fix: harden admin and CMPP delivery workflows

src/apps/admin/AdminEnterpriseTemplatesPage.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useState } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 import { Edit3, Eye, Plus, Search, Trash2 } from 'lucide-react';
 import { adminApi, type ClientSmsApplication, type ClientSmsSignature, type ClientSmsTemplate, type TenantOption } from '@/api/adminApi';
 import { formatDateTime } from '@/utils/dateTime';
@@ -84,6 +84,7 @@ function TemplateFormModal({
 }) {
   const [customVariable, setCustomVariable] = useState('');
   const [variablesOpen, setVariablesOpen] = useState(false);
+  const contentRef = useRef<HTMLTextAreaElement>(null);
   const [form, setForm] = useState<TemplateFormState>({
     tenantId: item?.tenantId ?? '',
     applicationId: item?.applicationId ?? '',
@@ -110,7 +111,15 @@ function TemplateFormModal({
     if (!normalized) {
       return;
     }
-    setContent(`${form.content}\${${normalized}}`);
+    const token = `\${${normalized}}`;
+    const textarea = contentRef.current;
+    const start = textarea?.selectionStart ?? form.content.length;
+    const end = textarea?.selectionEnd ?? start;
+    setContent(`${form.content.slice(0, start)}${token}${form.content.slice(end)}`);
+    requestAnimationFrame(() => {
+      contentRef.current?.focus();
+      contentRef.current?.setSelectionRange(start + token.length, start + token.length);
+    });
   }
 
   function updateVariableExample(name: string, example: string) {
@@ -170,6 +179,7 @@ function TemplateFormModal({
           placeholder="例如：尊敬的${name}，您的验证码为${code}。"
           required
           rows={8}
+          ref={contentRef}
           value={form.content}
         />
         <div className="template-form-meta">