Fix amOnPage auto-initialization with BROWSER_RESTART=browser

- Allow auto-initialization when manualStart is false
- Prevents 'Cannot navigate: browser is not running' error
- Fixes issue where Before() hooks run before _before() in restart=browser mode
- Only block navigation when manualStart is explicitly enabled

Author: kobenguyent

lib/helper/Playwright.js

@@ -1503,8 +1503,9 @@ class Playwright extends Helper {
       throw new Error('Cannot open pages inside an Electron container')
     }
 
-    // Prevent navigation attempts when browser is being torn down
-    if (!this.isRunning && (!this.browser || !this.browserContext || !this.page)) {
+    // Prevent navigation attempts only when manual start is enabled and browser is not running
+    // Allow auto-initialization for normal operation (e.g., when using BROWSER_RESTART=browser)
+    if (!this.isRunning && this.options.manualStart && (!this.browser || !this.browserContext || !this.page)) {
       throw new Error('Cannot navigate: browser is not running or has been closed')
     }