[Test] Fix flaky playwright tests (#3170)

browser_tests/tests/domWidget.spec.ts

@@ -5,8 +5,8 @@ import { comfyPageFixture as test } from '../fixtures/ComfyPage'
 test.describe('DOM Widget', () => {
   test('Collapsed multiline textarea is not visible', async ({ comfyPage }) => {
     await comfyPage.loadWorkflow('collapsed_multiline')
-
-    expect(comfyPage.page.locator('.comfy-multiline-input')).not.toBeVisible()
+    const textareaWidget = comfyPage.page.locator('.comfy-multiline-input')
+    await expect(textareaWidget).not.toBeVisible()
   })
 
   test('Multiline textarea correctly collapses', async ({ comfyPage }) => {

browser_tests/tests/remoteWidgets.spec.ts

@@ -321,6 +321,7 @@ test.describe('Remote COMBO Widget', () => {
 
       // Click refresh button
       await clickRefreshButton(comfyPage, nodeName)
+      await comfyPage.page.waitForTimeout(200)
 
       // Verify the selected value of the widget is the first option in the refreshed list
       const refreshedValue = await getWidgetValue(comfyPage, nodeName)

browser_tests/tests/sidebar/workflows.spec.ts

@@ -227,6 +227,7 @@ test.describe('Workflows sidebar', () => {
 
     await topbar.saveWorkflowAs('workflow1.json')
     await comfyPage.confirmDialog.click('overwrite')
+    await comfyPage.page.waitForTimeout(200)
     // The old workflow1.json should be deleted and the new one should be saved.
     expect(await comfyPage.menu.workflowsTab.getOpenedWorkflowNames()).toEqual([
       'workflow2.json',