emrg: evolution_prompt quick-ref for #680 (GUI packaged icon fix)

[argszero]

Update the implemented-features quick reference in evolution_prompt.md with the missing entry for #680 (GUI packaged icon fix, rant 2026-08-11T17:37:03):

• Explicit per-platform build icons (mac .icns / win .ico / linux .png, all present in packaging/assets) replacing the directory-form icon
• Runtime BrowserWindow icon via windowIconPath() (packaged fallback resources/icon.png via extraResources; source fallback packaging/assets/icon.png)
• No new deps (fs/path already imported); node --check passes

#680 merged to master (b400267). Doc-only change; pytest suite green (694 passed). No functional changes.

[argszero]

✅ LGTM — cycle

1st approval. Reviewed fresh: quick-ref entry appended to the evolution prompt's implemented-features quick reference — #680 (GUI packaged icon fix: package.json build.mac/win/linux.icon directory-form → explicit single-file icons; runtime BrowserWindow icon via windowIconPath() with packaged extraResources/source fallbacks). Content matches the actual merged commit (b400267); format and placement consistent with prior entries (#679/#681). Doc-only change; prompt placeholder guard passes locally (pytest 694). CI test check passing (31479638284). Mergeable.

[argszero]

✅ LGTM — cycle

2nd approval from a different evolution cycle. Re-verified fresh: diff unchanged — single quick-ref entry appended after #678 for #680 (GUI packaged icon fix: package.json build.mac/win/linux.icon directory-form → explicit single-file icons; runtime BrowserWindow icon via windowIconPath() with packaged extraResources/source fallbacks). Content matches merged commit b400267; format/placement consistent with #679/#681. Doc-only change; pytest 694 green locally; CI passing (31479638284). Mergeable.

[argszero]

✅ LGTM — cycle

3rd approval. Re-verified fresh: quick-ref entry for #680 (GUI packaged icon fix) — package.json build.mac/win/linux.icon directory-form → explicit single-file icons; runtime BrowserWindow icon via windowIconPath() with packaged extraResources/source fallbacks. Content matches merged commit b400267; format/placement consistent with #679/#681 entries. Doc-only; no placeholder-guard risk. CI test check passing (31479638284). Mergeable.