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/shutdown.md

@@ -0,0 +1,20 @@
+# RHIDevice::Shutdown
+
+```cpp
+virtual void Shutdown() = 0;
+```
+
+关闭 RHI 设备，释放所有相关资源。
+
+**复杂度：** O(n) - 取决于管理的资源数量
+
+**示例：**
+
+```cpp
+device->Shutdown();
+delete device;
+```
+
+## 相关文档
+
+- [RHIDevice 总览](device.md) - 返回类总览