core: frontend: Fail build on corrupt emitted JavaScript

[joaoantoniocardoso]

Brings the fix for #4091 from #4094 (1.4) into master.

[github-actions]

Automated PR Review

0. Summary

• Verdict: LGTM

Adds a post-compression Vite plugin (validate-emitted-javascript) that recursively walks dist/, gunzips each .js/.js.gz chunk, and runs esbuild.transformSync on it — so a corrupt emitted chunk (like the source-map-as-chunk regression in 1.4.4-beta.14) fails the build instead of only breaking the route that imports it at runtime. enforce: 'post' plus closeBundle: { sequential: true } correctly orders it after viteCompression, so it validates the exact bytes nginx serves via gzip_static. esbuild is a transitive dep of Vite so require('esbuild') resolves reliably; the regex /\.js(\.gz)?$/ correctly ignores .js.map sourcemaps (which aren't in the compression filter and remain as-is on disk) and doesn't accidentally match .mjs/.cjs. Comment style explains the "why" without parroting, and the change follows the existing CommonJS require() pattern already used in this file.

No further comments, nice job 👍

Generated by PR Review Bot. This is advisory, a human reviewer must still approve.