feat(CI): modular testing and linting system + cursor rule

package.json

@@ -19,8 +19,10 @@
     "convert:safari": "xcrun safari-web-extension-converter dist/safari --project-location . --app-name $npm_package_name-safari",
     "dependency-graph": "depcruise src --include-only \"^src\" --output-type dot | dot -T svg > dependency-graph.svg",
     "lint": "cross-env ESLINT_USE_FLAT_CONFIG=false eslint \"src/**/*.{js,ts}\"",
-    "test": "jest",
+    "test": "npm run test:unit",
+    "test:unit": "jest",
     "test:smoke": "node scripts/smoke-test.mjs",
+    "test:ci": "npm run test:unit && npm run build && npm run test:smoke",
     "release": "gh release create $npm_package_version --repo BetterSEQTA/BetterSEQTA-Plus ./dist/*.zip --generate-notes",
     "publish": "bun lib/publish.js --b",
     "zip": "bedframe zip"
@@ -58,6 +60,7 @@
     "eslint-plugin-import": "^2.31.0",
     "glob": "^11.0.1",
     "jest": "^30.4.2",
+    "jest-environment-jsdom": "^30.4.1",
     "mime-types": "^3.0.1",
     "prettier": "^3.5.3",
     "process": "^0.11.10",