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/image-workbench/ImageWorkbenchPage.tsx

@@ -27,6 +27,7 @@ import { useCallback, useEffect, useRef, useState } from "react";
 import type { WebImageWorkbenchTool, WebViewKey } from "../../types";
 import { aiGenerationClient } from "../../api/aiGenerationClient";
 import { waitForTask } from "../../api/taskSubscription";
+import { saveToolTaskState, loadToolTaskState, clearToolTaskState } from "../workbench/toolKeepalive";
 import { translateTaskError } from "../../utils/translateTaskError";
 import { addToolResultToAssetLibrary, saveToolResultToLocal } from "../workbench/toolResultActions";
 import { useCanvasDrawing } from "./useCanvasDrawing";
@@ -139,13 +140,39 @@ function ImageWorkbenchPage({ initialTool = "workbench", onOpenMore, onSelectVie
   const [generationError, setGenerationError] = useState<string | null>(null);
   const abortRef = useRef(false);
   const taskIdRef = useRef<string | null>(null);
+  const keepaliveRestoredRef = useRef(false);
+
+  // Keep-alive: restore saved task on mount
+  useEffect(() => {
+    if (keepaliveRestoredRef.current) return;
+    keepaliveRestoredRef.current = true;
+    const saved = loadToolTaskState("imagewb");
+    if (!saved || saved.resultUrl) return;
+    setIsGenerating(true);
+    abortRef.current = false;
+    taskIdRef.current = saved.taskId;
+    void waitForTask(saved.taskId, {
+      onProgress: (e) => {
+        setTaskProgress(Math.max(0, Math.min(100, Math.trunc(e.progress || 0))));
+        setStatus(`${e.status} / ${e.progress}%`);
+        if (e.status === "completed" && e.resultUrl) {
+          setResultImages([e.resultUrl]);
+          clearToolTaskState("imagewb");
+          setIsGenerating(false);
+          setStatus("恢复任务完成");
+        }
+        if (e.status === "failed") {
+          clearToolTaskState("imagewb");
+          setIsGenerating(false);
+          setStatus("恢复任务失败");
+        }
+      },
+    });
+  }, []);
 
   useEffect(() => {
     return () => {
       abortRef.current = true;
-      if (taskIdRef.current) {
-        aiGenerationClient.cancelTask(taskIdRef.current).catch(() => {});
-      }
     };
   }, []);
 
@@ -155,6 +182,7 @@ function ImageWorkbenchPage({ initialTool = "workbench", onOpenMore, onSelectVie
       aiGenerationClient.cancelTask(taskIdRef.current).catch(() => {});
       taskIdRef.current = null;
     }
+    clearToolTaskState("imagewb");
     setGenerating(false);
     setGenerationProgress(0);
     setStatus("已取消");
@@ -305,6 +333,7 @@ function ImageWorkbenchPage({ initialTool = "workbench", onOpenMore, onSelectVie
         referenceUrls: refUrls,
       });
       taskIdRef.current = taskId;
+      saveToolTaskState("imagewb", { taskId, status: "running", progress: 0 });
 
       const tempUrl = await pollTaskUntilDone(taskId);
       if (tempUrl) {
@@ -385,6 +414,7 @@ function ImageWorkbenchPage({ initialTool = "workbench", onOpenMore, onSelectVie
         referenceUrls: refUrls,
       });
       taskIdRef.current = taskId;
+      saveToolTaskState("imagewb", { taskId, status: "running", progress: 0 });
 
       const tempUrl = await pollTaskUntilDone(taskId);
       if (tempUrl) {
@@ -530,6 +560,7 @@ function ImageWorkbenchPage({ initialTool = "workbench", onOpenMore, onSelectVie
           referenceUrls: refUrls,
         });
         taskIdRef.current = taskId;
+      saveToolTaskState("imagewb", { taskId, status: "running", progress: 0 });
 
         const tempUrl = await pollTaskUntilDone(taskId);
         if (tempUrl) {
@@ -544,6 +575,10 @@ function ImageWorkbenchPage({ initialTool = "workbench", onOpenMore, onSelectVie
       }
 
       setResultImages(results);
+      clearToolTaskState("imagewb");
+      if (results.length) {
+        saveToolTaskState("imagewb", { taskId: taskIdRef.current || "", resultUrl: results[0], status: "完成", progress: 100 });
+      }
       setStatus(results.length ? `生成完成，共 ${results.length} 张` : "生成已取消");
     } catch (err) {
       const msg = err instanceof Error ? err.message : "生成失败";