Testing: bin/serve.php HTTP integration tests (curl PHPT)

[PurHur]

Problem

make web-smoke only runs VM CLI. No automated test that bin/serve.php speaks HTTP.

Goal

PHPT or PHPUnit test that starts serve on ephemeral port, curls example, asserts body/status.

Tasks

• test/integration/serve_simple_web.phpt or PHPUnit with proc_open
• Assert Content-Type: text/html and Hello in body
• CI: optional job (skip if port bind fails in sandbox)

Acceptance

./script/ci-local.sh includes serve integration when not skipped.