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/setpriority.md

@@ -0,0 +1,28 @@
+# ITask::SetPriority
+
+```cpp
+void SetPriority(TaskPriority priority)
+```
+
+设置任务的优先级。
+
+**参数：**
+- `priority` - 新的优先级（参见 TaskPriority 枚举）
+
+**返回：** 无
+
+**复杂度：** O(1)
+
+**注意：** 任务提交后修改优先级可能不会立即生效，取决于任务系统实现。
+
+**示例：**
+
+```cpp
+auto task = std::make_unique<MyTask>();
+task->SetPriority(TaskPriority::High);
+TaskSystem::Get().Submit(std::move(task));
+```
+
+## 相关文档
+
+- [ITask 总览](task.md) - 返回类总览