feat(invite): show App download page after phone-invite registration

Phone-invited users are mobile App users, not web admin users.
After accepting a phone invitation, display App download QR + APK link
instead of redirecting to /dashboard.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

it0-web-admin/src/app/(auth)/invite/[token]/page.tsx

@@ -3,6 +3,7 @@
 import { useState, useEffect } from 'react';
 import { useRouter, useParams } from 'next/navigation';
 import Link from 'next/link';
+import QRCode from 'react-qr-code';
 import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 
@@ -36,6 +37,8 @@ export default function AcceptInvitePage() {
   const [confirmPassword, setConfirmPassword] = useState('');
   const [isSubmitting, setIsSubmitting] = useState(false);
   const [submitError, setSubmitError] = useState<string | null>(null);
+  const [registered, setRegistered] = useState(false);
+  const [downloadUrl, setDownloadUrl] = useState<string | null>(null);
 
   useEffect(() => {
     async function validateInvite() {
@@ -78,7 +81,17 @@ export default function AcceptInvitePage() {
         }
       } catch { /* ignore */ }
 
+      if (invite?.phone) {
+        // Phone invite = mobile App user, show App download page
+        const url = await fetch('/api/app/version/check?platform=android&current_version_code=0')
+          .then((r) => r.json())
+          .then((d) => d?.downloadUrl || null)
+          .catch(() => null);
+        setDownloadUrl(url);
+        setRegistered(true);
+      } else {
         router.push('/dashboard');
+      }
     } catch (err) {
       setSubmitError(err instanceof Error ? err.message : 'Failed to accept invitation');
     } finally {
@@ -109,6 +122,38 @@ export default function AcceptInvitePage() {
     );
   }
 
+  if (registered) {
+    return (
+      <div className="w-full max-w-md p-8 space-y-6 bg-card rounded-lg border text-center">
+        <img src="/icons/logo.svg" alt="iAgent" className="w-16 h-16 mx-auto" />
+        <div>
+          <h1 className="text-2xl font-bold text-green-500">注册成功！</h1>
+          <p className="text-muted-foreground mt-2 text-sm">
+            欢迎加入 <span className="font-medium">{invite?.tenantName}</span>，请下载 App 开始使用
+          </p>
+        </div>
+        {downloadUrl ? (
+          <div className="space-y-3">
+            <div className="flex justify-center">
+              <div className="bg-white p-3 rounded-lg inline-block">
+                <QRCode value={downloadUrl} size={160} />
+              </div>
+            </div>
+            <p className="text-xs text-muted-foreground">扫码下载 Android App</p>
+            <a
+              href={downloadUrl}
+              className="inline-block px-5 py-2.5 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90"
+            >
+              直接下载 APK
+            </a>
+          </div>
+        ) : (
+          <p className="text-sm text-muted-foreground">请向管理员获取 App 下载链接</p>
+        )}
+      </div>
+    );
+  }
+
   return (
     <div className="w-full max-w-md p-8 space-y-6 bg-card rounded-lg border">
       <div className="text-center">