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/transform/tomatrix.md

@@ -0,0 +1,19 @@
+# Transform::ToMatrix
+
+```cpp
+Matrix4 ToMatrix() const
+```
+
+将变换转换为 4x4 变换矩阵。
+
+**返回：** `Matrix4` - TRS 变换矩阵
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Transform t;
+t.position = Vector3(1.0f, 2.0f, 3.0f);
+Matrix4 matrix = t.ToMatrix();
+```