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/ray/getpoint.md

@@ -0,0 +1,22 @@
+# Ray::GetPoint
+
+```cpp
+Vector3 GetPoint(float t) const
+```
+
+获取射线上指定距离处的点。
+
+**参数：**
+- `t` - 沿射线方向的参数距离
+
+**返回：** `Vector3` - 射线上的点 `origin + direction * t`
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Ray ray(cameraPosition, mouseRayDir.Normalized());
+float t = 100.0f;
+Vector3 point = ray.GetPoint(t);  // 沿射线方向 100 单位处的点
+```