Fix intermittent Puppeteer session test failure with context safety checks

- Added safety checks for browser context existence before restoring session
- Added try-catch wrapper to handle page restoration failures gracefully
- Reset context-related variables (context, contextLocator) after session restore
- Matches safety improvements from Playwright helper (lines 1048-1069)
- Fixes 'Argument should belong to the same JavaScript world' protocol error

Author: kobenguyent

lib/helper/Puppeteer.js

@@ -436,9 +436,27 @@ class Puppeteer extends Helper {
         } else {
           this.activeSessionName = session
         }
+        
         const defaultCtx = this.browser.defaultBrowserContext()
-        const existingPages = defaultCtx.targets().filter(t => t.type() === 'page')
-        await this._setPage(await existingPages[0].page())
+        if (!defaultCtx) {
+          this.debug('Cannot restore session vars: default browser context is undefined')
+          return
+        }
+
+        try {
+          const existingPages = defaultCtx.targets().filter(t => t.type() === 'page')
+          if (existingPages && existingPages.length > 0) {
+            await this._setPage(await existingPages[0].page())
+            // Reset context-related variables to ensure clean state after session
+            this.context = await this.page
+            this.contextLocator = null
+          } else {
+            this.debug('Cannot restore session vars: no pages available')
+          }
+        } catch (err) {
+          this.debug(`Failed to restore session vars: ${err.message}`)
+          return
+        }
 
         return this._waitForAction()
       },