fix: show locations count instead of servers on tariff cards

servers_count already represents squad count on backend.
Renamed display labels to "locations" on tariff cards and
confirmation view. Server names still shown in subscription card.

src/locales/fa.json

@@ -239,6 +239,8 @@
     "baseTariff": "تعرفه",
     "serversLabel": "سرورها",
     "servers_other": "{{count}} سرور",
+    "locationsLabel": "مکان‌ها",
+    "locations_other": "{{count}} مکان",
     "traffic": "ترافیک",
     "unlimited": "نامحدود",
     "used": "استفاده شده",