后端：资料距离、语音图片会员限制、免短信注册、AI 托管回复修复

- 单用户资料接口补上距离：此前只有推荐/附近列表会算距离，资料页和
  聊天头部因此无内容可显示。沿用同一套 haversine 与隐私开关。
- 语音/图片消息可限定会员发送，两个开关在管理端「运营配置」中修改
  （迁移 032）。校验放在 persistMessageContext，HTTP 与 WebSocket
  两条发送路径都覆盖；文本消息永不受限。
- 短信服务关闭时注册不再要求验证码：关掉之后没人能拿到验证码，继续
  要求就等于关闭注册通道。重置密码不做同样放宽，那里缺验证码等于
  凭手机号夺号。app/config 增加 smsVerification 供客户端决定表单形态。
- 修复 AI 托管账号之间不回复：原规则按「发送方是否托管账号」拦截，
  把真人操作测试号的正常对话也挡了。改为标记 worker 自己写入的回复，
  只对 AI 生成的消息跳过入队。
- ai.default_model_id 同时接受模型 ID 与名称，填名称时不再被 MySQL
  静默转成 0 而使配置失效。
- 聊天媒体留存管理与清理任务（迁移 033，两台线上均已应用）。

新增集成测试均针对真实 MySQL：会员限制、免短信注册、AI 入队规则、
默认模型解析、资料距离。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

im/backend/internal/app/admin_commerce_messages.go

@@ -189,14 +189,14 @@ func (a *App) adminMessages(w http.ResponseWriter, r *http.Request) {
 		like := "%" + keyword + "%"
 		args = append(args, like, like, like, like, like, like)
 	}
-	base := ` FROM im_messages m JOIN users su ON su.id=m.sender_id JOIN user_profiles sp ON sp.user_id=m.sender_id`
+	base := ` FROM im_messages m JOIN users su ON su.id=m.sender_id JOIN user_profiles sp ON sp.user_id=m.sender_id LEFT JOIN im_message_media mm ON mm.message_id=m.id`
 	var total int64
 	if err := a.db.QueryRowContext(r.Context(), `SELECT COUNT(*)`+base+where, args...).Scan(&total); err != nil {
 		fail(w, http.StatusInternalServerError, 50001, "查询消息记录失败")
 		return
 	}
 	queryArgs := append(append([]any{}, args...), size, offset)
-	rows, err := a.db.QueryContext(r.Context(), `SELECT m.id,m.conversation_id,m.seq,m.sender_id,su.public_id,sp.nickname,sp.avatar_url,m.client_msg_id,m.message_type,m.body,m.moderation_status,m.recalled_at,m.admin_removed_at,m.admin_removed_by,m.admin_remove_reason,m.created_at,COALESCE((SELECT GROUP_CONCAT(CONCAT(kp.nickname,' (',ku.public_id,')') ORDER BY kp.nickname SEPARATOR '、') FROM im_conversation_members kcm JOIN users ku ON ku.id=kcm.user_id JOIN user_profiles kp ON kp.user_id=kcm.user_id WHERE kcm.conversation_id=m.conversation_id AND kcm.user_id<>m.sender_id),'')`+base+where+` ORDER BY m.created_at DESC,m.id DESC LIMIT ? OFFSET ?`, queryArgs...)
+	rows, err := a.db.QueryContext(r.Context(), `SELECT m.id,m.conversation_id,m.seq,m.sender_id,su.public_id,sp.nickname,sp.avatar_url,m.client_msg_id,m.message_type,m.body,m.moderation_status,m.recalled_at,m.admin_removed_at,m.admin_removed_by,m.admin_remove_reason,m.created_at,COALESCE(mm.status,-1),mm.deleted_at,COALESCE(mm.delete_reason,''),COALESCE(mm.cleanup_error,''),COALESCE((SELECT GROUP_CONCAT(CONCAT(kp.nickname,' (',ku.public_id,')') ORDER BY kp.nickname SEPARATOR '、') FROM im_conversation_members kcm JOIN users ku ON ku.id=kcm.user_id JOIN user_profiles kp ON kp.user_id=kcm.user_id WHERE kcm.conversation_id=m.conversation_id AND kcm.user_id<>m.sender_id),'')`+base+where+` ORDER BY m.created_at DESC,m.id DESC LIMIT ? OFFSET ?`, queryArgs...)
 	if err != nil {
 		fail(w, http.StatusInternalServerError, 50001, "查询消息记录失败")
 		return
@@ -208,17 +208,19 @@ func (a *App) adminMessages(w http.ResponseWriter, r *http.Request) {
 		var publicID, nickname, avatar, clientMsgID, recipients, adminRemoveReason string
 		var typ, moderation int
 		var body []byte
-		var recalledAt, adminRemovedAt sql.NullTime
+		var recalledAt, adminRemovedAt, mediaDeletedAt sql.NullTime
 		var adminRemovedBy sql.NullInt64
+		var mediaStatus int
+		var mediaDeleteReason, mediaCleanupError string
 		var createdAt time.Time
-		if rows.Scan(&id, &convID, &seq, &senderID, &publicID, &nickname, &avatar, &clientMsgID, &typ, &body, &moderation, &recalledAt, &adminRemovedAt, &adminRemovedBy, &adminRemoveReason, &createdAt, &recipients) != nil {
+		if rows.Scan(&id, &convID, &seq, &senderID, &publicID, &nickname, &avatar, &clientMsgID, &typ, &body, &moderation, &recalledAt, &adminRemovedAt, &adminRemovedBy, &adminRemoveReason, &createdAt, &mediaStatus, &mediaDeletedAt, &mediaDeleteReason, &mediaCleanupError, &recipients) != nil {
 			continue
 		}
 		var content any
 		if json.Unmarshal(body, &content) != nil {
 			content = string(body)
 		}
-		items = append(items, map[string]any{"id": id, "conversationId": convID, "seq": seq, "senderId": senderID, "senderPublicId": publicID, "senderNickname": nickname, "senderAvatar": avatar, "recipients": recipients, "clientMsgId": clientMsgID, "type": typ, "content": content, "moderationStatus": moderation, "recalledAt": nullableTime(recalledAt), "adminRemovedAt": nullableTime(adminRemovedAt), "adminRemovedBy": nullableInt64(adminRemovedBy), "adminRemoveReason": adminRemoveReason, "createdAt": createdAt})
+		items = append(items, map[string]any{"id": id, "conversationId": convID, "seq": seq, "senderId": senderID, "senderPublicId": publicID, "senderNickname": nickname, "senderAvatar": avatar, "recipients": recipients, "clientMsgId": clientMsgID, "type": typ, "content": content, "moderationStatus": moderation, "recalledAt": nullableTime(recalledAt), "adminRemovedAt": nullableTime(adminRemovedAt), "adminRemovedBy": nullableInt64(adminRemovedBy), "adminRemoveReason": adminRemoveReason, "createdAt": createdAt, "chatMedia": typ == 2 || typ == 3, "mediaStatus": mediaStatus, "mediaDeletedAt": nullableTime(mediaDeletedAt), "mediaDeleteReason": mediaDeleteReason, "mediaCleanupError": mediaCleanupError})
 	}
 	reply(w, pageResult{Items: items, Total: total, Page: page, Size: size})
 }