feat(sub): expose last subscription fetch time (#6217)

* feat(sub): expose last subscription fetch time

Record successful GET subscription fetches per client and surface the timestamp in the client API and UI.

* fix(frontend): include last subscription fetch in client traffic

* Update sub_fetch_test.go

---------

Co-authored-by: Hermes Agent <hermes-agent@localhost>

internal/web/translation/ar-EG.json

@@ -66,6 +66,7 @@
   "comment": "تعليق",
   "success": "تم بنجاح",
   "lastOnline": "آخر متصل",
+  "lastSubFetch": "آخر جلب للاشتراك",
   "getVersion": "جيب النسخة",
   "install": "تثبيت",
   "clients": "عملاء",

internal/web/translation/en-US.json

@@ -66,6 +66,7 @@
   "comment": "Comment",
   "success": "Success",
   "lastOnline": "Last Online",
+  "lastSubFetch": "Last Subscription Fetch",
   "getVersion": "Get Version",
   "install": "Install",
   "clients": "Clients",

internal/web/translation/es-ES.json

@@ -66,6 +66,7 @@
   "comment": "Comentario",
   "success": "Éxito",
   "lastOnline": "Última conexión",
+  "lastSubFetch": "Última descarga de suscripción",
   "getVersion": "Obtener versión",
   "install": "Instalar",
   "clients": "Clientes",

internal/web/translation/fa-IR.json

@@ -66,6 +66,7 @@
   "comment": "توضیحات",
   "success": "موفق",
   "lastOnline": "آخرین فعالیت",
+  "lastSubFetch": "آخرین دریافت اشتراک",
   "getVersion": "دریافت نسخه",
   "install": "نصب",
   "clients": "کاربران",

internal/web/translation/id-ID.json

@@ -66,6 +66,7 @@
   "comment": "Komentar",
   "success": "Berhasil",
   "lastOnline": "Terakhir online",
+  "lastSubFetch": "Pengambilan langganan terakhir",
   "getVersion": "Dapatkan Versi",
   "install": "Instal",
   "clients": "Klien",

internal/web/translation/ja-JP.json

@@ -66,6 +66,7 @@
   "comment": "コメント",
   "success": "成功",
   "lastOnline": "最終オンライン",
+  "lastSubFetch": "最終サブスクリプション取得",
   "getVersion": "バージョン取得",
   "install": "インストール",
   "clients": "クライアント",

internal/web/translation/pt-BR.json

@@ -66,6 +66,7 @@
   "comment": "Comentário",
   "success": "Com Sucesso",
   "lastOnline": "Última vez online",
+  "lastSubFetch": "Última busca da assinatura",
   "getVersion": "Obter Versão",
   "install": "Instalar",
   "clients": "Clientes",

internal/web/translation/ru-RU.json

@@ -66,6 +66,7 @@
   "comment": "Комментарий",
   "success": "Успешно",
   "lastOnline": "Был(а) в сети",
+  "lastSubFetch": "Последнее получение подписки",
   "getVersion": "Узнать версию",
   "install": "Установка",
   "clients": "Клиенты",

internal/web/translation/tr-TR.json

@@ -66,6 +66,7 @@
   "comment": "Yorum",
   "success": "Başarılı",
   "lastOnline": "Son Çevrimiçi",
+  "lastSubFetch": "Son abonelik çekme",
   "getVersion": "Sürümü Al",
   "install": "Yükle",
   "clients": "Kullanıcılar",

internal/web/translation/uk-UA.json

@@ -66,6 +66,7 @@
   "comment": "Коментар",
   "success": "Успішно",
   "lastOnline": "Був(ла) онлайн",
+  "lastSubFetch": "Останнє отримання підписки",
   "getVersion": "Отримати версію",
   "install": "Встановити",
   "clients": "Клієнти",

internal/web/translation/vi-VN.json

@@ -66,6 +66,7 @@
   "comment": "Bình luận",
   "success": "Thành công",
   "lastOnline": "Lần online gần nhất",
+  "lastSubFetch": "Lần tải gói đăng ký gần nhất",
   "getVersion": "Lấy phiên bản",
   "install": "Cài đặt",
   "clients": "Các khách hàng",

internal/web/translation/zh-CN.json

@@ -66,6 +66,7 @@
   "comment": "评论",
   "success": "成功",
   "lastOnline": "上次在线",
+  "lastSubFetch": "上次获取订阅",
   "getVersion": "获取版本",
   "install": "安装",
   "clients": "客户端",

internal/web/translation/zh-TW.json

@@ -66,6 +66,7 @@
   "comment": "評論",
   "success": "成功",
   "lastOnline": "上次上線",
+  "lastSubFetch": "上次取得訂閱",
   "getVersion": "獲取版本",
   "install": "安裝",
   "clients": "客戶端",