feat: improve admin trial settings controls

locales/en.json

@@ -1113,6 +1113,7 @@
   "admin_settings_secret_configured": "Secret is set",
   "admin_settings_secret_empty": "Not set",
   "admin_settings_badge_override": "Override",
+  "admin_settings_badge_dirty": "Changed",
   "admin_status_limited": "Limited",
   "admin_status_expired": "Expired",
   "admin_status_disabled": "Disabled",
@@ -1314,6 +1315,14 @@
   "admin_tariffs_trial_squads": "Trial Internal Squads",
   "admin_tariffs_trial_squads_hint": "These squads are applied when trial is activated. Empty value falls back to USER_SQUAD_UUIDS.",
   "admin_tariffs_trial_add_squad": "Add squad from panel",
+  "admin_tariffs_trial_group_switch": "Access",
+  "admin_tariffs_trial_group_switch_hint": "Turns trial activation on or off for users.",
+  "admin_tariffs_trial_group_general": "General settings",
+  "admin_tariffs_trial_group_general_hint": "Trial duration and traffic volume granted to the user.",
+  "admin_tariffs_trial_group_reset": "Traffic reset",
+  "admin_tariffs_trial_group_reset_hint": "Strategy Remnawave uses to refresh the trial traffic limit.",
+  "admin_tariffs_trial_group_squads": "Squads",
+  "admin_tariffs_trial_group_squads_hint": "Squads assigned to the user when trial access is activated.",
   "admin_tariffs_legacy_title": "Legacy tariff compatibility",
   "admin_tariffs_legacy_subtitle": "Old remnawave-tg-shop periods and traffic packages used only when the JSON tariff catalog is not configured.",
   "admin_tariffs_legacy_period": "Period",