feat: add HTTP API and complete client workflows

src/apps/client/ClientTemplatesPage.tsx

@@ -1,7 +1,7 @@
 import { useEffect, useMemo, useRef, useState } from 'react';
 import { Edit3, MessageSquare, Plus, Search, Trash2 } from 'lucide-react';
 import { Button, Input, Modal, Pagination, Select, Tag, Textarea } from '@/components/ui';
-import { clientApi, type ClientSmsApplication, type ClientSmsSignature, type ClientSmsTemplate } from '@/api/adminApi';
+import { clientApi, type ClientSmsApplication, type ClientSmsSignatureView, type ClientSmsTemplate } from '@/api/adminApi';
 import { formatDateTime } from '@/utils/dateTime';
 import { replaceLeadingSmsSignature } from '@/utils/smsSignature';
 
@@ -69,7 +69,7 @@ function TemplateModal({
   item?: ClientSmsTemplate;
   onClose: () => void;
   onSubmit: (state: TemplateFormState) => void;
-  signatures: ClientSmsSignature[];
+  signatures: ClientSmsSignatureView[];
 }) {
   const [customVariable, setCustomVariable] = useState('');
   const [variablesOpen, setVariablesOpen] = useState(false);
@@ -208,7 +208,7 @@ function TemplateModal({
 export function ClientTemplatesPage() {
   const [applications, setApplications] = useState<ClientSmsApplication[]>([]);
   const [templates, setTemplates] = useState<ClientSmsTemplate[]>([]);
-  const [signatures, setSignatures] = useState<ClientSmsSignature[]>([]);
+  const [signatures, setSignatures] = useState<ClientSmsSignatureView[]>([]);
   const [keyword, setKeyword] = useState('');
   const [error, setError] = useState('');
   const [loading, setLoading] = useState(true);