feat: 任务模型物理合并，发布+回收并为单任务双阶段

- tasks 新增 recovery_enabled/recovery_due_at/recovery_instructions/recovery_example_images，回收挂自己名下（先发布后交截图），不再置 complete
- 存量 screenshot_collect 迁移并入父任务后删除（mysql/0020 含 DELETE，生产执行前务必备份）
- 新 action task_enable_recovery：ghost 面板一键开通回收，截止默认=发布截止
- 企微催办双阶段（待发布/截图待提交）；超期自动释放仅发布阶段
- admin 删 groupTaskMasters 聚合改单卡双面板；portal 详情页回收截图区块+批次回收进度
- 测试 309 全绿 + Playwright E2E 20/20

app/api/screenshot-task-export/route.ts

@@ -29,11 +29,11 @@ export async function GET(request: Request) {
       return ownerForbidden();
     }
     const task = await getRawDb()
-      .prepare("SELECT name, task_type FROM tasks WHERE id = ?")
+      .prepare("SELECT name FROM tasks WHERE id = ?")
       .bind(taskId)
-      .first<{ name: string; task_type: string }>();
-    if (!task || task.task_type !== "screenshot_collect") {
-      return Response.json({ error: "没有找到截图回收任务" }, { status: 404 });
+      .first<{ name: string }>();
+    if (!task) {
+      return Response.json({ error: "没有找到任务" }, { status: 404 });
     }
     const rows = await getRawDb()
       .prepare(
@@ -60,7 +60,7 @@ export async function GET(request: Request) {
       }>();
     const files: Record<string, Uint8Array> = {};
     const manifest = [
-      ["序号", "搜索关键词", "领取人", "领取时间", "提交时间", "文件名"],
+      ["序号", "笔记标题", "领取人", "领取时间", "提交时间", "文件名"],
     ];
     let exported = 0;
     for (const [rowIndex, row] of rows.results.entries()) {