fix: 设备组详情补充 auth_type/device_type 字段，统一用户名显示

- FamilyMemberItem 新增 auth_type、device_type 字段
- FamilySummary 新增 owner_auth_type 字段
- findUserIdentifiers 返回 identifierInfo（含 auth_type）
- 新增 parseDeviceType() 从 UserAgent 解析设备类型

Co-Authored-By: claude-flow <ruv@ruv.net>

internal/logic/admin/user/familyCommon.go

@@ -53,8 +53,13 @@ func normalizeFamilyStatusInput(status string) (uint8, bool) {
 	}
 }
 
-func findUserIdentifiers(ctx context.Context, db *gorm.DB, userIDs []int64) (map[int64]string, error) {
-	identifierMap := make(map[int64]string)
+type identifierInfo struct {
+	Identifier string
+	AuthType   string
+}
+
+func findUserIdentifiers(ctx context.Context, db *gorm.DB, userIDs []int64) (map[int64]identifierInfo, error) {
+	identifierMap := make(map[int64]identifierInfo)
 	if len(userIDs) == 0 {
 		return identifierMap, nil
 	}
@@ -92,8 +97,31 @@ func findUserIdentifiers(ctx context.Context, db *gorm.DB, userIDs []int64) (map
 			continue
 		}
 		selectedPriority[row.UserId] = currentPriority
-		identifierMap[row.UserId] = row.AuthIdentifier
+		identifierMap[row.UserId] = identifierInfo{
+			Identifier: row.AuthIdentifier,
+			AuthType:   row.AuthType,
+		}
 	}
 
 	return identifierMap, nil
 }
+
+func parseDeviceType(userAgent string) string {
+	ua := strings.ToLower(userAgent)
+	switch {
+	case strings.Contains(ua, "iphone"):
+		return "iPhone"
+	case strings.Contains(ua, "ipad"):
+		return "iPad"
+	case strings.Contains(ua, "android"):
+		return "Android"
+	case strings.Contains(ua, "windows"):
+		return "Windows"
+	case strings.Contains(ua, "macintosh"), strings.Contains(ua, "mac os"):
+		return "Mac"
+	case strings.Contains(ua, "linux"):
+		return "Linux"
+	default:
+		return ""
+	}
+}