WP 成本估算及支付表单构建 10.3.1

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no change log for this version

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- visual step editor improved
- fixed issue with adding items to some columns
- form loading speed improved
- minor corrections & improvements

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no change log for this version

- form generation by AI
- price and quantity calculation generation by AI
- automatic translation of texts by AI

- backend system improved
- minor corrections & code improvements