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/logger/warning.md

@@ -0,0 +1,30 @@
+# Logger::Warning
+
+```cpp
+void Warning(LogCategory category, const Containers::String& message)
+```
+
+记录一条 Warning（3 级）日志。Warning 级别用于指示潜在问题但程序仍可继续运行的情况，如资源即将耗尽、配置值超出建议范围等。
+
+**参数：**
+- `category` - 日志分类
+- `message` - 日志消息内容
+
+**返回：** 无
+
+**复杂度：** O(n)，n 为注册的 Sink 数量
+
+**示例：**
+
+```cpp
+#include <XCEngine/Debug/Logger.h>
+
+XCEngine::Debug::Logger::Get().Warning(
+    XCEngine::Debug::LogCategory::Memory,
+    "Memory usage exceeds 80% of available heap"
+);
+```
+
+## 相关文档
+
+- [Logger 总览](logger.md) - 返回类总览