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/memory/manager/shutdown.md

@@ -0,0 +1,35 @@
+# MemoryManager::Shutdown
+
+```cpp
+void Shutdown();
+```
+
+关闭内存管理器。执行内存泄漏检测报告，释放系统分配器。应在程序退出前调用。
+
+**参数：** 无
+
+**返回：** 无
+
+**复杂度：** O(n)
+
+**示例：**
+
+```cpp
+#include <XCEngine/Memory/MemoryManager.h>
+
+int main() {
+    MemoryManager::Get().Initialize();
+    
+    // ... 游戏主循环 ...
+    
+    // 程序退出前关闭
+    MemoryManager::Get().DumpMemoryLeaks();
+    MemoryManager::Get().Shutdown();
+    
+    return 0;
+}
+```
+
+## 相关文档
+
+- [MemoryManager 总览](manager.md) - 返回类总览