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

mysql/0019_project_drop_parent.sql

@@ -0,0 +1 @@
+ALTER TABLE `projects` DROP COLUMN `parent_id`;

mysql/0020_task_recovery_merge.sql

@@ -0,0 +1,125 @@
+-- 任务模型物理合并：回收成为分发任务的第二阶段（单任务双阶段）
+-- 上线前请先备份生产库；本迁移有 DELETE，回滚需依赖备份
+
+ALTER TABLE tasks ADD COLUMN recovery_enabled INTEGER NOT NULL DEFAULT 1 AFTER related_task_id;
+-- statement-breakpoint
+ALTER TABLE tasks ADD COLUMN recovery_due_at TEXT NOT NULL DEFAULT ('') AFTER recovery_enabled;
+-- statement-breakpoint
+ALTER TABLE tasks ADD COLUMN recovery_instructions TEXT NOT NULL DEFAULT ('') AFTER recovery_due_at;
+-- statement-breakpoint
+ALTER TABLE tasks ADD COLUMN recovery_example_images TEXT NOT NULL DEFAULT ('[]') AFTER recovery_instructions;
+-- statement-breakpoint
+-- 老分发任务默认关回收；下方为有伴生回收的父任务重新置 1
+UPDATE tasks SET recovery_enabled = 0 WHERE task_type = 'content_publish';
+-- statement-breakpoint
+-- 配对回收：回收字段并入父任务（说明/示例图取回收任务首条内容，截止取回收任务截止）
+UPDATE tasks parent
+JOIN tasks child ON child.related_task_id = parent.id
+JOIN (
+  SELECT task_id, body, image_assets
+  FROM contents
+  WHERE id IN (SELECT MIN(id) FROM contents GROUP BY task_id)
+) first_content ON first_content.task_id = child.id
+SET parent.recovery_due_at = child.due_at,
+    parent.recovery_instructions = first_content.body,
+    parent.recovery_example_images = first_content.image_assets,
+    parent.recovery_enabled = 1
+WHERE child.task_type = 'screenshot_collect';
+-- statement-breakpoint
+-- 配对回收：父任务无内容兜底（回收任务没有 contents 行时仍开通回收）
+UPDATE tasks parent
+JOIN tasks child ON child.related_task_id = parent.id
+SET parent.recovery_due_at = child.due_at,
+    parent.recovery_instructions = '请提交发布后的笔记截图',
+    parent.recovery_example_images = '[]',
+    parent.recovery_enabled = 1
+WHERE child.task_type = 'screenshot_collect'
+  AND parent.recovery_enabled = 0;
+-- statement-breakpoint
+-- 配对回收：截图提交记录搬到父任务同 content+partner 的分发行（父行已有提交时保留父行）
+UPDATE distributions target
+JOIN contents legacy_content ON legacy_content.id = target.content_id
+JOIN distributions legacy ON legacy.content_id = legacy_content.related_content_id
+  AND legacy.partner_id = target.partner_id
+JOIN tasks legacy_task ON legacy_task.id = legacy.task_id
+SET target.result_screenshot_key = legacy.result_screenshot_key,
+    target.result_submitted_at = legacy.result_submitted_at
+WHERE legacy_task.task_type = 'screenshot_collect'
+  AND legacy_task.related_task_id = target.task_id
+  AND target.result_submitted_at IS NULL;
+-- statement-breakpoint
+-- 配对回收：父任务里没有对应分发行时，保留为一条只挂回收字段的分发记录
+INSERT INTO distributions (id, task_id, content_id, partner_id, status, result_screenshot_key, result_submitted_at, claimed_at)
+SELECT
+  CONCAT('dist-m', LEFT(REPLACE(UUID(), '-', ''), 20)),
+  legacy_task.related_task_id,
+  legacy_content.related_content_id,
+  legacy.partner_id,
+  'claimed',
+  legacy.result_screenshot_key,
+  legacy.result_submitted_at,
+  legacy.claimed_at
+FROM distributions legacy
+JOIN contents legacy_content ON legacy_content.id = legacy.content_id
+JOIN tasks legacy_task ON legacy_task.id = legacy.task_id
+WHERE legacy_task.task_type = 'screenshot_collect'
+  AND legacy_task.related_task_id != ''
+  AND legacy_content.related_content_id != ''
+  AND NOT EXISTS (
+    SELECT 1 FROM distributions parent_dist
+    WHERE parent_dist.task_id = legacy_task.related_task_id
+      AND parent_dist.content_id = legacy_content.related_content_id
+      AND parent_dist.partner_id = legacy.partner_id
+  );
+-- statement-breakpoint
+-- 配对回收：清理伴生回收任务的分发/领取/内容/任务行
+DELETE FROM distributions
+WHERE task_id IN (SELECT id FROM (SELECT id FROM tasks WHERE task_type = 'screenshot_collect' AND related_task_id != '') AS doomed);
+-- statement-breakpoint
+DELETE FROM claims
+WHERE task_id IN (SELECT id FROM (SELECT id FROM tasks WHERE task_type = 'screenshot_collect' AND related_task_id != '') AS doomed);
+-- statement-breakpoint
+DELETE FROM contents
+WHERE task_id IN (SELECT id FROM (SELECT id FROM tasks WHERE task_type = 'screenshot_collect' AND related_task_id != '') AS doomed);
+-- statement-breakpoint
+DELETE FROM tasks WHERE task_type = 'screenshot_collect' AND related_task_id != '';
+-- statement-breakpoint
+-- 独立回收（无关联分发）：无领取记录的直接删除
+DELETE FROM contents
+WHERE task_id IN (
+  SELECT id FROM (
+    SELECT t.id FROM tasks t
+    WHERE t.task_type = 'screenshot_collect'
+      AND (t.related_task_id IS NULL OR t.related_task_id = '')
+      AND NOT EXISTS (SELECT 1 FROM distributions d WHERE d.task_id = t.id)
+  ) AS doomed
+);
+-- statement-breakpoint
+DELETE FROM tasks
+WHERE task_type = 'screenshot_collect'
+  AND (related_task_id IS NULL OR related_task_id = '')
+  AND id NOT IN (SELECT DISTINCT task_id FROM distributions);
+-- statement-breakpoint
+-- 独立回收（有领取记录）：原地转正为单模型任务（发布阶段字段留空，仅存历史数据）
+UPDATE tasks standalone
+JOIN (
+  SELECT task_id, body, image_assets
+  FROM contents
+  WHERE id IN (SELECT MIN(id) FROM contents GROUP BY task_id)
+) first_content ON first_content.task_id = standalone.id
+SET standalone.task_type = 'content_publish',
+    standalone.recovery_due_at = standalone.due_at,
+    standalone.recovery_instructions = first_content.body,
+    standalone.recovery_example_images = first_content.image_assets,
+    standalone.recovery_enabled = 1
+WHERE standalone.task_type = 'screenshot_collect';
+-- statement-breakpoint
+UPDATE tasks standalone
+SET standalone.task_type = 'content_publish',
+    standalone.recovery_due_at = standalone.due_at,
+    standalone.recovery_instructions = '请提交发布后的笔记截图',
+    standalone.recovery_example_images = '[]',
+    standalone.recovery_enabled = 1
+WHERE standalone.task_type = 'screenshot_collect';
+-- statement-breakpoint
+UPDATE contents SET related_content_id = '' WHERE related_content_id IS NOT NULL AND related_content_id != '';