feat: 完善淘宝小程序拍照、报告与登录流程

接入本地实时识别和自动三连拍，调整报告裁切、商品跳转、分享标题及居中页眉；完善游客会话、后台渠道隔离、部署脚本与回归测试。

taobao/app.acss

@@ -10,6 +10,11 @@ page {
   -webkit-font-smoothing: antialiased;
 }
 
+/* Center against the full screen, independently of native left/right buttons. */
+.brand-header { position:fixed; left:0; top:0; width:100%; box-sizing:border-box; background:#FFFFFF; color:#282828; z-index:70; pointer-events:none; }
+.brand-header-line { position:relative; width:100%; display:flex; align-items:center; justify-content:center; }
+.brand-header-title { display:block; width:calc(100% - 152px); text-align:center; font-size:15px; font-weight:500; line-height:22px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
+
 /* ─── 主按钮：长方形 + 小倒角（H5 设计稿 181×37，圆角 5） ─── */
 .btn-primary {
   display: flex;