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-state.md

@@ -0,0 +1,16 @@
+# D3D12Buffer::GetState / SetState
+
+## 函数签名
+
+```cpp
+ResourceStates GetState() const
+void SetState(ResourceStates state)
+```
+
+## 中文描述
+
+获取和设置当前资源状态。用于状态跟踪和屏障生成。
+
+## 复杂度
+
+O(1)