errorRate приходит из API уже в процентах (SUM(is_correct=0)*100/COUNT в analyticsController),
а фронт умножал ещё раз на 100 → 4130%. Убрал лишнее ×100; заодно корректно работают пороги
цвета (>=35 / >=60).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Зафиксирована накопленная незакоммиченная работа рабочего дерева, КРОМЕ файлов
учебника «Химия 7» (migration 046, chemistry_7_*.html, chem7_svg.js, тест —
оставлены незакоммиченными по запросу).
Включает: модуль биохимии (ядро BIO, 3D VSEPR, химдвижок, баланс, challenges,
пути из БД), System Health Level 1 (вердикт/мониторинг), а также frontend-
страницы и lab/textbooks-правки параллельной сессии.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- Add js/sidebar.js: generates full sidebar HTML into #app-sidebar,
handles role-based visibility, active link (with prefix matching),
toggle wiring, collapsed state, board/features/notif init
- Replace <aside class="sidebar">...</aside> with <aside id="app-sidebar">
across all 35 standard-layout pages via scripts/apply-sidebar.js
- Add notifications.js to 5 pages that were missing it
- Fix api.js initPage(): skip toggle re-wiring if data-sb-wired set,
fix active link selector .sb-item → .sb-link
- Remove stale sbl-*/nav-admin/btn-upload-nav getElementById calls
that crashed after sidebar replacement (lab, classes, collection,
crossword, hangman, knowledge-map, library, pet, profile)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Classroom performance:
- WebSocket server (ws-server.js) for low-latency cursor & stroke preview
Replaces HTTP POST per event → eliminates per-message auth overhead
Session member cache (30s TTL) avoids SQLite query per WS message
Fallback to HTTP POST when WS not connected
- Cursor throttle reduced 100ms → 33ms (~30fps)
- Stroke preview throttle reduced 50ms → 20ms
- whiteboard.js: render() is now rAF-gated (_doRender/_rafPending)
Multiple render() calls within one frame collapse into one repaint
document.hidden check — zero CPU when tab is in background
visibilitychange listener restores canvas on tab focus
Guest board:
- guestClassroom.js route: public token-based read-only access
- guest-board.html: name entry + read-only whiteboard + SSE
- SSE: addGuestClient/removeGuestClient/emitToGuests
Screen share picker:
- Discord-style modal with tab switching (screen/window/tab)
- Live video preview before confirming share
- useExistingScreenStream() in ClassroomRTC
Fullscreen exit overlay:
- #cr-fs-exit-overlay button inside cr-board-wrap
- Visible only via CSS :fullscreen selector (touchpad users)
File sharing from library:
- Teacher picks file from library, sends as styled card in chat
- crDownloadLibraryFile() fetches with Bearer auth
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Maxim Dolgolyov