revert(protosearch): drop multiselect custom_values shim

Author: adubovikov

src/app/components/widgets/protosearch-widget/protosearch-widget.component.ts

@@ -47,8 +47,6 @@ interface SearchFieldItem {
   selector?: Array<any>;
   type: string;
   value?: string;
-  /** Copied from mapping fields_mapping when present (multiselect + free-text). */
-  custom_values?: boolean;
 }
 
 @Component({
@@ -677,14 +675,6 @@ export class ProtosearchWidgetComponent implements IWidget, OnInit, OnDestroy, A
 
       return 'input-multi-select-with-chips';
     }
-    // multiselect in mapping + custom_values → same chip UI as input_multi_select (mat-select multiple has no custom tag).
-    if (
-      item.form_type === 'multiselect' &&
-      item.form_default &&
-      (item.custom_values || item.__mapping?.custom_values)
-    ) {
-      return 'input-multi-select-with-chips';
-    }
     if (item.type === 'array_string' && !this.isMulti(item.field_name) && !this.isAliasField(item.field_name)) {
       return 'chip-list-array-string';
     }
@@ -761,12 +751,6 @@ export class ProtosearchWidgetComponent implements IWidget, OnInit, OnDestroy, A
 
         i.__mapping = f;
 
-        if (f && 'custom_values' in f) {
-          i.custom_values = !!(f as { custom_values?: boolean }).custom_values;
-        } else {
-          delete i.custom_values;
-        }
-
         if (f?.type) {
           i.type = f.type;
         }

src/app/models/preference-mapping-field.model.ts

@@ -31,6 +31,4 @@ export interface PreferenceMappingFieldModel {
     vdata?:string;
     grid?:string;
     transform?:string;
-    /** When form_type is multiselect, use chip widget with free-text entries (Homer UI). */
-    custom_values?: boolean;
 }