fix(module:input): render icon when enterButton is an empty string (#9498)

Author: HyperLife1119

components/input/input-search.directive.spec.ts

@@ -75,6 +75,15 @@ describe('input-search', () => {
     expect(searchButtonElement.classList).toContain('ant-btn-primary');
   });
 
+  it('should be render search icon when enterButton is an empty string', async () => {
+    const searchButtonElement: HTMLButtonElement = fixture.nativeElement.querySelector('.ant-input-search-button');
+    component.enterButton = '';
+    fixture.detectChanges();
+    await fixture.whenStable();
+    const searchIconElement = searchButtonElement.querySelector('.anticon-search');
+    expect(searchIconElement).toBeTruthy();
+  });
+
   it('should be apply size classes to search button', async () => {
     const searchButtonElement: HTMLButtonElement = fixture.nativeElement.querySelector('.ant-input-search-button');
     expect(searchButtonElement).toBeTruthy();

components/input/input-wrapper.component.ts

@@ -68,7 +68,8 @@ import { NZ_INPUT_WRAPPER } from './tokens';
         @if (hasAddonAfter()) {
           <span class="ant-input-group-addon">
             @if (inputSearchDir) {
-              @let hasEnterButton = inputSearchEnterButton() ?? inputSearchDir.nzEnterButton() !== false;
+              @let nzEnterButton = inputSearchDir.nzEnterButton();
+              @let hasEnterButton = inputSearchEnterButton() ?? nzEnterButton !== false;
               <button
                 nz-button
                 [nzType]="hasEnterButton ? 'primary' : 'default'"
@@ -79,8 +80,8 @@ import { NZ_INPUT_WRAPPER } from './tokens';
                 (click)="inputSearchDir.search($event)"
               >
                 <ng-content select="[nzInputSearchEnterButton]">
-                  @if (typeof inputSearchDir.nzEnterButton() === 'string') {
-                    {{ inputSearchDir.nzEnterButton() }}
+                  @if (nzEnterButton && typeof nzEnterButton === 'string') {
+                    {{ nzEnterButton }}
                   } @else {
                     <nz-icon nzType="search" nzTheme="outline" />
                   }