fix: 全站页面保活机制、登录拦截优化、UI修复与功能完善

- 移除未登录全页面拦截，改为浏览自由 + 功能使用时弹窗
- 修复PageTransition退出动画卡死导致黑屏的bug
- CanvasPage添加加载中状态避免首次访问黑屏假死
- 全站7个工具页添加页面保活机制，切页后台任务不中断
- 修复未登录时401误触发"用户已在别处登录"弹窗
- 删除MorePage模板板块、微信登录、EcommerceTemplates/SizeTemplate路由
- 剧本评分接入DashScope qwen3.7-max直连API
- 电商视频生成重构为3阶段可视管线（策划→生成图片→生成视频）
- 电商视频保活增强：异步函数直接写localStorage避免卸载丢失
- Workbench侧边栏移除mode过滤，三模式共用同一对话列表
- 首页更新轮播图/背景视频、按钮跳转修正、文案优化
- AppShell顶栏新增网站备案信息按钮
- 多个页面的terminate/cancel按钮覆盖、单镜头重试、批量保存下载

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

src/components/AppShell.tsx

@@ -3,8 +3,12 @@ import {
   ArrowUpOutlined,
   CheckCircleOutlined,
   FlagOutlined,
+  InfoCircleOutlined,
   LoginOutlined,
   LogoutOutlined,
+  PhoneOutlined,
+  SafetyOutlined,
+  EnvironmentOutlined,
   PlusCircleOutlined,
   UserOutlined,
   WalletOutlined,
@@ -61,6 +65,8 @@ function AppShell({
   const submenuHideTimerRef = useRef<number | null>(null);
   const [profileOpen, setProfileOpen] = useState(false);
   const [rechargeOpen, setRechargeOpen] = useState(false);
+  const [infoOpen, setInfoOpen] = useState(false);
+  const infoRef = useRef<HTMLDivElement>(null);
   const [openSubmenuKey, setOpenSubmenuKey] = useState<WebViewKey | null>(null);
   const prevActiveViewRef = useRef<WebViewKey>(activeView);
   const [navJustActivated, setNavJustActivated] = useState<WebViewKey | null>(null);
@@ -140,6 +146,17 @@ function AppShell({
     return () => document.removeEventListener("pointerdown", handlePointerDown);
   }, [profileOpen]);
 
+  useEffect(() => {
+    if (!infoOpen) return;
+    const handleInfoOutside = (event: PointerEvent) => {
+      if (!infoRef.current?.contains(event.target as Node)) {
+        setInfoOpen(false);
+      }
+    };
+    document.addEventListener("pointerdown", handleInfoOutside);
+    return () => document.removeEventListener("pointerdown", handleInfoOutside);
+  }, [infoOpen]);
+
   useEffect(() => {
     if (!session) {
       setProfileOpen(false);
@@ -307,6 +324,30 @@ function AppShell({
                   onMarkAllRead={onMarkAllNotificationsRead}
                 />
               )}
+              <div className="info-popover-anchor" ref={infoRef}>
+                <button
+                  className="info-button"
+                  type="button"
+                  aria-label="网站信息"
+                  onClick={() => setInfoOpen((c) => !c)}
+                >
+                  <InfoCircleOutlined />
+                </button>
+                <AnimatedPanel open={infoOpen} className="info-popover panel-surface">
+                  <dl>
+                    <dt>备案信息</dt>
+                    <dd>苏ICP备2026021747号-1</dd>
+                    <dt>公司地址</dt>
+                    <dd>江苏省南京市江北新区扬子江数字视听产业园9栋A楼501</dd>
+                    <dt>联系电话</dt>
+                    <dd>15155073618</dd>
+                  </dl>
+                  <div className="info-popover__links">
+                    <a href="#" onClick={(e) => { e.preventDefault(); setInfoOpen(false); }}>用户协议</a>
+                    <a href="#" onClick={(e) => { e.preventDefault(); setInfoOpen(false); }}>隐私政策</a>
+                  </div>
+                </AnimatedPanel>
+              </div>
               <button
                 className="member-button"
                 type="button"