🔠 refactor: refine group label formatting in price info

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.

web/src/components/table/model-pricing/view/card/PricingCardView.jsx

@@ -136,7 +136,7 @@ const PricingCardView = ({
       groupRatio,
       tokenUnit,
       displayPrice,
-      currency
+      currency,
     });
     return formatPriceInfo(priceData, t);
   };
@@ -302,7 +302,7 @@ const PricingCardView = ({
                           {t('补全')}: {model.quota_type === 0 ? parseFloat(model.completion_ratio.toFixed(3)) : t('无')}
                         </div>
                         <div>
-                          {t('分组')}: {groupRatio[selectedGroup]}
+                          {t('分组')}: {priceData.usedGroupRatio}
                         </div>
                       </div>
                     </div>