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/swap-chain/set-fullscreen.md

@@ -0,0 +1,36 @@
+# D3D12SwapChain::SetFullscreen
+
+## 函数签名
+
+```cpp
+void SetFullscreen(bool fullscreen) override
+```
+
+## 中文描述
+
+设置全屏模式。
+
+## 参数
+
+| 参数 | 类型 | 描述 |
+|------|------|------|
+| `fullscreen` | `bool` | 是否全屏 |
+
+## 返回值
+
+无
+
+## 复杂度
+
+O(1)
+
+## 示例
+
+```cpp
+swapChain->SetFullscreen(true);
+```
+
+## 相关文档
+
+- [D3D12SwapChain](swap-chain.md) - 类总览
+- [D3D12SwapChain::IsFullscreen](is-fullscreen.md) - 检查全屏状态