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-list/copy-buffer.md

@@ -0,0 +1,20 @@
+# D3D12CommandList::CopyBuffer
+
+```cpp
+void CopyBuffer(ID3D12Resource* dst, uint64_t dstOffset, ID3D12Resource* src, uint64_t srcOffset, uint64_t size);
+```
+
+复制缓冲区。
+
+**参数：**
+- `dst` - 目标缓冲区
+- `dstOffset` - 目标偏移
+- `src` - 源缓冲区
+- `srcOffset` - 源偏移
+- `size` - 复制大小
+
+**复杂度：** O(n)
+
+## 相关文档
+
+- [D3D12CommandList 总览](command-list.md) - 返回类总览