🌍 fix: Enhance i18n Support & Optimize Category Handling (#5866)

* fix: Missing Translations in Prompt Filters in Prompt Library

* fix: fixed issue with `zh`
feat: added `Estonian` language option

* fix: test for `i18n.ts`

* refactor: `pt` --> `pt-BR` and `pt-PT`

* feat: request access to another language. default is only one language during invite.

client/src/locales/pl/translation.json

@@ -305,7 +305,9 @@
   "com_nav_lang_arabic": "العربية",
   "com_nav_lang_auto": "Automatyczne wykrywanie",
   "com_nav_lang_brazilian_portuguese": "Português Brasileiro",
+  "com_nav_lang_portuguese": "Português",
   "com_nav_lang_chinese": "中文",
+  "com_nav_lang_estonian": "Eesti keel",
   "com_nav_lang_dutch": "Nederlands",
   "com_nav_lang_english": "English",
   "com_nav_lang_finnish": "Suomi",
@@ -322,6 +324,7 @@
   "com_nav_lang_swedish": "Svenska",
   "com_nav_lang_turkish": "Türkçe",
   "com_nav_lang_vietnamese": "Tiếng Việt",
+  "com_nav_lang_traditional_chinese": "繁體中文",
   "com_nav_language": "Język",
   "com_nav_latex_parsing": "Parsowanie LaTeX w wiadomościach (może wpływać na wydajność)",
   "com_nav_log_out": "Wyloguj",