feat(message-gateway): add admin channel cards and per-type forms

frontend/app/(main)/admin/message-gateway/channels/telegram/form.tsx

@@ -0,0 +1,54 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+'use client';
+
+import { useTranslations } from 'next-intl';
+
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+
+export interface TelegramFormValue {
+  bot_token: string;
+  base_url: string;
+}
+
+interface TelegramFormProps {
+  value: TelegramFormValue;
+  onChange: (value: TelegramFormValue) => void;
+  keepSecretHint?: boolean;
+}
+
+export function TelegramForm({
+  value,
+  onChange,
+  keepSecretHint,
+}: TelegramFormProps) {
+  const t = useTranslations('admin.messageGateway');
+  return (
+    <div className='space-y-4'>
+      <div className='space-y-2'>
+        <Label htmlFor='mg-bot-token'>{t('botToken')}</Label>
+        <Input
+          id='mg-bot-token'
+          type='password'
+          autoComplete='off'
+          value={value.bot_token}
+          placeholder={
+            keepSecretHint ? t('keepSecretHint') : t('botTokenPlaceholder')
+          }
+          onChange={(e) => onChange({ ...value, bot_token: e.target.value })}
+        />
+      </div>
+      <div className='space-y-2'>
+        <Label htmlFor='mg-base-url'>{t('baseUrl')}</Label>
+        <Input
+          id='mg-base-url'
+          value={value.base_url}
+          placeholder={t('baseUrlPlaceholder')}
+          onChange={(e) => onChange({ ...value, base_url: e.target.value })}
+        />
+      </div>
+    </div>
+  );
+}