test(ui-web): add explicit afterEach mock cleanup in SimulatorBar test

Aligns SimulatorBar.test.ts with the dominant convention in ui/web's test
suite (Dialogs, StationCard, ConnectorRow, ClassicLayout, Actions, …),
which all add an explicit `afterEach(() => { vi.clearAllMocks() })`
alongside vitest.config.ts's global `clearMocks: true` / `restoreMocks: true`.
Belt-and-braces: the explicit reset keeps mock lifecycle visible next to
the mock declarations, even though it is technically redundant with the
global flags.

Author: jerome-benoit

ui/web/tests/unit/skins/modern/SimulatorBar.test.ts

@@ -4,7 +4,7 @@
  */
 import { mount } from '@vue/test-utils'
 import { SKIN_IDS, THEME_IDS } from 'ui-common'
-import { describe, expect, it, vi } from 'vitest'
+import { afterEach, describe, expect, it, vi } from 'vitest'
 
 import SimulatorBar from '@/skins/modern/components/SimulatorBar.vue'
 
@@ -65,6 +65,10 @@ function mountBar (props: Record<string, unknown> = {}) {
 }
 
 describe('SimulatorBar', () => {
+  afterEach(() => {
+    vi.clearAllMocks()
+  })
+
   it('should show Disconnected pill when simulatorState is undefined', () => {
     const wrapper = mountBar()
     expect(wrapper.text()).toContain('Disconnected')