Code coverage pre-QA push.

package.json

@@ -152,6 +152,7 @@
     "@webpack-cli/serve": "2.0.5",
     "babel-jest": "29.7.0",
     "babel-loader": "8.1.0",
+    "babel-plugin-istanbul": "7.0.1",
     "buffer": "5.1.0",
     "case-sensitive-paths-webpack-plugin": "2.4.0",
     "create-file-webpack": "1.0.2",
@@ -182,6 +183,7 @@
     "mini-css-extract-plugin": "2.1.0",
     "monaco-editor-webpack-plugin": "7.1.0",
     "node-fetch": "2.6.7",
+    "nyc": "18.0.0",
     "prettier": "3.0.3",
     "process": "0.11.10",
     "querystring-es3": "0.2.1",
@@ -213,6 +215,9 @@
     "test": "rimraf coverage && jest",
     "test:debug": "jest --runInBand",
     "test:e2e": "jest -c ./jest.config.playwright.js --detectOpenHandles",
+    "test:e2e:coverage": "COVERAGE=true npx playwright test",
+    "coverage:merge": "nyc merge .nyc_output .nyc_output/merged-coverage.json",
+    "coverage:report": "nyc report --temp-dir .nyc_output --report-dir coverage-e2e --reporter text --reporter text-summary --reporter lcov --reporter html",
     "test:file": "jest --coverage=false",
     "watch": "npm run start",
     "wait-for-server": "wait-on -t 240000 -i 5000 -v https-get://0.0.0.0:1234/",