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/create-buffer.md

@@ -0,0 +1,32 @@
+# RHIDevice::CreateBuffer
+
+```cpp
+virtual RHIBuffer* CreateBuffer(const BufferDesc& desc) = 0;
+```
+
+创建 GPU 缓冲区资源。
+
+**参数：**
+- `desc` - 缓冲区描述符，包含大小、类型、标志等
+
+**返回：** 新创建的缓冲区指针，失败返回 `nullptr`
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+BufferDesc bufferDesc;
+bufferDesc.size = sizeof(Vertex) * vertexCount;
+bufferDesc.stride = sizeof(Vertex);
+bufferDesc.bufferType = (uint32_t)BufferType::Vertex;
+bufferDesc.flags = 0;
+
+RHIBuffer* vertexBuffer = device->CreateBuffer(bufferDesc);
+```
+
+## 相关文档
+
+- [RHIDevice 总览](device.md) - 返回类总览
+- [RHIBuffer](../buffer/buffer.md) - 缓冲区类
+- [BufferDesc](../types/types.md) - 缓冲区描述结构体