fix: use WithinContext.endCurrent() in switchTo to properly clear context

Addresses review feedback from DenysKuchma.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: DavertMik

lib/helper/Playwright.js

@@ -35,6 +35,7 @@ import MultipleElementsFound from './errors/MultipleElementsFound.js'
 import RemoteBrowserConnectionRefused from './errors/RemoteBrowserConnectionRefused.js'
 import Popup from './extras/Popup.js'
 import Console from './extras/Console.js'
+import { WithinContext } from '../step/within.js'
 import { findReact, findVue, findByPlaywrightLocator } from './extras/PlaywrightReactVueLocator.js'
 import { dropFile } from './scripts/dropFile.js'
 import WebElement from '../element/WebElement.js'
@@ -3609,9 +3610,7 @@ class Playwright extends Helper {
    * {{> switchTo }}
    */
   async switchTo(locator) {
-    if (this.withinLocator) {
-      await this._withinEnd()
-    }
+    WithinContext.endCurrent()
 
     if (Number.isInteger(locator)) {
       // Select by frame index of current context

lib/helper/Puppeteer.js

@@ -35,6 +35,7 @@ import { isColorProperty, convertColorToRGBA } from '../colorUtils.js'
 import ElementNotFound from './errors/ElementNotFound.js'
 import MultipleElementsFound from './errors/MultipleElementsFound.js'
 import RemoteBrowserConnectionRefused from './errors/RemoteBrowserConnectionRefused.js'
+import { WithinContext } from '../step/within.js'
 import Popup from './extras/Popup.js'
 import Console from './extras/Console.js'
 import { highlightElement } from './scripts/highlightElement.js'
@@ -2674,9 +2675,7 @@ class Puppeteer extends Helper {
    * {{> switchTo }}
    */
   async switchTo(locator) {
-    if (this.withinLocator) {
-      await this._withinEnd()
-    }
+    WithinContext.endCurrent()
 
     if (Number.isInteger(locator)) {
       // Select by frame index of current context

lib/helper/WebDriver.js

@@ -32,6 +32,7 @@ import { isColorProperty, convertColorToRGBA } from '../colorUtils.js'
 import ElementNotFound from './errors/ElementNotFound.js'
 import MultipleElementsFound from './errors/MultipleElementsFound.js'
 import ConnectionRefused from './errors/ConnectionRefused.js'
+import { WithinContext } from '../step/within.js'
 import Locator from '../locator.js'
 import { highlightElement } from './scripts/highlightElement.js'
 import { focusElement } from './scripts/focusElement.js'
@@ -2799,9 +2800,7 @@ class WebDriver extends Helper {
    * {{> switchTo }}
    */
   async switchTo(locator) {
-    if (this.withinLocator) {
-      await this._withinEnd()
-    }
+    WithinContext.endCurrent()
 
     this.browser.isInsideFrame = true
     if (!locator) {