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/rhi/device/get-native-device.md

@@ -0,0 +1,29 @@
+# RHIDevice::GetNativeDevice
+
+```cpp
+virtual void* GetNativeDevice() = 0;
+```
+
+获取原生图形 API 设备指针。
+
+**返回：** 
+- D3D12 后端: `ID3D12Device*`
+- OpenGL 后端: `void*` (GLFWwindow* 或 GL 上下文指针)
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+void* nativeDevice = device->GetNativeDevice();
+
+// D3D12 使用
+ID3D12Device* d3d12Device = static_cast<ID3D12Device*>(nativeDevice);
+
+// OpenGL 使用
+GLFWwindow* glfwWindow = static_cast<GLFWwindow*>(nativeDevice);
+```
+
+## 相关文档
+
+- [RHIDevice 总览](device.md) - 返回类总览