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

tests/owner-permissions.test.mjs

@@ -78,7 +78,7 @@ test("project-owner management actions gate on project ownership", () => {
     "project_delete",
     "project_ensure_main_chat",
     "create_task",
-    "create_screenshot_task",
+    "task_enable_recovery",
   ]) {
     const body = section(actionRoute, action);
     assert.match(
@@ -319,7 +319,7 @@ test("project detail exposes inline main-chat member management", () => {
   assert.match(globalsCss, /\.project-member-remove/);
 });
 
-test("every project_save payload carries parentProjectId（改总群成员不得清空层级）", () => {
+test("no project_save payload carries parentProjectId（项目层级已移除）", () => {
   const adminApp = readFileSync(
     new URL("../app/admin-app.tsx", import.meta.url),
     "utf8",
@@ -330,10 +330,9 @@ test("every project_save payload carries parentProjectId（改总群成员不得
   assert.ok(starts.length >= 2, "至少应有两处 project_save 调用（编辑器/总群成员）");
   for (const start of starts) {
     const payload = adminApp.slice(start, start + 600);
-    assert.match(
-      payload,
-      /parentProjectId/,
-      "project_save 载荷缺 parentProjectId，会把 parent_id 重置为空",
+    assert.ok(
+      !/parentProjectId/.test(payload),
+      "project_save 载荷不应再带 parentProjectId（项目层级已移除）",
     );
   }
 });