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/setid.md

@@ -0,0 +1,28 @@
+# ITask::SetId
+
+```cpp
+void SetId(uint64_t id)
+```
+
+设置任务的唯一标识符。通常由 TaskSystem 在提交时自动分配。
+
+**参数：**
+- `id` - 要设置的唯一标识符
+
+**返回：** 无
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+class MyTask : public ITask {
+public:
+    MyTask() { SetId(GenerateId()); }
+    void Execute() override { /* ... */ }
+};
+```
+
+## 相关文档
+
+- [ITask 总览](task.md) - 返回类总览