load<Texture>("tex.png");
+Texture* raw = tex.Get();
+if (raw != nullptr) {
+    uint32_t w = raw->GetWidth();
+}
+```
+
+## 相关文档
+
+- [ResourceHandle 总览](resourcehandle.md) - 返回类总览