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/debug/profiler/shutdown.md

@@ -0,0 +1,22 @@
+# Profiler::Shutdown
+
+```cpp
+void Shutdown()
+```
+
+关闭性能分析器。清理内部数据结构，停止所有活动分析块，重置状态。在程序退出前调用。
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+XCEngine::Debug::Profiler::Get().Initialize();
+// ... 使用 Profiler ...
+XCEngine::Debug::Profiler::Get().ExportChromeTracing("profile.json");
+XCEngine::Debug::Profiler::Get().Shutdown();
+```
+
+## 相关文档
+
+- [Profiler 总览](profiler.md) - 返回类总览