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/d3d12/command-queue/get-completed-value.md

@@ -0,0 +1,15 @@
+# D3D12CommandQueue::GetCompletedValue
+
+```cpp
+uint64_t GetCompletedValue() override;
+```
+
+获取已完成值。
+
+**返回：** 栅栏已完成的值
+
+**复杂度：** O(1)
+
+## 相关文档
+
+- [D3D12CommandQueue 总览](command-queue.md) - 返回类总览