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/descriptor-heap/descriptor-heap.md

@@ -0,0 +1,27 @@
+# D3D12DescriptorHeap
+
+**命名空间**: `XCEngine::RHI`
+
+**描述**: DirectX 12 描述符堆的 D3D12 实现，继承自 `RHIDescriptorPool`。
+
+## 公共方法
+
+| 方法 | 描述 |
+|------|------|
+| [`Initialize`](initialize-from-desc.md) | 从描述符初始化 |
+| [`Shutdown`](../../../threading/task-system/shutdown.md) | 关闭描述符堆 |
+| [`GetDescriptorHeap`](get-descriptor-heap.md) | 获取 D3D12 描述符堆 |
+| [`GetCPUDescriptorHandle`](get-cpu-descriptor-handle.md) | 获取 CPU 描述符句柄 |
+| [`GetGPUDescriptorHandle`](get-gpu-descriptor-handle.md) | 获取 GPU 描述符句柄 |
+| [`GetDescriptorCount`](get-descriptor-count.md) | 获取描述符数量 |
+| [`GetType`](../../command-queue/get-type.md) | 获取描述符类型 |
+| [`GetDescriptorSize`](get-descriptor-size.md) | 获取描述符大小 |
+| [`GetCPUDescriptorHandleForHeapStart`](get-cpu-descriptor-handle-for-heap-start.md) | 获取堆起始 CPU 句柄 |
+| [`GetGPUDescriptorHandleForHeapStart`](get-gpu-descriptor-handle-for-heap-start.md) | 获取堆起始 GPU 句柄 |
+| [`GetNativeHandle`](../../buffer/get-native-handle.md) | 获取原生句柄 |
+| [`CreateDesc`](create-desc.md) | 创建描述符（静态） |
+
+## 相关文档
+
+- [D3D12 后端总览](../../opengl/overview.md)
+- [RHIDescriptorPool](../../descriptor-pool/descriptor-pool.md) - 抽象描述符池接口