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/matrix4/getrotation.md

@@ -0,0 +1,18 @@
+# Matrix4::GetRotation
+
+```cpp
+Quaternion GetRotation() const
+```
+
+从矩阵中提取旋转分量。
+
+**返回：** `Quaternion` - 旋转四元数
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Matrix4 m = ...;
+Quaternion rotation = m.GetRotation();
+```