fix(issues): show correct notification when deleting all issues in query

static/app/stores/groupStore.spec.tsx

@@ -3,6 +3,7 @@ import {GroupFixture} from 'sentry-fixture/group';
 import {ProjectFixture} from 'sentry-fixture/project';
 
 import GroupStore from 'sentry/stores/groupStore';
+import IndicatorStore from 'sentry/stores/indicatorStore';
 import type {TimeseriesValue} from 'sentry/types/core';
 import type {Group, GroupStats} from 'sentry/types/group';
 import {GroupActivityType} from 'sentry/types/group';
@@ -228,6 +229,35 @@ describe('GroupStore', () => {
         expect(GroupStore.trigger).toHaveBeenCalledTimes(1);
         expect(GroupStore.trigger).toHaveBeenCalledWith(new Set(['1', '2', '3']));
       });
+
+      it('should show generic message when itemIds is undefined', () => {
+        const addMessageSpy = jest.spyOn(IndicatorStore, 'addMessage');
+        GroupStore.onDeleteSuccess('1337', undefined, {});
+
+        expect(addMessageSpy).toHaveBeenCalledWith('Deleted selected issues', 'success', {
+          duration: 4000,
+        });
+      });
+
+      it('should show specific count when itemIds is provided', () => {
+        const addMessageSpy = jest.spyOn(IndicatorStore, 'addMessage');
+        GroupStore.onDeleteSuccess('1337', ['1', '2'], {});
+
+        expect(addMessageSpy).toHaveBeenCalledWith('Deleted 2 Issues', 'success', {
+          duration: 4000,
+        });
+      });
+
+      it('should show shortId for single issue deletion', () => {
+        const addMessageSpy = jest.spyOn(IndicatorStore, 'addMessage');
+        const mockGroup = g('1', {shortId: 'ABC-123'});
+        jest.spyOn(GroupStore, 'get').mockReturnValue(mockGroup);
+        GroupStore.onDeleteSuccess('1337', ['1'], {});
+
+        expect(addMessageSpy).toHaveBeenCalledWith('Deleted ABC-123', 'success', {
+          duration: 4000,
+        });
+      });
     });
 
     describe('onAssignToSuccess()', () => {

static/app/stores/groupStore.tsx

@@ -365,7 +365,9 @@ const storeConfig: GroupStoreDefinition = {
   onDeleteSuccess(_changeId, itemIds, _response) {
     const ids = this.itemIdsOrAll(itemIds);
 
-    if (ids.length > 1) {
+    if (itemIds === undefined) {
+      showAlert(t('Deleted selected issues'), 'success');
+    } else if (ids.length > 1) {
       showAlert(t('Deleted %d Issues', ids.length), 'success');
     } else {
       const shortId = ids.map(item => GroupStore.get(item)?.shortId).join('');