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

lib/mvp-db.ts

@@ -871,21 +871,12 @@ export async function getDashboardData(ownerUserid?: string) {
             (SELECT c.body FROM contents c WHERE c.task_id = t.id ORDER BY c.source_row LIMIT 1) AS instructions,
             (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.id) AS dist_total,
             (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.id AND d.status = 'complete') AS dist_complete,
-            (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.id AND d.result_submitted_at IS NOT NULL) AS dist_submitted,
-            (SELECT rt.name FROM tasks rt WHERE rt.id = t.related_task_id) AS related_task_name,
-            (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.related_task_id) AS related_dist_total,
-            (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.related_task_id AND d.status = 'complete') AS related_dist_complete,
-            (SELECT rt2.id FROM tasks rt2 WHERE rt2.related_task_id = t.id LIMIT 1) AS reverse_related_task_id,
-            (SELECT rt2.name FROM tasks rt2 WHERE rt2.related_task_id = t.id LIMIT 1) AS reverse_related_task_name,
-            (SELECT COUNT(*) FROM distributions d WHERE d.task_id = (SELECT rt2.id FROM tasks rt2 WHERE rt2.related_task_id = t.id LIMIT 1)) AS reverse_dist_total,
-            (SELECT COUNT(*) FROM distributions d WHERE d.task_id = (SELECT rt2.id FROM tasks rt2 WHERE rt2.related_task_id = t.id LIMIT 1) AND d.result_submitted_at IS NOT NULL) AS reverse_dist_submitted
+            (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.id AND d.result_submitted_at IS NOT NULL) AS dist_submitted
            FROM tasks t
            LEFT JOIN projects pj ON pj.id = t.project_id`;
   const distributionsBase = `SELECT
             d.*,
             c.title AS content_title,
-            c.related_content_id AS related_content_id,
-            rc.title AS related_content_title,
             p.name AS partner_name,
             cl.claimant_name AS claimant_name,
             a.nickname AS account_nickname,
@@ -898,7 +889,6 @@ export async function getDashboardData(ownerUserid?: string) {
             t.due_at AS due_at
           FROM distributions d
           JOIN contents c ON c.id = d.content_id
-          LEFT JOIN contents rc ON rc.id = c.related_content_id
           JOIN partners p ON p.id = d.partner_id
           LEFT JOIN claims cl ON cl.id = d.claim_id
           JOIN tasks t ON t.id = d.task_id