feat: add blacklisted user blocking screen

Add BlacklistedScreen component, blocking store type, API error interceptor,
and i18n translations (ru, en, zh, fa) for blacklisted users.

src/components/blocking/BlacklistedScreen.tsx

@@ -0,0 +1,48 @@
+import { useTranslation } from 'react-i18next';
+import { useBlockingStore } from '../../store/blocking';
+
+export default function BlacklistedScreen() {
+  const { t } = useTranslation();
+  const { blacklistedInfo } = useBlockingStore();
+
+  return (
+    <div className="fixed inset-0 z-[100] flex flex-col items-center justify-center bg-dark-950 p-6">
+      <div className="w-full max-w-md text-center">
+        {/* Icon */}
+        <div className="mb-8">
+          <div className="mx-auto flex h-24 w-24 items-center justify-center rounded-full bg-dark-800">
+            <svg
+              className="h-12 w-12 text-red-500"
+              fill="none"
+              viewBox="0 0 24 24"
+              stroke="currentColor"
+            >
+              <path
+                strokeLinecap="round"
+                strokeLinejoin="round"
+                strokeWidth={1.5}
+                d="M18.364 18.364A9 9 0 005.636 5.636m12.728 12.728A9 9 0 015.636 5.636m12.728 12.728L5.636 5.636"
+              />
+            </svg>
+          </div>
+        </div>
+
+        {/* Title */}
+        <h1 className="mb-4 text-2xl font-bold text-white">{t('blocking.blacklisted.title')}</h1>
+
+        {/* Message */}
+        <p className="mb-6 text-lg text-gray-400">{t('blocking.blacklisted.defaultMessage')}</p>
+
+        {/* Reason */}
+        {blacklistedInfo?.message && (
+          <div className="mb-6 rounded-xl bg-dark-800/50 p-4">
+            <p className="mb-1 text-sm text-gray-500">{t('blocking.blacklisted.reason')}:</p>
+            <p className="text-gray-300">{blacklistedInfo.message}</p>
+          </div>
+        )}
+
+        <p className="mt-8 text-sm text-gray-500">{t('blocking.blacklisted.contactSupport')}</p>
+      </div>
+    </div>
+  );
+}

src/components/blocking/index.ts

@@ -1,2 +1,3 @@
 export { default as MaintenanceScreen } from './MaintenanceScreen';
 export { default as ChannelSubscriptionScreen } from './ChannelSubscriptionScreen';
+export { default as BlacklistedScreen } from './BlacklistedScreen';