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/get-stride.md

@@ -0,0 +1,16 @@
+# D3D12Buffer::GetStride / SetStride
+
+## 函数签名
+
+```cpp
+uint32_t GetStride() const override
+void SetStride(uint32_t stride) override
+```
+
+## 中文描述
+
+获取和设置顶点缓冲区步长（字节）。
+
+## 复杂度
+
+O(1)