Update API documentation and remove obsolete plan files
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docs/api/math/vector2/operator-mul.md
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docs/api/math/vector2/operator-mul.md
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# Vector2::operator*
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```cpp
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Vector2 operator*(float scalar) const
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```
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向量数乘,将向量与标量相乘。
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**参数:**
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- `scalar` - 标量值
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**返回:** `Vector2` - 缩放后的向量
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**线程安全:** ✅
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**复杂度:** O(1)
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**示例:**
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```cpp
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Vector2 v(2.0f, 3.0f);
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Vector2 scaled = v * 2.0f; // (4.0f, 6.0f)
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```
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## 相关文档
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- [Vector2 总览](vector2.md)
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- [`operator/`](operator-div.md) - 除法
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- [`operator*=`](operator-mul-assign.md) - 乘法赋值
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