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/features/home/HomePage.tsx

@@ -45,7 +45,7 @@ interface HomePageProps {
   onOpenImageTool?: (tool: WebImageWorkbenchTool) => void;
 }
 
-const HOME_BACKGROUND_VIDEO = "https://stringtest.oss-cn-hangzhou.aliyuncs.com/%E6%A0%B7%E7%89%87.mp4";
+const HOME_BACKGROUND_VIDEO = "https://stringtest.oss-cn-hangzhou.aliyuncs.com/muban/hero-bg.mp4";
 
 const HOME_CAROUSEL_IMAGES = [
   { imageUrl: heroImage1, title: "灵感生成" },
@@ -196,7 +196,7 @@ function EcommerceFeatureShowcase() {
   );
 }
 
-function HomePage({ onOpenGenerate, onOpenEcommerce, onOpenScriptReview, onOpenTokenMonitor, onSelectView, onOpenImageTool }: HomePageProps) {
+function HomePage({ onOpenGenerate, onOpenCanvas, onOpenEcommerce, onOpenScriptReview, onOpenTokenMonitor, onSelectView, onOpenImageTool }: HomePageProps) {
   const [splashDismissed, setSplashDismissed] = useState(() => sessionStorage.getItem("omniai:splash-seen") === "1");
   const [activeSlideIndex, setActiveSlideIndex] = useState(0);
   const [carouselMotion, setCarouselMotion] = useState<HomeCarouselMotion | null>(null);
@@ -313,7 +313,7 @@ function HomePage({ onOpenGenerate, onOpenEcommerce, onOpenScriptReview, onOpenT
         <section className="omni-home__hero" aria-label="OmniAI 首页">
           <div className="omni-home__copy">
             <h1>OmniAI 创作中心</h1>
-            <p>从灵感、生成、画布到商业素材，所有创作入口保持在一个安静的暗绿工作台里。</p>
+            <p>从灵感到成片，一站式整合生成、AIGC与电商，让创作安静专注。</p>
           </div>
 
           <div className={`omni-home__carousel${carouselIsResetting ? " is-resetting" : ""}`} aria-label="创作案例轮播">
@@ -352,7 +352,7 @@ function HomePage({ onOpenGenerate, onOpenEcommerce, onOpenScriptReview, onOpenT
               <PlusOutlined />
               <span>新手</span>
             </button>
-            <button type="button" className="omni-home__entry omni-home__entry--primary" onClick={onOpenGenerate}>
+            <button type="button" className="omni-home__entry omni-home__entry--primary" onClick={onOpenCanvas || onOpenGenerate}>
               <PlayCircleOutlined />
               <span>老手</span>
             </button>