updated /quit to use new slash command arch (#4259)

Co-authored-by: Abhi <abhipatel@google.com>

packages/cli/src/ui/hooks/slashCommandProcessor.test.ts

@@ -54,16 +54,7 @@ vi.mock('../../utils/version.js', () => ({
 }));
 
 import { act, renderHook } from '@testing-library/react';
-import {
-  vi,
-  describe,
-  it,
-  expect,
-  beforeEach,
-  afterEach,
-  beforeAll,
-  Mock,
-} from 'vitest';
+import { vi, describe, it, expect, beforeEach, beforeAll, Mock } from 'vitest';
 import open from 'open';
 import { useSlashCommandProcessor } from './slashCommandProcessor.js';
 import { SlashCommandProcessorResult } from '../types.js';
@@ -203,8 +194,6 @@ describe('useSlashCommandProcessor', () => {
     );
   };
 
-  const getProcessor = () => getProcessorHook().result.current;
-
   describe('New command registry', () => {
     let ActualCommandService: typeof CommandService;
 
@@ -451,47 +440,4 @@ describe('useSlashCommandProcessor', () => {
       );
     });
   });
-
-  describe('/quit and /exit commands', () => {
-    beforeEach(() => {
-      vi.useFakeTimers();
-    });
-
-    afterEach(() => {
-      vi.useRealTimers();
-    });
-
-    it.each([['/quit'], ['/exit']])(
-      'should handle %s, set quitting messages, and exit the process',
-      async (command) => {
-        const { handleSlashCommand } = getProcessor();
-        const mockDate = new Date('2025-01-01T01:02:03.000Z');
-        vi.setSystemTime(mockDate);
-
-        await act(async () => {
-          handleSlashCommand(command);
-        });
-
-        expect(mockAddItem).not.toHaveBeenCalled();
-        expect(mockSetQuittingMessages).toHaveBeenCalledWith([
-          {
-            type: 'user',
-            text: command,
-            id: expect.any(Number),
-          },
-          {
-            type: 'quit',
-            duration: '1h 2m 3s',
-            id: expect.any(Number),
-          },
-        ]);
-
-        // Fast-forward timers to trigger process.exit
-        await act(async () => {
-          vi.advanceTimersByTime(100);
-        });
-        expect(mockProcessExit).toHaveBeenCalledWith(0);
-      },
-    );
-  });
 });