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/es-ES.json

@@ -6,7 +6,7 @@
   "cancel": "Cancelar",
   "close": "Cerrar",
   "save": "Guardar",
-  "logout": "Cerrar Sesión <3",
+  "logout": "Cerrar Sesión ❤️",
   "create": "Crear",
   "add": "Añadir",
   "remove": "Quitar",