优化发布群租客清退与历史消息

backend/migrations/000011_chat_support_groups.sql

@@ -54,6 +54,11 @@ WHERE g.code IN ('owner_onboarding', 'renter_handoff')
   AND r.code = 'cs'
   AND au.status = 'active';
 
+INSERT INTO system_configs (`key`, `value`, description) VALUES
+('chat.renter_retention_days_after_order_end', '5', '订单结束后租客保留在发布群的天数（3-7）')
+ON DUPLICATE KEY UPDATE
+  description = VALUES(description);
+
 -- +goose StatementEnd
 
 -- +goose Down
@@ -65,5 +70,6 @@ DELETE rp FROM role_permissions rp
 JOIN permissions p ON p.id = rp.permission_id
 WHERE p.code = 'chat:manage';
 DELETE FROM permissions WHERE code = 'chat:manage';
+DELETE FROM system_configs WHERE `key` = 'chat.renter_retention_days_after_order_end';
 
 -- +goose StatementEnd