Set MCP_AUTO_OPEN_ENABLED=false for test:e2e script

Since merging the latest changes from `main` that put auto-open back in when running the start or dev scripts, the `test:e2e` run results in the Inspector being opened in the browser. This change suppresses that (tested locally). Thanks, @cliffhall!

Co-authored-by: Cliff Hall <[email protected]>

Author: msabramo

package.json

@@ -34,7 +34,7 @@
     "start-client": "cd client && npm run preview",
     "test": "npm run prettier-check && cd client && npm test",
     "test-cli": "cd cli && npm run test",
-    "test:e2e": "npm run test:e2e --workspace=client",
+    "test:e2e": "MCP_AUTO_OPEN_ENABLED=false npm run test:e2e --workspace=client",
     "prettier-fix": "prettier --write .",
     "prettier-check": "prettier --check .",
     "lint": "prettier --check . && cd client && npm run lint",