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-gpu-address.md

@@ -0,0 +1,19 @@
+# D3D12Buffer::GetGPUAddress
+
+## 函数签名
+
+```cpp
+uint64_t GetGPUAddress() const
+```
+
+## 中文描述
+
+获取 GPU 地址（等同于 `GetGPUVirtualAddress`）。
+
+## 返回值
+
+`uint64_t` - GPU 地址
+
+## 复杂度
+
+O(1)