chore: upgrade ESLint to v10 and fix newly surfaced issues

[KristjanESPERANTO]

eslint-plugin-import-x was the last thing blocking the ESLint v10 upgrade - it just got v10 support. So here we go.

The upgrade itself is tiny. The rest of the diff is cleanup from issues ESLint v10 now catches: a few let declarations with initial values that were immediately overwritten anyway (no-useless-assignment), and Translator listed in /* global */ in main.js and module.js.

Working through those no-useless-assignment warnings also surfaced a dead default in openmeteo: maxEntries: 5 in the constructor, which was never actually doing anything - openmeteo never reads this.config.maxEntries anywhere. And weather.js already sets that default for all providers, so it was just a redundant duplicate. Removed that too.

No runtime behavior changes.

[khassel]

We have a problem introduced with this PR or #4056

Tested a fresh install of develop inside a node container:

docker run --rm -it node:25-alpine sh
cd
apk add git
git clone -b develop https://github.com/MagicMirrorOrg/MagicMirror.git
cd MagicMirror/
node --run install-mm
node --run server
node:internal/modules/cjs/loader:1478
  throw err;
  ^

Error: Cannot find module 'globals'
Require stack:
- /root/MagicMirror/js/utils.js
- /root/MagicMirror/js/app.js
- /root/MagicMirror/serveronly/index.js
    at Module.<anonymous> (node:internal/modules/cjs/loader:1475:15)
    at Module._resolveFilename (/root/MagicMirror/js/alias-resolver.js:28:30)
    at wrapResolveFilename (node:internal/modules/cjs/loader:1048:27)
    at defaultResolveImplForCJSLoading (node:internal/modules/cjs/loader:1072:10)
    at resolveForCJSWithHooks (node:internal/modules/cjs/loader:1093:12)
    at Module._load (node:internal/modules/cjs/loader:1261:25)
    at wrapModuleLoad (node:internal/modules/cjs/loader:255:19)
    at Module.require (node:internal/modules/cjs/loader:1575:12)
    at require (node:internal/modules/helpers:191:16)
    at Object.<anonymous> (/root/MagicMirror/js/utils.js:12:17) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/root/MagicMirror/js/utils.js',
    '/root/MagicMirror/js/app.js',
    '/root/MagicMirror/serveronly/index.js'
  ]
}

Node.js v25.8.1

If I run npm i then node --run server works.

Any idea to this @KristjanESPERANTO ?

[KristjanESPERANTO]

Try 'npm Install globals'. I'm not at my computer for some hours.

[khassel]

Thanks, that works.

Was already preparing a PR for new electron version, will add globals with that PR.