Changes

• Reverted the earlier approach because it relied on JS column-width measurement and locking the table layout on first render. That made the table too rigid and caused regressions in real hosted forms, especially in responsive/container-based layouts where the table needs to resize after load.
• Replaced it with a CSS-only solution for edit mode. Instead of recalculating and fixing column widths in JS, the editor is positioned inside the existing cell so editing doesn’t change the table’s layout or push adjacent columns.

Checklist before requesting a review

• Cleaned up debug prints, comments, and unused code
• Tested end to end
• Included screenshots or walkthrough video of change if impacts UX

Related pull requests

PR #1597

Link other PRs here that are related to this change