Bug Fix: Cursor Support in Score Editor

What Was the Issue?

Previously, the Score Editor only allowed users to delete from the end of expressions. This made mid-expression edits frustrating and time-consuming because users had to erase everything after the target position just to make a simple change.

以前，Score Editor 只能从表达式的末尾删除内容。这导致在表达式中间进行编辑非常繁琐且耗时，因为必须先删除目标位置之后的所有内容才能进行简单修改。

What’s Fixed

We’ve resolved this by introducing full cursor support, enabling precise editing at any position within an expression.

我们通过引入完整的光标支持解决了这个问题，使得可以在表达式中的任意位置进行精准编辑。

Key Fixes & Improvements

• Click-to-Position: Users can now click anywhere in an expression to place the cursor.
• Keyboard Navigation: Use arrow keys, Home, and End for smooth in-line movement.
• Direct Input: Type numbers, operators, and parentheses directly at the cursor’s position.
• Smart Insert/Delete: Edits happen exactly where the cursor is—no more forced end-only changes.
• Visual Feedback: A blinking cursor, hover effects, and focus indicators make editing clear and intuitive.
• 点击定位：现在可以在表达式的任意位置点击以放置光标。
• 键盘导航：使用箭头键、Home 和 End 键实现流畅的行内移动。
• 直接输入：可在光标位置直接输入数字、运算符和括号。
• 智能插入/删除：编辑发生在光标所在位置——不再仅限于末尾修改。
• 视觉反馈：闪烁光标、悬停效果和聚焦指示，使编辑过程清晰直观。