fix(browser): don't scale the iframe if UI is disabled (#9018)

Author: sheremet-va

packages/browser-playwright/src/playwright.ts

@@ -365,6 +365,10 @@ export class PlaywrightBrowserProvider implements BrowserProvider {
     if (this.project.config.browser.ui) {
       options.viewport = null
     }
+    else {
+      // if UI is disabled, keep the iframe scale to 1
+      options.viewport ??= this.project.config.browser.viewport
+    }
     const context = await browser.newContext(options)
     await this._throwIfClosing(context)
     if (actionTimeout != null) {