WIP - do not display id on list views and correctly format datetime fields

backend/src/object/field-mapper.service.ts

@@ -79,6 +79,10 @@ export class FieldMapperService {
     const frontendType = this.mapFieldType(field.type);
     const isLookupField = frontendType === 'belongsTo' || field.type.toLowerCase().includes('lookup');
     
+    // Hide 'id' field from list view by default
+    const isIdField = field.apiName === 'id';
+    const defaultShowOnList = isIdField ? false : true;
+    
     return {
       id: field.id,
       apiName: field.apiName,
@@ -95,7 +99,7 @@ export class FieldMapperService {
       isReadOnly: field.isSystem || uiMetadata.isReadOnly || false,
       
       // View visibility
-      showOnList: uiMetadata.showOnList !== false,
+      showOnList: uiMetadata.showOnList !== undefined ? uiMetadata.showOnList : defaultShowOnList,
       showOnDetail: uiMetadata.showOnDetail !== false,
       showOnEdit: uiMetadata.showOnEdit !== false && !field.isSystem,
       sortable: uiMetadata.sortable !== false,
@@ -141,6 +145,7 @@ export class FieldMapperService {
       'boolean': 'boolean',
       'date': 'date',
       'datetime': 'datetime',
+      'date_time': 'datetime',
       'time': 'time',
       'email': 'email',
       'url': 'url',