phsl / new-api

Summary:
• Updated `helpers/utils.js` to display the “group” label without a colon, ensuring consistent typography with other price elements.

Details:
1. `formatPriceInfo`
   – Changed `{t('分组')}:` to `{t('分组')}` for a cleaner look.
   – Keeps spacing intact between label and selected group name.
2. No functional impact; purely visual polish.