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/buffer/initialize.md

@@ -0,0 +1,39 @@
+# D3D12Buffer::Initialize
+
+## 函数签名
+
+```cpp
+bool Initialize(ID3D12Device* device, uint64_t size, D3D12_RESOURCE_STATES initialState = D3D12_RESOURCE_STATE_COMMON, D3D12_HEAP_TYPE heapType = D3D12_HEAP_TYPE_DEFAULT)
+```
+
+## 中文描述
+
+创建新缓冲区，分配 D3D12 显存资源。
+
+## 参数
+
+| 参数 | 类型 | 描述 |
+|------|------|------|
+| `device` | `ID3D12Device*` | D3D12 设备指针 |
+| `size` | `uint64_t` | 缓冲区大小（字节） |
+| `initialState` | `D3D12_RESOURCE_STATES` | 初始资源状态（默认 COMMON） |
+| `heapType` | `D3D12_HEAP_TYPE` | 堆类型：DEFAULT（默认）、UPLOAD（上传）、READBACK（回读） |
+
+## 返回值
+
+`bool` - 初始化是否成功
+
+## 复杂度
+
+O(n) - 取决于缓冲区大小
+
+## 示例
+
+```cpp
+D3D12Buffer vertexBuffer;
+vertexBuffer.Initialize(
+    device->GetDevice(),
+    sizeof(Vertex) * vertexCount,
+    D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER,
+    D3D12_HEAP_TYPE_DEFAULT);
+```