fix: stringify im admin json fields

server/internal/logic/sys/im_admin_query_client.go

@@ -120,9 +120,8 @@ func normalizeImAdminRow(row map[string]any, aliases map[string]string) {
 }
 
 func normalizeImAdminValue(target string, value any) any {
-	if target != "credentials" {
-		return value
-	}
+	switch target {
+	case "credentials":
 		items, ok := value.([]any)
 		if !ok {
 			return value
@@ -151,6 +150,26 @@ func normalizeImAdminValue(target string, value any) any {
 			parts = append(parts, text)
 		}
 		return strings.Join(parts, ", ")
+	case "profileJson", "trustedJson", "accessJson":
+		return normalizeImAdminJSONString(value)
+	default:
+		return value
+	}
+}
+
+func normalizeImAdminJSONString(value any) string {
+	switch v := value.(type) {
+	case nil:
+		return ""
+	case string:
+		return v
+	default:
+		encoded, err := json.Marshal(v)
+		if err != nil {
+			return ""
+		}
+		return string(encoded)
+	}
 }
 
 func snakeToLowerCamel(s string) string {