Final-pass review found two doc misses:
(1) docs/systems/desktop.md had a SECOND 'Icon Generation' section
under Build System (separate from the Tray Icon section that Task 9
updated) that still described the deleted scripts/gen-icns.sh —
sips/iconutil pipeline using present tense. Replaced with an accurate
description of the new SVG-driven scripts/gen-icons.mjs pipeline,
including the dev-time Electron Resources cp note and links to the
spec and generator README.
(2) The icon-system spec's 'Files Deleted' table only listed
/icon.png and gen-icns.sh; tray-icon@2x.png was deleted in Task 8 but
not documented. Added with the Cocoa-template-only rationale.
Doc-only fix; no code changes.