Move front-end-only dependencies to devDependencies

[fredrikekelund]

Related issues

• Fixes STU-1747

How AI was used in this PR

Claude drove the implementation based on my spec.

Proposed Changes

The ASAR archive in the Electron app build contains a node_modules directory. We need that directory, but it would be ideal to exclude front-end-only dependencies, since they will already have been bundled by Vite. The idea is to save on the installer file size.

This PR does just that.

Testing Instructions

CI should pass.

Pre-merge Checklist

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

[wpmobilebot]

📊 Performance Test Results

Comparing 2832286 vs trunk

app-size

Metric	trunk	2832286	Diff	Change
App Size (Mac)	1376.63 MB	1194.62 MB	182.01 MB	🟢 -13.2%

site-editor

Metric	trunk	2832286	Diff	Change
load	1498 ms	1494 ms	4 ms	⚪ 0.0%

site-startup

Metric	trunk	2832286	Diff	Change
siteCreation	8584 ms	8589 ms	+5 ms	⚪ 0.0%
siteStartup	4926 ms	4939 ms	+13 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

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

[nightnei]

I have only concern about version updates, e.g. "react 18.2.0 to 18.3.1" etc. Is it expected or did it happen by mistake?
But, we are adding it to the first beta, so we can test everything carefully, catch potential errors caused by version upgrades, and fix them before the actual Studio release. So it LGTM.

[fredrikekelund]

version updates

This was a consequence of how Claude did it. I was able to rerun the installation command in a different way that seems to have mostly preserved the package versions, but just moved them to devDependencies 👍