fix: fixed saving of user profile changes

Author: ludomikula

server/api-service/lowcoder-domain/src/main/java/org/lowcoder/domain/user/model/User.java

@@ -1,18 +1,13 @@
 package org.lowcoder.domain.user.model;
 
-import static com.google.common.base.Suppliers.memoize;
-import static org.lowcoder.infra.util.AssetUtils.toAssetPath;
-
-import java.time.Instant;
-import java.util.*;
-import java.util.function.Supplier;
-
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.type.TypeReference;
 import lombok.*;
 import lombok.experimental.SuperBuilder;
 import lombok.extern.jackson.Jacksonized;
 import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.collections4.ListUtils;
 import org.apache.commons.collections4.SetUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.lowcoder.domain.mongodb.AfterMongodbRead;
@@ -25,9 +20,12 @@
 import org.springframework.data.annotation.Transient;
 import org.springframework.data.mongodb.core.mapping.Document;
 
-import com.fasterxml.jackson.annotation.JsonIgnore;
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-import com.fasterxml.jackson.annotation.JsonProperty;
+import java.time.Instant;
+import java.util.*;
+import java.util.function.Supplier;
+
+import static com.google.common.base.Suppliers.memoize;
+import static org.lowcoder.infra.util.AssetUtils.toAssetPath;
 
 
 @Getter
@@ -44,8 +42,7 @@ public class User extends HasIdAndAuditing implements BeforeMongodbWrite, AfterM
 
     private String name;
 
-    @Builder.Default
-    private String uiLanguage = UiConstants.DEFAULT_UI_LANGUAGE;
+    private String uiLanguage;
 
     private String avatar;
 
@@ -159,5 +156,10 @@ public void afterMongodbRead(MongodbInterceptorContext context) {
             }, new ArrayList<>());
             this.apiKeysList.forEach(authConfig -> authConfig.doDecrypt(s -> context.encryptionService().decryptString(s)));
         }
+
+        /** set UI language to default one if it's null **/
+        if (StringUtils.isBlank(this.uiLanguage)) {
+            this.uiLanguage = UiConstants.DEFAULT_UI_LANGUAGE;
+        }
     }
 }