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/swap-chain/set-fullscreen.md

@@ -0,0 +1,20 @@
+# RHISwapChain::SetFullscreen
+
+```cpp
+virtual void SetFullscreen(bool fullscreen) = 0;
+```
+
+设置全屏模式。
+
+**参数：**
+- `fullscreen` - 是否全屏
+
+**示例：**
+
+```cpp
+swapChain->SetFullscreen(true);
+```
+
+## 相关文档
+
+- [RHISwapChain 总览](swap-chain.md) - 返回类总览