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/nodeStates/bypass.spec.ts

@@ -8,10 +8,10 @@ const BYPASS_CLASS = /before:bg-bypass\/60/
 
 test.describe('Vue Node Bypass', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
-    await comfyPage.setSetting('Comfy.UseNewMenu', 'Top')
-    await comfyPage.setSetting('Comfy.Minimap.Visible', false)
-    await comfyPage.setSetting('Comfy.Graph.CanvasMenu', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.UseNewMenu', 'Top')
+    await comfyPage.settings.setSetting('Comfy.Minimap.Visible', false)
+    await comfyPage.settings.setSetting('Comfy.Graph.CanvasMenu', true)
     await comfyPage.vueNodes.waitForNodes()
   })
 

browser_tests/tests/vueNodes/nodeStates/collapse.spec.ts

@@ -5,9 +5,9 @@ import {
 
 test.describe('Vue Node Collapse', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.Graph.CanvasMenu', false)
-    await comfyPage.setSetting('Comfy.EnableTooltips', true)
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.Graph.CanvasMenu', false)
+    await comfyPage.settings.setSetting('Comfy.EnableTooltips', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.setup()
     await comfyPage.vueNodes.waitForNodes()
   })

browser_tests/tests/vueNodes/nodeStates/colors.spec.ts

@@ -5,9 +5,9 @@ import {
 
 test.describe('Vue Node Custom Colors', { tag: '@screenshot' }, () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.UseNewMenu', 'Top')
-    await comfyPage.setSetting('Comfy.Canvas.SelectionToolbox', true)
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.UseNewMenu', 'Top')
+    await comfyPage.settings.setSetting('Comfy.Canvas.SelectionToolbox', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.vueNodes.waitForNodes()
   })
 
@@ -31,7 +31,7 @@ test.describe('Vue Node Custom Colors', { tag: '@screenshot' }, () => {
   })
 
   test('should load node colors from workflow', async ({ comfyPage }) => {
-    await comfyPage.loadWorkflow('nodes/every_node_color')
+    await comfyPage.workflow.loadWorkflow('nodes/every_node_color')
     await expect(comfyPage.canvas).toHaveScreenshot(
       'vue-node-custom-colors-dark-all-colors.png'
     )
@@ -40,8 +40,8 @@ test.describe('Vue Node Custom Colors', { tag: '@screenshot' }, () => {
   test('should show brightened node colors on light theme', async ({
     comfyPage
   }) => {
-    await comfyPage.setSetting('Comfy.ColorPalette', 'light')
-    await comfyPage.loadWorkflow('nodes/every_node_color')
+    await comfyPage.settings.setSetting('Comfy.ColorPalette', 'light')
+    await comfyPage.workflow.loadWorkflow('nodes/every_node_color')
     await expect(comfyPage.canvas).toHaveScreenshot(
       'vue-node-custom-colors-light-all-colors.png'
     )

browser_tests/tests/vueNodes/nodeStates/error.spec.ts

@@ -7,7 +7,7 @@ const ERROR_CLASS = /border-node-stroke-error/
 
 test.describe('Vue Node Error', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.vueNodes.waitForNodes()
   })
 
@@ -15,7 +15,7 @@ test.describe('Vue Node Error', () => {
     comfyPage
   }) => {
     await comfyPage.setup()
-    await comfyPage.loadWorkflow('missing/missing_nodes')
+    await comfyPage.workflow.loadWorkflow('missing/missing_nodes')
 
     // Expect error state on missing unknown node
     const unknownNode = comfyPage.page.locator('[data-node-id]').filter({
@@ -28,7 +28,7 @@ test.describe('Vue Node Error', () => {
     comfyPage
   }) => {
     await comfyPage.setup()
-    await comfyPage.loadWorkflow('nodes/execution_error')
+    await comfyPage.workflow.loadWorkflow('nodes/execution_error')
     await comfyPage.runButton.click()
 
     const raiseErrorNode = comfyPage.vueNodes.getNodeByTitle('Raise Error')

browser_tests/tests/vueNodes/nodeStates/mute.spec.ts

@@ -8,7 +8,7 @@ const MUTE_OPACITY = '0.5'
 
 test.describe('Vue Node Mute', () => {
   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/nodeStates/pin.spec.ts

@@ -8,7 +8,7 @@ const PIN_INDICATOR = '[data-testid="node-pin-indicator"]'
 
 test.describe('Vue Node Pin', () => {
   test.beforeEach(async ({ comfyPage }) => {
-    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.settings.setSetting('Comfy.VueNodes.Enabled', true)
     await comfyPage.vueNodes.waitForNodes()
   })
 
@@ -55,7 +55,7 @@ test.describe('Vue Node Pin', () => {
     // Try to drag the node
     const headerPos = await checkpointNodeHeader.boundingBox()
     if (!headerPos) throw new Error('Failed to get header position')
-    await comfyPage.dragAndDrop(
+    await comfyPage.canvasOps.dragAndDrop(
       { x: headerPos.x, y: headerPos.y },
       { x: headerPos.x + 256, y: headerPos.y + 256 }
     )
@@ -71,7 +71,7 @@ test.describe('Vue Node Pin', () => {
     await comfyPage.page.keyboard.press(PIN_HOTKEY)
 
     // Try to drag the node again
-    await comfyPage.dragAndDrop(
+    await comfyPage.canvasOps.dragAndDrop(
       { x: headerPos.x, y: headerPos.y },
       { x: headerPos.x + 256, y: headerPos.y + 256 }
     )