test(browser): refactor browser tests for reliability and maintainability (#8510)

## Summary

Major refactoring of browser tests to improve reliability,
maintainability, and type safety.

## Changes

### Test Infrastructure Decomposition
- Decomposed `ComfyPage.ts` (~1000 lines) into focused helpers:
- `CanvasHelper`, `DebugHelper`, `SubgraphHelper`,
`NodeOperationsHelper`
- `SettingsHelper`, `WorkflowHelper`, `ClipboardHelper`,
`KeyboardHelper`
- Created `ContextMenu` page object, `BaseDialog` base class, and
`BottomPanel` page object
- Extracted `DefaultGraphPositions` constants

### Locator Stability
- Added `data-testid` attributes to Vue components (sidebar, dialogs,
node library)
- Created centralized `selectors.ts` with test ID constants
- Replaced fragile CSS selectors (`.nth()`, `:nth-child()`) with
`getByTestId`/`getByRole`

### Performance & Reliability
- Removed `setTimeout` anti-patterns (replaced with `waitForFunction`)
- Replaced `waitForTimeout` with retrying assertions
- Replaced hardcoded coordinates with computed `NodeReference` positions
- Enforced LF line endings for all text files

### Type Safety
- Enabled `no-explicit-any` lint rule for browser_tests via oxlint
- Purged `as any` casts from browser_tests
- Added Window type augmentation for standardized window access
- Added proper type annotations throughout

### Bug Fixes
- Restored `ExtensionManager` API contract
- Removed test-only settings from production schema
- Fixed flaky selectors and missing test setup

## Testing
- All browser tests pass
- Typecheck passes


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Tests**
* Overhauled browser E2E test infrastructure with many new
helpers/fixtures, updated test APIs, and CI test container image bumped
for consistency.

* **Chores**
* Standardized line endings and applied stricter lint rules for browser
tests; workspace dependency version updated.

* **Documentation**
* Updated Playwright and TypeScript testing guidance and test-run
commands.

* **UI**
* Added stable data-testids to multiple components to improve
testability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

browser_tests/tests/vueNodes/widgets/int/integerWidget.spec.ts

@@ -5,14 +5,14 @@ import {
 
 test.describe('Vue Integer Widget', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.setup()
   })
 
   test('should be disabled and not allow changing value when link connected to slot', async ({
     comfyPage
   }) => {
-    await comfyPage.loadWorkflow('vueNodes/linked-int-widget')
+    await comfyPage.workflow.loadWorkflow('vueNodes/linked-int-widget')
     await comfyPage.vueNodes.waitForNodes()
 
     const seedWidget = comfyPage.vueNodes

browser_tests/tests/vueNodes/widgets/load/uploadWidgets.spec.ts

@@ -5,7 +5,7 @@ import {
 
 test.describe('Vue Upload Widgets', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.vueNodes.waitForNodes()
   })
 
@@ -14,7 +14,7 @@ test.describe('Vue Upload Widgets', () => {
     { tag: '@screenshot' },
     async ({ comfyPage }) => {
       await comfyPage.setup()
-      await comfyPage.loadWorkflow('widgets/all_load_widgets')
+      await comfyPage.workflow.loadWorkflow('widgets/all_load_widgets')
       await comfyPage.vueNodes.waitForNodes()
 
       await expect(comfyPage.canvas).toHaveScreenshot(

browser_tests/tests/vueNodes/widgets/text/multilineStringWidget.spec.ts

@@ -1,12 +1,12 @@
 import {
-  type ComfyPage,
   comfyExpect as expect,
   comfyPageFixture as test
 } from '../../../../fixtures/ComfyPage'
+import type { ComfyPage } from '../../../../fixtures/ComfyPage'
 
 test.describe('Vue Multiline String Widget', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.vueNodes.waitForNodes()
   })
 

browser_tests/tests/vueNodes/widgets/widgetReactivity.spec.ts

@@ -2,10 +2,11 @@ import {
   comfyExpect as expect,
   comfyPageFixture as test
 } from '../../../fixtures/ComfyPage'
+import type { TestGraphAccess } from '../../../types/globals'
 
 test.describe('Vue Widget Reactivity', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.vueNodes.waitForNodes()
   })
   test('Should display added widgets', async ({ comfyPage }) => {
@@ -13,18 +14,21 @@ test.describe('Vue Widget Reactivity', () => {
       'css=[data-testid="node-body-4"] > .lg-node-widgets > div'
     )
     await comfyPage.page.evaluate(() => {
-      const node = window['graph']._nodes_by_id['4']
-      node.widgets.push(node.widgets[0])
+      const graph = window.graph as TestGraphAccess
+      const node = graph._nodes_by_id['4']
+      node.widgets!.push(node.widgets![0])
     })
     await expect(loadCheckpointNode).toHaveCount(2)
     await comfyPage.page.evaluate(() => {
-      const node = window['graph']._nodes_by_id['4']
-      node.widgets[2] = node.widgets[0]
+      const graph = window.graph as TestGraphAccess
+      const node = graph._nodes_by_id['4']
+      node.widgets![2] = node.widgets![0]
     })
     await expect(loadCheckpointNode).toHaveCount(3)
     await comfyPage.page.evaluate(() => {
-      const node = window['graph']._nodes_by_id['4']
-      node.widgets.splice(0, 0, node.widgets[0])
+      const graph = window.graph as TestGraphAccess
+      const node = graph._nodes_by_id['4']
+      node.widgets!.splice(0, 0, node.widgets![0])
     })
     await expect(loadCheckpointNode).toHaveCount(4)
   })
@@ -33,18 +37,21 @@ test.describe('Vue Widget Reactivity', () => {
       'css=[data-testid="node-body-3"] > .lg-node-widgets > div'
     )
     await comfyPage.page.evaluate(() => {
-      const node = window['graph']._nodes_by_id['3']
-      node.widgets.pop()
+      const graph = window.graph as TestGraphAccess
+      const node = graph._nodes_by_id['3']
+      node.widgets!.pop()
     })
     await expect(loadCheckpointNode).toHaveCount(5)
     await comfyPage.page.evaluate(() => {
-      const node = window['graph']._nodes_by_id['3']
-      node.widgets.length--
+      const graph = window.graph as TestGraphAccess
+      const node = graph._nodes_by_id['3']
+      node.widgets!.length--
     })
     await expect(loadCheckpointNode).toHaveCount(4)
     await comfyPage.page.evaluate(() => {
-      const node = window['graph']._nodes_by_id['3']
-      node.widgets.splice(0, 1)
+      const graph = window.graph as TestGraphAccess
+      const node = graph._nodes_by_id['3']
+      node.widgets!.splice(0, 1)
     })
     await expect(loadCheckpointNode).toHaveCount(3)
   })