fix: set add button to disabled until task name is provided (#2996)

set add button to disabled until task name is provided
fix planner localization string

Author: musale

packages/mgt-components/src/components/mgt-planner/mgt-planner.ts

@@ -871,6 +871,7 @@ export class MgtPlanner extends MgtTemplatedTaskComponent {
       : html`
           <fluent-button
             class="add-task"
+            ?disabled=${!this._newTaskName}
             @click=${this.onAddTaskClick}
             @keydown=${this.onAddTaskKeyDown}
             appearance="neutral">

stories/samples/general.stories.js

@@ -42,7 +42,7 @@ export const Localization = () => html`
           noResultsFound: 'لم يتم العثور على نتائج',
           loadingMessage: 'Loading...'
         },
-        tasks: {
+        planner: {
           removeTaskSubtitle: 'delete',
           cancelNewTaskSubtitle: 'canceltest',
           newTaskPlaceholder: 'newTaskTest',