emrg: deprecate emrgd.pid/emrgd.port in uninstaller (fixed-port + token ground truth)

[argszero]

Summary

Fully deprecate ~/.emrg/emrgd.pid / ~/.emrg/emrgd.port in the uninstaller (bin/emrg-uninstall), matching the daemon's long-standing behavior (host feedback 2026-08-25 18:46: the daemon no longer writes or reads these files).

Changes

• bin/emrg-uninstall — stop_daemon() rewrite:
  • Removed PORT_FILE / PID_FILE constants; the daemon is now identified solely by:
    • the fixed port 56031 (ground truth for daemon liveness, rant 2026-08-19T08:05:21), and
    • the token read from the single-line emrgd.token file (rant 2026-08-20T14:32:52).
  • Shutdown order: ① WebSocket protocol shutdown on the fixed port → ② command-line scan for -m emrg.server processes (ps / wmic+CIM) with SIGTERM/taskkill — the only remaining reliable identity marker, same semantics as emrg._stop_all.stop_daemon (rant 2026-08-17T17:03:38).
  • Port-close polling (≤5s) after SIGTERM confirms the daemon actually exited.
  • WHITELIST retains emrgd.pid/emrgd.port filenames only to clean up legacy residue from old installs during uninstall — never created or read.
• packaging/make-installer.sh — comment update only: documents the fixed-port + token ground truth (emrgd.pid deprecated).

Verification

• Local pytest: 1063 passed, 1 skipped
• python -c "from emrg.client.app import run_client" OK; python -m emrg --help OK
• Logic verified in positive (protocol-shutdown → cmdline-scan fallback with port-poll) and negative (no pids → token cleanup, graceful message) states
• emrg/server/daemon.py confirmed to no longer write/read emrgd.pid/emrgd.port (only a docstring mention remains); ~/.emrg/ contains only emrgd.token today

Notes

• This work was authored by a parallel evolution instance at 18:48 and left uncommitted; this cycle adopted it after confirming it had been static >10 minutes and no PR/branch existed. The fix is consistent with the daemon's current state.

[argszero]

✅ LGTM — cycle 20260825-190924. CI: test + test-windows both pass. Verified stop_daemon logic in both states (protocol shutdown → cmdline-scan fallback with port-poll; no-pids → token cleanup); daemon confirmed to no longer write/read emrgd.pid/emrgd.port; full local suite 1071 passed/1 skipped + import + CLI OK. Consistent with emrg._stop_all semantics.

[argszero]

✅ LGTM — cycle 20260825-192404. CI green (test + test-windows). Re-verified stop_daemon in both states (protocol shutdown → cmdline-scan fallback + port poll; no-pids → token cleanup) and daemon consistency (no emrgd.pid/port reads remain). Local suite green.

[argszero]

✅ LGTM — cycle 20260825-193548 (3rd consecutive LGTM: 190924, 192404, 193548; no ❌ between). CI green (test + test-windows). PR remains limited to bin/emrg-uninstall + packaging/make-installer.sh — no daemon pid/port reads remain (verified ~/.emrg has only emrgd.token; daemon.py only docstring mention). Merge condition met.