fix(aria/menu): unable to set softDisabled (#33265)

Fixes the following issues in the Aria menu:
1. The menu didn't have a `softDisabled` input.
2. The menu bar had a `softDisabled` input, but it was being ignored.

Fixes #33262.

Author: crisbeto

goldens/aria/menu/index.api.md

@@ -25,13 +25,14 @@ export class Menu<V> implements OnDestroy {
     ngOnDestroy(): void;
     readonly parent: _angular_core.WritableSignal<MenuTrigger<V> | MenuItem<V> | undefined>;
     readonly _pattern: MenuPattern<V>;
+    readonly softDisabled: _angular_core.InputSignalWithTransform<boolean, unknown>;
     readonly tabIndex: Signal<0 | -1>;
     readonly textDirection: _angular_core.WritableSignal<_angular_cdk_bidi.Direction>;
     readonly typeaheadDelay: _angular_core.InputSignal<number>;
     readonly visible: Signal<boolean>;
     readonly wrap: _angular_core.InputSignalWithTransform<boolean, unknown>;
     // (undocumented)
-    static ɵdir: _angular_core.ɵɵDirectiveDeclaration<Menu<any>, "[ngMenu]", ["ngMenu"], { "id": { "alias": "id"; "required": false; "isSignal": true; }; "wrap": { "alias": "wrap"; "required": false; "isSignal": true; }; "typeaheadDelay": { "alias": "typeaheadDelay"; "required": false; "isSignal": true; }; "disabled": { "alias": "disabled"; "required": false; "isSignal": true; }; "expansionDelay": { "alias": "expansionDelay"; "required": false; "isSignal": true; }; }, { "itemSelected": "itemSelected"; }, never, never, true, [{ directive: typeof DeferredContentAware; inputs: { "preserveContent": "preserveContent"; }; outputs: {}; }]>;
+    static ɵdir: _angular_core.ɵɵDirectiveDeclaration<Menu<any>, "[ngMenu]", ["ngMenu"], { "id": { "alias": "id"; "required": false; "isSignal": true; }; "wrap": { "alias": "wrap"; "required": false; "isSignal": true; }; "typeaheadDelay": { "alias": "typeaheadDelay"; "required": false; "isSignal": true; }; "disabled": { "alias": "disabled"; "required": false; "isSignal": true; }; "softDisabled": { "alias": "softDisabled"; "required": false; "isSignal": true; }; "expansionDelay": { "alias": "expansionDelay"; "required": false; "isSignal": true; }; }, { "itemSelected": "itemSelected"; }, never, never, true, [{ directive: typeof DeferredContentAware; inputs: { "preserveContent": "preserveContent"; }; outputs: {}; }]>;
     // (undocumented)
     static ɵfac: _angular_core.ɵɵFactoryDeclaration<Menu<any>, never>;
 }

src/aria/menu/menu-bar.ts

@@ -113,7 +113,6 @@ export class MenuBar<V> implements OnDestroy {
       ...this,
       items: this._itemPatterns,
       multi: () => false,
-      softDisabled: () => true,
       focusMode: () => 'roving',
       orientation: () => 'horizontal',
       selectionMode: () => 'explicit',

src/aria/menu/menu.spec.ts

@@ -498,6 +498,32 @@ describe('Standalone Menu Pattern', () => {
     expect(item?.getAttribute('aria-label')).toBe('Apple item label');
   });
 
+  describe('softDisabled', () => {
+    it('should skip disabled items during navigation when softDisabled is false', () => {
+      setupMenu();
+      fixture.componentInstance.softDisabled.set(false);
+      fixture.detectChanges();
+
+      const apple = getItem('Apple')!;
+      const berries = getItem('Berries');
+
+      keydown(apple, 'ArrowUp');
+      expect(document.activeElement).toBe(berries);
+    });
+
+    it('should focus disabled items during navigation when softDisabled is true', () => {
+      setupMenu();
+      fixture.componentInstance.softDisabled.set(true);
+      fixture.detectChanges();
+
+      const apple = getItem('Apple')!;
+      const cherry = getItem('Cherry');
+
+      keydown(apple!, 'ArrowUp');
+      expect(document.activeElement).toBe(cherry);
+    });
+  });
+
   describe('structural validations', () => {
     let consoleSpy: jasmine.Spy;
 
@@ -1077,7 +1103,7 @@ describe('Menu Bar Pattern', () => {
 
 @Component({
   template: `
-    <div ngMenu [expansionDelay]="0" (itemSelected)="itemSelected($event)">
+    <div ngMenu [softDisabled]="softDisabled()" [expansionDelay]="0" (itemSelected)="itemSelected($event)">
       <ng-template ngMenuContent>
         <div
           ngMenuItem
@@ -1104,6 +1130,7 @@ describe('Menu Bar Pattern', () => {
 })
 class StandaloneMenuExample {
   firstItemAriaLabel = signal<string | null>(null);
+  softDisabled = signal(true);
 
   itemSelected(value: string) {}
 }

src/aria/menu/menu.ts

@@ -114,6 +114,9 @@ export class Menu<V> implements OnDestroy {
   /** A reference to the parent menu item or menu trigger. */
   readonly parent = signal<MenuTrigger<V> | MenuItem<V> | undefined>(undefined);
 
+  /** Whether the menu is soft disabled. */
+  readonly softDisabled = input(true, {transform: booleanAttribute});
+
   /** The menu ui pattern instance. */
   readonly _pattern: MenuPattern<V>;
 
@@ -152,7 +155,6 @@ export class Menu<V> implements OnDestroy {
       parent: computed(() => this.parent()?._pattern),
       items: this._itemPatterns,
       multi: () => false,
-      softDisabled: () => true,
       focusMode: () => 'roving',
       orientation: () => 'vertical',
       selectionMode: () => 'explicit',