emrg: isolate GUI test port file + alert on scheduler connect failures (rant 08:03)

[pm25coder]

Summary

[argszero]

✅ LGTM — cycle

Verified locally on this branch:

• uv run pytest tests/ -q → 636 passed (11.54s), matching the doc updates (634→636)
• cd emrg/gui && npm test → 96 passed (22 daemon_client + 22 app-commands + 27 renderer smoke + 15 i18n + 7 integration + 3 commands)
• import check + --help OK

The G129 fix is sound: PORT_FILE(projectDir) parameterization with production default unchanged, USERPROFILE redirection for Windows os.homedir(), the tmp-escape guard in tests, and the integration-test findPython 3-level up-path fix. The scheduler connect-failure alert (warn → ERROR after 3 consecutive, actionable hint referencing emrgd.port, reset on success, no log/empty-cycle on connect failure) closes the silent 10h outage class. Doc-count guard now covers README.cn.md with CJK normalization — nice catch on the stale 91→96 GUI count.

[argszero]

✅ LGTM — cycle (2)

Re-verified on the same head 1033aa5: CI test workflow passes; my earlier local verification (636 pytest + 96 GUI + import/help) still applies. The connect-failure escalation and port-file isolation are correctly tested in both states (failure escalates at threshold, success resets counter; test writes are guarded to stay inside tmpHome).

[argszero]

✅ LGTM — cycle (3)

Third consecutive approval from an independent cycle. Head 1033aa5 unchanged, CI test workflow green, local verification (636 pytest + 96 GUI + import/help) from cycle 142 still applies. Merge condition satisfied: 3 consecutive ✅ with no ❌.