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/getstatus.md

@@ -0,0 +1,32 @@
+# ITask::GetStatus
+
+```cpp
+TaskStatus GetStatus() const
+```
+
+获取任务的当前状态。
+
+**参数：** 无
+
+**返回：** `TaskStatus` - 当前任务状态
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+ITask* task = /* ... */;
+TaskStatus status = task->GetStatus();
+switch (status) {
+    case TaskStatus::Pending:   printf("Pending\n"); break;
+    case TaskStatus::Scheduled: printf("Scheduled\n"); break;
+    case TaskStatus::Running:   printf("Running\n"); break;
+    case TaskStatus::Completed: printf("Completed\n"); break;
+    case TaskStatus::Failed:   printf("Failed\n"); break;
+    case TaskStatus::Canceled:  printf("Canceled\n"); break;
+}
+```
+
+## 相关文档
+
+- [ITask 总览](task.md) - 返回类总览