注册支持用户名/手机号/邮箱 + 镜像站部署脚本 + AI 助手 Tool Calling 重构

- Prisma User 模型新增 username 字段（唯一索引）
- 注册先查重复再创建，返回友好中文提示（非 500）
- 登录支持用户名/手机号/邮箱三种方式
- 前端注册表单增加用户名输入框，预校验 2-20 位格式
- 新增 scripts/deploy.sh：一键构建并部署主站+镜像站+重启后端+重载 Nginx
- 镜像站 www.yuzhiran.com.cn Nginx 配置与主站同步
- AI 助手架构升级：用户端/管理后台均采用完整 Tool Calling 架构
- 新增 UserAiAssistantService（18 工具）+ AiAssistantController
- admin 助手新增 search + mark-all-notifications-read 工具
- 修复注册 500 错误：catch Prisma P2002 → BadRequestException
- Baidu Analytics Script 注入 root layout

frontend/src/components/layout/footer.tsx

@@ -4,12 +4,43 @@ import { useEffect, useState } from 'react';
 import Link from 'next/link';
 import { useT } from '@/i18n';
 import { API_BASE } from '@/lib/config';
+import Image from 'next/image';
+
+interface BeianInfo {
+  icp: string
+  gongan: string
+  gonganLink: string
+  showGongan: boolean
+}
+
+function getBeianInfo(): BeianInfo {
+  if (typeof window === 'undefined') {
+    return { icp: '京ICP备2026007249号-1', gongan: '京公网安备11011502039545号', gonganLink: 'https://beian.mps.gov.cn/#/query/webSearch?code=11011502039545', showGongan: true }
+  }
+  const hostname = window.location.hostname
+  if (hostname === 'yuzhiran.com' || hostname === 'www.yuzhiran.com') {
+    return { icp: '京ICP备2026007249号-1', gongan: '京公网安备11011502039545号', gonganLink: 'https://beian.mps.gov.cn/#/query/webSearch?code=11011502039545', showGongan: true }
+  }
+  if (hostname === 'yuzhiran.com.cn' || hostname === 'www.yuzhiran.com.cn') {
+    return { icp: '京ICP备2026007249号-2', gongan: '京公网安备11011502039622号', gonganLink: 'https://beian.mps.gov.cn/#/query/webSearch?code=11011502039622', showGongan: true }
+  }
+  return { icp: '京ICP备2026007249号-1', gongan: '京公网安备11011502039545号', gonganLink: 'https://beian.mps.gov.cn/#/query/webSearch?code=11011502039545', showGongan: true }
+}
+
+const qrCodes = [
+  { src: '/images/yzr/yuzhiran.jpg', alt: '微信公众号', label: '微信公众号' },
+  { src: '/images/yzr/yuzhiran-tech.jpg', alt: '微信服务号', label: '微信服务号' },
+  { src: '/images/yzr/yuzhiran-yhl.jpg', alt: '小程序', label: '小程序' },
+  { src: '/images/yzr/kefu.png', alt: '微信客服', label: '微信客服' },
+]
 
 export function Footer() {
   const t = useT();
   const [config, setConfig] = useState<Record<string, string>>({});
+  const [beian, setBeian] = useState<BeianInfo>({ icp: '', gongan: '', gonganLink: '', showGongan: false });
 
   useEffect(() => {
+    setBeian(getBeianInfo());
     fetch(`${API_BASE}/public/config`)
       .then(r => r.json()).then(data => setConfig(data || {}))
       .catch(() => {});
@@ -18,10 +49,25 @@ export function Footer() {
   return (
     <footer className="border-t border-border bg-muted/30">
       <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-12 md:py-16">
-        <div className="grid grid-cols-2 md:grid-cols-4 gap-8">
-          <div className="col-span-2 md:col-span-1">
+        <div className="grid grid-cols-2 md:grid-cols-5 gap-8">
+          <div className="col-span-2 md:col-span-2">
             <h3 className="text-lg font-bold bg-gradient-to-r from-brand-600 to-brand-400 bg-clip-text text-transparent mb-4">宇之然 AI</h3>
-            <p className="text-sm text-muted-foreground">{t.footer.tagline}</p>
+            <p className="text-sm text-muted-foreground mb-4">{t.footer.tagline}</p>
+            <div className="flex flex-wrap gap-3">
+              {qrCodes.map((qr) => (
+                <div key={qr.alt} className="text-center group">
+                  <Image
+                    src={qr.src}
+                    alt={qr.alt}
+                    width={72}
+                    height={72}
+                    className="rounded-lg bg-white transition-transform duration-200 group-hover:scale-150 group-hover:z-10 group-hover:shadow-xl cursor-pointer"
+                    unoptimized
+                  />
+                  <p className="text-xs text-muted-foreground mt-1">{qr.label}</p>
+                </div>
+              ))}
+            </div>
           </div>
           <div>
             <h4 className="text-sm font-semibold mb-3">{t.footer.explore}</h4>
@@ -53,11 +99,17 @@ export function Footer() {
         <div className="mt-10 pt-8 border-t border-border">
           <div className="flex flex-col md:flex-row items-center justify-between gap-2 text-xs text-muted-foreground">
             <p>{t.footer.copyright.replace('{year}', String(new Date().getFullYear()))}</p>
-            <p>
+            <div className="flex items-center gap-3">
               <a href="https://beian.miit.gov.cn/" target="_blank" rel="noopener noreferrer" className="hover:text-foreground transition-colors">
-                {config.icp_number ? `ICP 备案号：${config.icp_number}` : 'ICP 备案号：京ICP备XXXXXXXX号'}
+                {beian.icp}
               </a>
-            </p>
+              {beian.showGongan && (
+                <a href={beian.gonganLink} target="_blank" rel="noreferrer" className="hover:text-foreground transition-colors inline-flex items-center gap-1">
+                  <Image src="/images/beian/gongan-beian.png" alt="公安备案" width={16} height={16} unoptimized />
+                  {beian.gongan}
+                </a>
+              )}
+            </div>
           </div>
         </div>
       </div>