perf(*): 创作工作台 - 优化首页按需加载与画布交互并修复历史迁移冲突

web/src/services/api/task-center.ts

@@ -53,6 +53,7 @@ export type GenerationTask = {
     receiptRecorded?: boolean;
     previewUrl?: string;
     previewKind?: "image" | "video";
+    previewPosterUrl?: string;
     inputJson?: string;
     resultJson?: string;
     resultState?: GenerationTaskResultState;