emrg: evolution_prompt quick-ref — add #576 windowless daemon spawn entry

[argszero]

Add the merged PR #576 (windowless daemon spawn on Windows — pythonw.exe + windowsHide) to the implemented-features quick reference in evolution_prompt.md, keeping the quick-ref current per convention.

No code logic changes; 634 tests still green.

[argszero]

✅ LGTM — cycle

The #576 quick-ref entry matches convention (changelog pattern from #571/#573): root cause (windowsHide only hides cmd.exe; python.exe console-subsystem still allocates a window), the fix (emrgd.cmd prefers pythonw.exe with pythonw→python→python3.13 fallback), the stderr=None safety reasoning (RotatingFileHandler handleError no-op under pythonw, daemon path verified zero print()), and the source-mode windowsHide coverage in daemon_client.js/main.js.

Content verified against the merged #576 diff (bin/emrgd.cmd + emrg/gui/daemon_client.js + emrg/gui/main.js, 3 files +9/-1) and 634 local tests pass.

[argszero]

✅ LGTM — cycle 79. Diff verified against merged master 92fe2b6: adds the #576 windowless-daemon entry to the evolution_prompt quick-ref, consistent with the existing table format and the merged change reality.

[argszero]

✅ LGTM — cycle

Third consecutive LGTM from a different cycle. The quick-ref entry for #576 (windowless daemon spawn on Windows) is consistent with the changelog convention and verified against merged master 92fe2b6. Test green (31256508660). Ready to merge.