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/math/rect/rectint-gettop.md

@@ -0,0 +1,18 @@
+# RectInt::GetTop
+
+```cpp
+int32_t GetTop() const
+```
+
+获取矩形上边界。
+
+**返回：** `int32_t` - 上边界坐标 (y)
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+RectInt rect(10, 20, 100, 50);
+int32_t top = rect.GetTop();  // 20
+```