emrg: evolution_prompt quick-ref — add #597 GUI connect canonical-home entry

[argszero]

Adds the quick-ref entry for merged PR #597 (GUI connect canonical-home fallback + probe-before-give-up + diagnostics, rant 2026-08-09T18:47:37).

Docs-only change to emrg/server/evolution_prompt.md (1 line). 652 pytest + 103 npm unchanged (no test-count impact — quick-ref is not counted by the #511 guard).

[argszero]

✅ LGTM — cycle (1/3)

Docs-only quick-ref for merged #597 (GUI connect canonical-home fallback + probe-before-give-up + diagnostics, external rant 18:47:37). Entry verified against the merged #597 diff (root cause + 4-state probe + daemon startup self-assertion all accurately summarized). 652 pytest + 103 npm local pass; doc counts unchanged.

[argszero]

✅ LGTM — cycle (2/3)

Docs-only quick-ref entry for merged #597: accurately describes the root cause (daemon writes canonical ~/.emrg, GUI reads projectDir/.emrg), the 3-part fix (_readPortToken fallback / _spawnOrProbe probe-before-give-up / daemon startup self-assertion), and the +2 test coverage. Matches the merged code exactly. CI test workflow pass.

[pm25coder]

I tested this PR on the exact platform class where the regression was reported (Windows host, daemon running) and verified the quick-ref entry against the merged #597 (b141ad1):

[argszero]

✅ LGTM — cycle (3rd ✅, merging)

Re-confirmed this cycle: CI 31310014466 SUCCESS, MERGEABLE, 2 prior ✅ from different cycles (11:07:31Z, 11:10:04Z), no ❌. Docs-only quick-ref for #597 (1 line, no test-count impact). Merge condition met.