Fix Studio Code syntax error in Node.js 22

[fredrikekelund]

Related issues

• Fixes STU-1857

How AI was used in this PR

Claude was used to help identify and fix the issue.

Proposed Changes

We recently updated to Vite 8 (see #3674 and related PRs). Previously, Vite transformed the JS output to support our targeted Node.js version. It still can, but Vite 8 wasn't picking up the transform target based on our existing config. This PR adds the necessary config to transform the output JS code so Node.js 22 supports it.

All of this is obviously related to Vite 8 swapping out esbuild/Rollup for Rolldown.

Testing Instructions

1. npm run cli:build
2. nvm use 22
3. node apps/cli/dist/cli/main.mjs code
4. Ensure Studio Code starts

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[fredrikekelund]

A quick look at the Vite docs suggests that build.target should be enough, but it clearly isn't in our case.

[wpmobilebot]

📊 Performance Test Results

Comparing 1d79dd8 vs trunk

app-size

Metric	trunk	1d79dd8	Diff	Change
App Size (Mac)	2357.80 MB	2357.79 MB	0.00 MB	⚪ 0.0%

site-editor

Metric	trunk	1d79dd8	Diff	Change
load	1763 ms	1730 ms	33 ms	⚪ 0.0%

site-startup

Metric	trunk	1d79dd8	Diff	Change
siteCreation	8571 ms	8527 ms	44 ms	⚪ 0.0%
siteStartup	3908 ms	3880 ms	28 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)

[sejas]

Looks good. Thanks for fixing it. I confirm I was able to execute nvm use 22 && node apps/cli/dist/cli/main.mjs code after running nvm use && npm i && npm run cli:build.

We could consider using node 22 CI unit test or similar.

[fredrikekelund]

We could consider using node 22 CI unit test or similar.

@youknowriad also suggested some smoke tests (in the true "does this thing even work?" sense) that we could run for different Node.js versions. I'll defer to @bcotrim on this, because I think he might be driving changing the E2E test suite to run on the CLI at some point soon