feat: devices in subscription rows, set_devices action, table columns

- Remove "Days" column from main table (each subscription shows own)
- Tariff column shows ALL subscription tariffs as comma-separated list
- Subscription sub-rows show device count with phone icon
- New bulk action "Изменить устройства" (set_devices) with input 1-50
- Update UserListItemSubscription type with device_limit field
- i18n: setDevices + deviceLimit keys (ru + en)

src/locales/en.json

@@ -2039,7 +2039,8 @@
         "addTraffic": "Add traffic",
         "addBalance": "Add balance",
         "assignPromoGroup": "Assign promo group",
-        "grantSubscription": "Grant subscription"
+        "grantSubscription": "Grant subscription",
+        "setDevices": "Set devices"
       },
       "params": {
         "days": "Number of days",
@@ -2047,7 +2048,8 @@
         "trafficGb": "Traffic amount (GB)",
         "balanceRub": "Amount (RUB)",
         "promoGroup": "Promo group",
-        "removePromoGroup": "Remove promo group"
+        "removePromoGroup": "Remove promo group",
+        "deviceLimit": "Device count"
       },
       "grantSubscription": {
         "warning": "Users who already have a subscription on the selected tariff will be skipped"