[codex] Update compute previews for AI and main

[sorenbs]

Summary

• Deploy Compute previews on pushes to main, using the stable main service name so the latest default-branch preview keeps a stable URL.
• Pass preview AI runtime configuration through a temporary Compute CLI env file, including ANTHROPIC_API_KEY, STUDIO_DEMO_AI_ENABLED=true, and STUDIO_DEMO_PORT.
• Document the new preview behavior and add focused tests for the deploy args, AI env payload, and workflow trigger coverage.

Validation

• pnpm exec vitest run scripts/compute-preview/compute-preview-utils.test.ts
• node --check scripts/compute-preview/compute-preview-deploy.mjs && node --check scripts/compute-preview/compute-preview-utils.mjs
• pnpm typecheck

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 91d43bdb-f0d8-4961-b203-398f4f72f6e7

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/stable-main-compute-preview

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch codex/stable-main-compute-preview

---

_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

🖥️ Preview: https://cmqzm6mu10q0y15e1cyh60fwb.cdg.prisma.build