feat: complete i18n support for all components (6 languages)

Add full internationalization across 127+ components and pages.
790+ translation keys in en, tr, kmr, ckb, ar, fa locales.
Remove duplicate keys and delete unused .json locale files.

web/src/pages/NotFound.tsx

@@ -1,7 +1,9 @@
 import { useLocation } from "react-router-dom";
 import { useEffect } from "react";
+import { useTranslation } from 'react-i18next';
 
 const NotFound = () => {
+  const { t } = useTranslation();
   const location = useLocation();
 
   useEffect(() => {
@@ -14,10 +16,10 @@ const NotFound = () => {
   return (
     <div className="min-h-screen flex items-center justify-center bg-background">
       <div className="text-center p-8 rounded-lg border border-border bg-card shadow-md animate-slide-in">
-        <h1 className="text-5xl font-bold mb-6 text-primary">404</h1>
-        <p className="text-xl text-card-foreground mb-6">Page not found</p>
+        <h1 className="text-5xl font-bold mb-6 text-primary">{t('notFound.code')}</h1>
+        <p className="text-xl text-card-foreground mb-6">{t('notFound.message')}</p>
         <a href="/" className="text-primary hover:text-primary/80 underline transition-colors">
-          Return to Home
+          {t('notFound.backToHome')}
         </a>
       </div>
     </div>