Add ping/pong keep-alive to prevent service worker termination

extension/manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Playwriter MCP",
-  "version": "0.0.61",
+  "version": "0.0.64",
   "description": "Automate your Browser using Cursor, Claude, VS Code. More capable and context efficient than Playwright MCP.",
   "permissions": ["debugger", "tabGroups", "contextMenus", "tabs"],
   "host_permissions": ["<all_urls>"],

extension/package.json

@@ -1,6 +1,6 @@
 {
     "name": "mcp-extension",
-    "version": "0.0.61",
+    "version": "0.0.64",
     "description": "Playwright MCP Browser Extension",
     "private": true,
     "repository": {