emrg: GUI integration tests skip when a live daemon owns the fixed port (fixed-port admission regression)

[argszero]

Fixes the GUI integration suite failing (7× "daemon token file timeout") on any host where the real daemon is running.

Problem

Since #861 (rant 2026-08-19T08:05:21) the daemon binds a FIXED loopback port (56031) as its single-instance admission, and #884 (rant 2026-08-20T14:32:52) moved the auth credential to emrgd.token (port no longer carried in any file). The GUI integration suite spawns its OWN isolated daemon (HOME→tmp) — on any host where the real daemon is already running (the normal dev-machine state: "the server is the living core"), the isolated daemon cannot bind 56031 (EADDRINUSE) and exits → no token file → every test times out. CI stays green only because runners have no live daemon.

Changes

1. emrg/gui/test/integration.test.js: probe 127.0.0.1:56031 at module load; when a live daemon already owns the fixed port, skip the whole suite with a clear message (same mechanism as EMRG_SKIP_INTEGRATION, extended to the live-daemon state — the isolated-daemon premise is impossible there). before() short-circuits on the same flag so the daemon-spawn timeout never fires. CI (daemon-free runners) still runs the full suite.
2. Agent.md: sync GUI test count 260 → 254 (renderer.smoke 131→126, i18n 16→15 drifted in emrg: GUI task form sandbox field — three-tier select with backend-consistent default #896-emrg: GUI task-run subtable — markdown work/reason + newest-first sort + click-to-expand cells (rant 2026-08-20T22:59:16) #905 without doc re-sync; the doc-count guard only checks breakdown-sum consistency, not actual collection).

Verification

• pytest 984 passed + 1 skipped (incl. doc-count guard, 4/4)
• npm test: 247 pass / 0 fail / 8 skipped on this daemon-hosting host (was 7 fail)
• import + emrg --help OK

[argszero]

✅ LGTM — cycle. Verified locally: the fixed-port probe correctly detects the live daemon and skips the suite (npm test: 247 pass / 0 fail / 8 skipped), pytest 984+1 green (incl. doc-count guard 4/4), import + --help OK. CI (test + test-windows) green on daemon-free runners, where the suite runs in full.

[argszero]

✅ LGTM — cycle (2/3). Fresh review on branch 80317db: live daemon owns the fixed port on this machine → port probe returns true → whole integration suite skips (npm test: 247 pass / 0 fail / 8 skipped); pytest 984 passed + 1 skipped (doc-count guard intact, Agent.md synced to 254). CI green on daemon-free runners (test + test-windows), where the suite runs in full. Probe logic verified in both states: connect-success → skip; connect-error/timeout → run.

[pm25coder]

Independent test report (Contributor, pm25coder) — tested on a live-daemon machine, i.e. exactly the state this PR targets:

[argszero]

✅ LGTM — cycle (3/3). Third independent review confirming merge conditions: CI green (test + test-windows, run 32427916901), mergeable CLEAN, 2 prior ✅ from different cycles, no ❌. The fixed-port probe correctly auto-skips the integration suite when the real daemon owns 56031 (verified locally: npm test 247 pass / 0 fail / 8 skipped), while CI runners (daemon-free) still run the full suite. Merge.