test: App mode - Add test for cross-workflow input corruption (#10944)

## Summary

Adds test for the issue where inputs from one workflow would overwrite
those on another after sorting

## Changes

- **What**: 
- add test

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10944-test-App-mode-Add-test-for-cross-workflow-input-corruption-33b6d73d365081deab26d8f23d2318ae)
by [Unito](https://www.unito.io)

browser_tests/helpers/builderTestUtils.ts

@@ -124,3 +124,21 @@ export async function saveAndReopenInAppMode(
 
   await comfyPage.appMode.toggleAppMode()
 }
+
+/**
+ * Enter builder, select the given widgets as inputs + SaveImage as output,
+ * save as an app, and close the success dialog.
+ *
+ * Returns on the builder arrange/preview step.
+ */
+export async function createAndSaveApp(
+  comfyPage: ComfyPage,
+  appName: string,
+  widgetNames: string[] = ['seed']
+): Promise<void> {
+  await setupBuilder(comfyPage, undefined, widgetNames)
+  await comfyPage.appMode.steps.goToPreview()
+  await builderSaveAs(comfyPage.appMode, appName)
+  await comfyPage.appMode.saveAs.closeButton.click()
+  await comfyPage.nextFrame()
+}

browser_tests/tests/builderReorder.spec.ts

@@ -6,6 +6,7 @@ import type { ComfyPage } from '@e2e/fixtures/ComfyPage'
 import type { AppModeHelper } from '@e2e/fixtures/helpers/AppModeHelper'
 import {
   builderSaveAs,
+  createAndSaveApp,
   openWorkflowFromSidebar,
   setupBuilder
 } from '@e2e/helpers/builderTestUtils'
@@ -154,4 +155,51 @@ test.describe('Builder input reordering', { tag: '@ui' }, () => {
       'seed'
     ])
   })
+
+  test('Reordering inputs in one app does not corrupt another app', async ({
+    comfyPage
+  }) => {
+    const { appMode } = comfyPage
+    const suffix = String(Date.now())
+    const app1Name = `app1-${suffix}`
+    const app2Name = `app2-${suffix}`
+    const app2Widgets = ['seed', 'steps']
+
+    // Create and save app1 with [seed, steps, cfg]
+    await createAndSaveApp(comfyPage, app1Name, WIDGETS)
+    await appMode.footer.exitBuilder()
+
+    // Create app2 in a new tab so both apps are open simultaneously
+    await comfyPage.menu.topbar.triggerTopbarCommand(['New'])
+    await createAndSaveApp(comfyPage, app2Name, app2Widgets)
+    await appMode.footer.exitBuilder()
+
+    // Switch to app1 tab and enter builder
+    await comfyPage.menu.topbar.getWorkflowTab(app1Name).click()
+    await appMode.enterBuilder()
+    await appMode.steps.goToInputs()
+    await expect(appMode.select.inputItemTitles).toHaveText(WIDGETS)
+
+    // Reorder app1 inputs: drag 'seed' from first to last
+    await appMode.select.dragInputItem(0, 2)
+    const app1Reordered = ['steps', 'cfg', 'seed']
+    await expect(appMode.select.inputItemTitles).toHaveText(app1Reordered)
+
+    // Switch to app2 tab and enter builder
+    await appMode.footer.exitBuilder()
+    await comfyPage.menu.topbar.getWorkflowTab(app2Name).click()
+    await appMode.enterBuilder()
+    await appMode.steps.goToInputs()
+
+    // Verify app2 inputs are not corrupted — still [seed, steps]
+    await expect(appMode.select.inputItemTitles).toHaveText(app2Widgets)
+
+    // Switch back to app1 and verify reorder persisted
+    await appMode.footer.exitBuilder()
+    await comfyPage.menu.topbar.getWorkflowTab(app1Name).click()
+    await appMode.enterBuilder()
+    await appMode.steps.goToInputs()
+
+    await expect(appMode.select.inputItemTitles).toHaveText(app1Reordered)
+  })
 })