test: web component tests, opt-in e2e, and OpenAPI drift guard

[nicholasadamou]

Final follow-up PR — the Quality & DX batch (#13–#15). Completes all four improvement batches.

Web component/integration tests (#13)

• App — auth gate (dashboard vs login on 401), launch flow, and the pull-images action, with a mocked client (real AirlockApiError preserved for instanceof).
• SessionList — open/extend/terminate handlers, in-progress button states, live countdown, and copy-to-clipboard.
• SessionViewer — stream embed, per-session password surfacing, back/reload behavior.
• Fixed a latent leak: CopyLinkButton now clears its reset timer on unmount.

Opt-in real-container e2e (#14)

apps/api/src/__tests__/e2e.docker.test.ts drives a real Docker engine through ping → create → list → extend → stop. Gated on AIRLOCK_E2E=1, so normal CI skips it (verified: 2 skipped). Documented in development.md (the first run pulls a large Kasm image; point AIRLOCK_IMAGE_CHROMIUM at a pre-pulled tag to skip).

OpenAPI drift guard (#15)

openapi-sync.test.ts asserts docs/openapi.yaml stays in sync with the code's browser catalog (BROWSER_KINDS), TTL bounds (TTL_MIN/MAX_SECONDS), and route table — so the spec can't silently drift. (A lighter, dependency-free guard than full zod→OpenAPI generation; noted as the pragmatic choice.)

Verification

• make check green: format, lint, typecheck, 112 tests (84 api + 2 skipped e2e, 28 web), build.
• No React act warnings; e2e skipped in CI.

With this, all four batches from the improvement review (Security & isolation, Reliability/ops, Features & UX, Quality & DX) are delivered.

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Run ID: a8ea049c-daa0-4744-873e-373b9a29d5e5

📥 Commits

Reviewing files that changed from the base of the PR and between 6d09dff and 060d499.

⛔ Files ignored due to path filters (1)

• bun.lock is excluded by !**/*.lock

📒 Files selected for processing (8)

• apps/api/package.json
• apps/api/src/__tests__/e2e.docker.test.ts
• apps/api/src/__tests__/openapi-sync.test.ts
• apps/web/src/App.test.tsx
• apps/web/src/components/SessionList.test.tsx
• apps/web/src/components/SessionList.tsx
• apps/web/src/components/SessionViewer.test.tsx
• docs/development.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/quality-dx

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