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/threading/task/getpriority.md

@@ -0,0 +1,27 @@
+# ITask::GetPriority
+
+```cpp
+TaskPriority GetPriority() const
+```
+
+获取任务的优先级。
+
+**参数：** 无
+
+**返回：** `TaskPriority` - 当前任务的优先级
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+ITask* task = /* ... */;
+TaskPriority priority = task->GetPriority();
+if (priority == TaskPriority::Critical) {
+    printf("Critical task\n");
+}
+```
+
+## 相关文档
+
+- [ITask 总览](task.md) - 返回类总览