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/consolelogsink/flush.md

@@ -0,0 +1,22 @@
+# ConsoleLogSink::Flush
+
+```cpp
+void Flush() override
+```
+
+刷新标准输出流（stdout），调用 `fflush(stdout)` 确保所有待输出的日志内容立即显示在控制台上。
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+auto sink = std::make_unique<XCEngine::Debug::ConsoleLogSink>();
+XCEngine::Debug::Logger::Get().AddSink(std::move(sink));
+// 在程序异常退出前确保日志已输出
+XCEngine::Debug::Logger::Get().Flush();
+```
+
+## 相关文档
+
+- [ConsoleLogSink 总览](consolelogsink.md) - 返回类总览