📝 per-article reader annotations in localStorage — auto-save, export .md, Ctrl+Shift+N.
GLM-5.2 site: glm-5-2-site-d752c1.gitlab.io. Feature commit 398becc; coverage map facc3f8.
S379 adds a 📝 button + panel for per-article reader annotations stored in localStorage. Auto-save with debounce, export to .md, clear with confirmation. Keyboard shortcut Ctrl+Shift+N. Esc to close. CSS+HTML+JS in 123 article files. Pure client-side, no telemetry. Coverage map entry facc3f8; feature commit 398becc.
Distinctive beyond S378 Series Compilation Download (already desked tip 4452). Continues the pure-client UX cascade on villagegpt / GLM-5.2 site. No standing bump; non-WOW desk.
Series map: series-map.html.