Add test suite, E2E tests, and CI for live-reload

[knobo]

Summary

Adds a real automated test suite, end-to-end browser/protocol tests, and CI to the live-reload server — plus fixes uncovered along the way. No production .lisp behavior was changed; this is tests + tooling + bug fixes in tests.

The work was developed in parallel across isolated git worktrees, then integrated and verified end-to-end against a real running server.

What's included

FiveAM unit suite (live-reload-test.asd, t/test-live-reload.lisp)

• New separate ASDF system live-reload-test (:depends-on ("live-reload" "fiveam")) so it never interferes with the main system. (asdf:test-system :live-reload-test) signals failure on a failing run.
• 19 tests / 36 checks, 100% pass. Covers:
  • send-update-url — exact reload-command JSON format, verbatim url, broadcast to N clients, zero-client no-op
  • add / stop — the inotify mailbox protocol
  • add-file-to-listener — *files* pushnew semantics against a real inotify handle
  • mlcar macro
  • the LiveReload v7 hello handshake string
  • the Lack middleware — wrapper is callable, pathname results get registered for watching via add, non-pathname results pass through unchanged
• Every test rebinds the relevant specials with let so global state is never polluted; no sockets or OS threads are started.

Playwright E2E + WebSocket protocol test (t/e2e/, package.json)

• A fast, browser-free WebSocket protocol smoke test (ws.spec.js): boots the real Lisp server, performs the v7 handshake, changes a watched file on disk, and asserts a {"command":"reload",...} broadcast arrives. Verified passing against a live server.
• A full Chromium reload test (reload.spec.js): loads the served page and asserts the browser actually reloads when a watched file changes.
• t/e2e/server.ros launcher, Playwright config, fixtures, and t/e2e/README.md with prerequisites.

CI (.github/workflows/ci.yml)

• lisp-tests: installs libfixposix-dev + build-essential (required — inotify → iolib grovel needs lfp.h), sets up Roswell/Quicklisp, loads live-reload, and runs the FiveAM suite with proper non-zero-on-failure exit semantics. Caches Roswell/Quicklisp.
• node-tests: existence-guarded npm + node --check for the E2E tooling and client script.

Bug fixes found while wiring it up

• Tests referenced the internal symbol live-reload-ws::*live-reload-hello-string* with a single colon, causing a READ error during COMPILE-FILE so the test system never compiled. Fixed all references.
• The middleware tests booted Hunchentoot on port 35729 via ensure-running when the wrapper was built, leaking a listening socket after the suite finished. Replaced with three hermetic tests behind a with-stubbed-ensure-running macro — no server, no socket — that also verify the middleware's real watch-registration behavior.
• .gitignore extended to cover ASDF fasl build artifacts, qlot, and .claude/ agent-artifact data.

Verification (run locally against a real server)

system load            : OK
FiveAM unit suite      : 36 checks, Pass 36 (100%), Fail 0   (exit 0), no socket bound
Playwright WS E2E      : 1 passed                            (exit 0)

Note for reviewers / prerequisites

Running the Lisp tests locally requires libfixposix (sudo apt-get install -y libfixposix-dev build-essential) because inotify → iolib greps lfp.h at build time. CI installs this automatically. For the E2E browser test: npm install && npx playwright install chromium.