docs: update math API docs
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@@ -14,6 +14,10 @@ float Magnitude() const
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**返回:** `float` - 向量长度 sqrt(x * x + y * y)
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**线程安全:** ✅
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**异常:** (无)
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**复杂度:** O(1)
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**示例:**
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@@ -23,3 +27,9 @@ Vector2 v(3.0f, 4.0f);
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float len = v.Magnitude(); // 5.0f
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float len2 = Vector2::Magnitude(v); // 5.0f
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```
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## 相关文档
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- [Vector2](vector2.md) - 返回类总览
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- [SqrMagnitude](sqrmagnitude.md) - 长度平方(更快)
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- [Normalize](normalize.md) - 归一化向量
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