fix(search-filter): cast types due to gn-ui typing issues

this commit should be reverted and the any typings removed once the issues are fixed upstream

apps/datahub/src/app/search/search-filters/dropdown-select/dropdown-select.component.ts

@@ -1,11 +1,6 @@
-import {
-  ChangeDetectionStrategy,
-  Component,
-  EventEmitter,
-  Input,
-  Output,
-} from '@angular/core'
+import { ChangeDetectionStrategy, Component, Input } from '@angular/core'
 import { Choice, DropdownMultiselectComponent } from 'geonetwork-ui'
+import { FieldValue } from 'geonetwork-ui/libs/feature/search/src/lib/utils/service/fields'
 
 @Component({
   selector: 'mel-datahub-dropdown-select',
@@ -14,9 +9,10 @@ import { Choice, DropdownMultiselectComponent } from 'geonetwork-ui'
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class DropdownSelectComponent extends DropdownMultiselectComponent {
-  //FIXME: overrides and casting via method due to typing issues with gn-ui
-  @Input() override selected: any
-  @Output() override selectValues = new EventEmitter<any>()
+  //FIXME: castings due to typing issues with gn-ui
+  @Input() set selectedValue(value: FieldValue | FieldValue[]) {
+    this.selected = value as unknown[]
+  }
 
   selectFromEvent(choice: Choice, event: Event) {
     this.select(choice, (event.target as HTMLInputElement).checked)

apps/datahub/src/app/search/search-filters/search-filter-dropdown/search-filter-dropdown.component.html

@@ -3,9 +3,9 @@
   [title]="title"
   [maxRows]="6"
   [choices]="choices$ | async"
-  [selected]="selected$ | async"
+  [selectedValue]="selected$ | async"
   [allowSearch]="true"
-  (selectValues)="onSelectedValues($event)"
+  (selectValues)="onSelectedValuesWithCast($event)"
   [attr.data-cy-field]="fieldName"
 >
 </mel-datahub-dropdown-select>

apps/datahub/src/app/search/search-filters/search-filter-dropdown/search-filter-dropdown.component.ts

@@ -7,4 +7,9 @@ import { FilterDropdownComponent } from 'geonetwork-ui'
   styles: ``,
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class SearchFilterDropdownComponent extends FilterDropdownComponent {}
+export class SearchFilterDropdownComponent extends FilterDropdownComponent {
+  //FIXME: castings due to typing issues with gn-ui
+  onSelectedValuesWithCast(values: unknown[]) {
+    this.onSelectedValues(values as (string | number)[])
+  }
+}