fix: improve doc link navigation and tree display

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docs/api/math/plane/intersects.md

@@ -0,0 +1,20 @@
+# Plane::Intersects
+
+```cpp
+bool Intersects(const Sphere& sphere) const
+```
+
+检测平面是否与球体相交。
+
+**参数：**
+- `sphere` - 要检测的球体
+
+**返回：** `bool` - true 表示相交
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+if (plane.Intersects(sphere)) { /* collision */ }
+```