feat: 添加移动端适配和测试功能

refactor(layout): 优化页脚布局和备案信息展示
feat(constants): 添加ICP备案和公安备案信息
feat(header): 实现移动端加载时的骨架屏效果
style(globals): 调整文字颜色和添加移动端响应样式
feat(breadcrumb): 增加返回按钮和响应式优化
feat(e2e): 添加移动端测试工具和测试用例
docs: 添加页脚重设计文档

src/components/layout/footer.tsx

@@ -22,6 +22,20 @@ export function Footer() {
             <p className="text-[#5C5C5C] text-sm leading-relaxed mb-6">
               {COMPANY_INFO.description}
             </p>
+            <div className="mt-6 pt-6 border-t border-[#E5E5E5]">
+              <p className="text-sm text-[#5C5C5C] mb-3 font-medium">关注公众号</p>
+              <div className="inline-block bg-white p-3 rounded-lg border border-[#E5E5E5] shadow-sm hover:shadow-md transition-shadow duration-200">
+                <Image 
+                  src="/images/qrcode_for_gh_a297181ff548_258.jpg" 
+                  alt="微信公众号二维码" 
+                  width={120}
+                  height={120}
+                  className="w-[120px] h-[120px]"
+                  loading="lazy"
+                />
+              </div>
+              <p className="text-xs text-[#718096] mt-2">扫码关注获取最新资讯</p>
+            </div>
           </div>
 
           <div>
@@ -99,6 +113,28 @@ export function Footer() {
               </Link>
             </div>
           </div>
+          
+          <div className="text-center mt-4 pt-4 border-t border-[#E5E5E5]">
+            <div className="flex flex-col sm:flex-row justify-center items-center gap-2 sm:gap-4 text-xs text-[#718096]">
+              <a 
+                href="https://beian.miit.gov.cn/" 
+                target="_blank" 
+                rel="noopener noreferrer"
+                className="hover:text-[#C41E3A] transition-colors"
+              >
+                {COMPANY_INFO.icp}
+              </a>
+              <span className="hidden sm:inline">|</span>
+              <a 
+                href="http://www.beian.gov.cn/" 
+                target="_blank" 
+                rel="noopener noreferrer"
+                className="hover:text-[#C41E3A] transition-colors"
+              >
+                {COMPANY_INFO.police}
+              </a>
+            </div>
+          </div>
         </div>
       </div>
     </footer>