Allow editing expression after pressing '='

[isaacmahyoub]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Summary

Allow users to tap directly on the calculation expression after pressing = to edit specific numbers or operators.

Proposed Behavior

• Tap anywhere on the expression field to place the cursor.
• Modify or delete specific numbers/operators inline.
• Recalculate without needing to re-enter the entire equation.

Why do you want this feature?

Current Problem

Once = is pressed, the expression field becomes non-interactive.

Impact

• If a typo is made in a long calculation, the user cannot fix a single digit.
• The user is forced to clear the screen and re-type the entire formula from scratch, leading to a frustrating user experience.

Additional information

No response