feat: add inline referral commission editing in admin user card

Admins can now edit individual referral commission percent directly
in the user detail card. Shows "Default" when no custom value is set.

src/locales/ru.json

@@ -2439,7 +2439,9 @@
           "title": "Реферальная программа",
           "referrals": "Рефералов",
           "earned": "Заработано",
-          "commission": "Комиссия"
+          "commission": "Комиссия",
+          "default": "По умолч.",
+          "invalidPercent": "Процент должен быть от 0 до 100"
         },
         "restrictions": {
           "title": "Ограничения",