Lint coverage for src/scripts/*.js

Summary

ESLint does not cover the Node helper scripts under src/scripts/. The lint script runs eslint . from src/frontend (package.json → "lint": "cd src/frontend && npm run lint"), and the flat config's base path is src/frontend, so any file outside it is reported as "File ignored because outside of base path".

As a result, scripts like src/scripts/electron-dev.js, remove-locales.js, notarize.js, and sync-manifest-version.js are never linted in CI. They currently have to be checked by hand, e.g.:

node_modules/.bin/eslint --config src/frontend/eslint.config.js --no-config-lookup src/scripts/electron-dev.js

Proposal

Bring src/scripts/*.js into the lint path with a Node-oriented config block, and make npm run lint cover them automatically so they're checked in CI. Options to consider:

• A root-level flat config that includes both src/frontend and src/scripts, or
• A dedicated config block for src/scripts/**/*.js with Node globals and CommonJS sourceType.

These scripts are CommonJS Node (require/module.exports), so they need Node globals and sourceType: "commonjs" rather than the browser/React rules used for the frontend.

Acceptance criteria

• npm run lint lints src/scripts/*.js without manual --no-config-lookup invocations.
• Existing scripts pass (or get fixed) under the chosen ruleset.

Start with package.json and src/frontend/eslint.config.js, then inspect the CommonJS files under src/scripts/*.js. Run the existing npm run lint command to reproduce the ignored-file behavior and compare the available config approaches. Done means npm run lint checks those scripts automatically and all existing scripts pass or have their lint issues fixed.