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/multiplypoint.md

@@ -0,0 +1,21 @@
+# Matrix4::MultiplyPoint
+
+```cpp
+Vector3 MultiplyPoint(const Vector3& v) const
+```
+
+使用矩阵变换点（包含平移）。
+
+**参数：**
+- `v` - 要变换的点
+
+**返回：** `Vector3` - 变换后的点
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Matrix4 model = Matrix4::TRS(pos, rot, scale);
+Vector3 worldPos = model.MultiplyPoint(localPos);
+```