Add Playwright e2e smoke and /api/subscribe verify check

[lwwmanning]

Summary

Adds a Playwright browser smoke suite (Chromium desktop + WebKit-iPhone-13 mobile) plus a new /api/subscribe assertion in scripts/verify.ts. Together they cover the rendering and behavioral surface that HTTP-only and Lighthouse audits can't see.

Playwright surface (tests/smoke.spec.ts, 8 tests × 2 projects):

• home — hero copy text visible (overlay), <title> matches, <canvas> attaches to the DOM after hydration (skipped automatically when the browser doesn't support WebGL — headless WebKit on Linux often doesn't, Chromium has SwiftShader fallback so it runs there).
• blog index — links to a published post (seed slug discovered at beforeAll from the rendered /blog HTML; entire describe skipped if no published posts).
• blog post — <h1> visible, and figure[data-rehype-pretty-code-figure] with [data-line] children (asserts the rehype plugin actually tokenized the code block, not a fallback <pre>).
• mobile layout — runs at iPhone-13 viewport in the mobile project and at 375×812 in the desktop project; asserts scrollWidth ≤ clientWidth on / and /blog/<seed> (no horizontal-scroll regressions).

Verify check (scripts/verify.ts → checkSubscribe()):

• POSTs to /api/subscribe with a synthetic email; asserts the route returns 503 { error: "Subscription service is not configured" } when RESEND_API_KEY is unset.
• Catches a regression where someone moves new Resend(...) from inside the request handler to module scope, or removes the env-gate. Both would change the failure mode (build-time crash or 5xx at runtime).
• Skips gracefully when RESEND_API_KEY is set in the verify shell, rather than calling the real Resend API.

CI integration (.github/workflows/ci.yml):

• Reorders the existing chain so the dev server stays alive through Playwright, with the audit + Playwright steps slotted between Verify endpoints and Stop server (always).
• Caches Playwright browsers (~250 MB) keyed on the @playwright/test version pinned in package.json — invalidates on bumps, hits otherwise. Even on a cache hit, system deps (apt) install separately (~10s vs ~3min for the full install).
• On test failure, uploads playwright-report/ as an artifact (7-day retention) so trace files are recoverable.

Other

• package.json — adds test:e2e and test:e2e:install scripts (mirroring the existing lighthouse and verify script style).
• .gitignore — adds /playwright-report/, /playwright/.cache/, /test-results/.

Local verification

$ bun run verify
  ok    /api/subscribe   503 with error="Subscription service is not configured"
  …
  Total: 16 passed, 0 failed

$ bun run test:e2e --project=desktop
  ✓ home › hero copy is visible
  ✓ home › title is correct
  ✓ home › WebGL hero canvas mounts after hydration
  ✓ blog index › links to a published post
  ✓ blog post › post heading renders
  ✓ blog post › rehype-pretty-code syntax highlighting is rendered
  ✓ mobile layout › home has no horizontal scroll
  ✓ mobile layout › blog post page has no horizontal scroll
  8 passed (1.6s)

Test plan

• CI green (Lint, build, verify job runs the full chain end-to-end, including Playwright on both desktop and mobile projects)
• On first PR run the Playwright cache is a miss (~3min for browser install); subsequent runs hit the cache (~10s for system deps only)
• WebGL canvas test runs on desktop (Chromium) and skips on mobile (iPhone 13 / WebKit) without failing the suite
• If a future regression introduces a horizontal-scroll bug on mobile, the suite catches it on / or /blog/<slug>
• Deliberately moving new Resend(...) to module scope locally fails the verify suite at the new /api/subscribe step (or fails the build, depending on the move)

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
vortex	Ready	Preview, Comment	May 4, 2026 7:41pm

[github-actions]

🔦 Lighthouse audit

URL	Perf	A11y	Best practices	SEO	Report
/	🟢 100	🟢 100	🟢 96	🟢 100	report
/blog	🟢 100	🟢 100	🟢 96	🟢 100	report
/blog/btrblocks-compressor	🟢 100	🟢 96	🟢 96	🟢 100	report

Run 25339516475 · 2026-05-04 19:42 UTC