Replace '<3' with '❤️' in translations

Replace ASCII heart "<3" with Unicode heart emoji "❤️" in logout strings across translation files to improve visual consistency and rendering. Updated files in internal/web/translation for: ar-EG, en-US, es-ES, fa-IR, id-ID, ja-JP, pt-BR, ru-RU, tr-TR, uk-UA, vi-VN, zh-CN, and zh-TW.

internal/web/translation/fa-IR.json

@@ -6,7 +6,7 @@
   "cancel": "انصراف",
   "close": "بستن",
   "save": "ذخیره",
-  "logout": "خروج <3",
+  "logout": "خروج ❤️",
   "create": "ایجاد",
   "add": "افزودن",
   "remove": "حذف",