test: simplify how the CLI is built for tests

[angeloashmore]

Resolves:

Description

We now more efficiently build the CLI before running tests. cross-env and concurrently are replaced by a Vitest hook, where we call tsdown's build function instead.

We also remove a test-specific ternary from the code, ensuring we are testing the real public CLI.

Checklist

• A comprehensive Linear ticket, providing sufficient context and details to facilitate the review of the PR, is linked to the PR.
• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

Preview

How to QA ¹

Run node --run unit — the suite builds the CLI itself and all 288 tests pass in ~80s. For watch mode, run node --run unit:watch, edit a file in src/, and confirm the CLI rebuilds and tests rerun.

🤖 Generated with Claude Code

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Note

Low Risk
Changes are limited to dev/test tooling and a documented env override for sync poll interval; no auth or production behavior changes beyond removing unused env flags.

Overview
Test runs now build the CLI inside Vitest instead of pre-building via unit scripts with cross-env and concurrently. Global setup calls tsdown with an unminified, unbundled test config, rebuilds on reruns (watch), and forceRerunTriggers watch src/** rather than dist/index.mjs. unit / unit:watch are plain vitest run / vitest watch; concurrently and cross-env are removed from devDependencies.

Production build config is simplified: tsdown always minifies and no longer injects MODE / DEV / TEST—only PROD remains. Matching fields are dropped from env parsing.

prismic sync polling no longer branches on a compile-time test flag. It uses optional PRISMIC_SYNC_POLL_MS (default 5000); E2E harness sets 500 for faster sync tests.

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