Remove ENABLE_STUDIO_AI feature flag and release studio code command

[sejas]

Related issues

• Fixes STU-1445

How AI was used in this PR

Claude removed the feature flag wrapper and associated build config entries. All changes were reviewed before committing.

Proposed Changes

• Remove the __ENABLE_STUDIO_AI__ feature flag guard from apps/cli/index.ts, making the studio code command always available
• Remove the __ENABLE_STUDIO_AI__ define from vite.config.base.ts (production) and vite.config.dev.ts (dev)
• Remove the __ENABLE_STUDIO_AI__ type declaration from globals.d.ts

Testing Instructions

1. Build the CLI: npm run cli:build:prod
2. Run node apps/cli/dist/cli/main.mjs --help and verify the command code is in the list
3. Run node apps/cli/dist/cli/main.mjs code --help and verify the command is registered

Pre-merge Checklist

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

[wpmobilebot]

📊 Performance Test Results

Comparing a87ecc7 vs trunk

app-size

Metric	trunk	a87ecc7	Diff	Change
App Size (Mac)	1261.00 MB	1261.14 MB	+0.14 MB	⚪ 0.0%

site-editor

Metric	trunk	a87ecc7	Diff	Change
load	1831 ms	1834 ms	+3 ms	⚪ 0.0%

site-startup

Metric	trunk	a87ecc7	Diff	Change
siteCreation	8119 ms	8134 ms	+15 ms	⚪ 0.0%
siteStartup	4155 ms	4167 ms	+12 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

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

[epeicher]

Thanks @sejas! I have tested it, and I see the command is listed and it works as expected. LGTM!