Learn_System

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Author	SHA1	Message	Date
Maxim Dolgolyov	50ecb6463a	feat(admin/health): System Health Level 1 — живой мониторинг + вердикт getHealth обогащён: вердикт здоровья (ok/warning/critical) по порогам (память %, диск, ошибки/24ч, лаг event-loop, размер БД) + причины; реальный % памяти, лаг event-loop (perf_hooks), load average, свободное место на диске (statfs), PID/NODE_ENV, версия+git-commit, число активных SSE-соединений, размер WAL, разбивка БД по крупнейшим таблицам. sse.js: экспорт stats() (онлайн-пользователи/гости/соединения). admin.js loadHealth: светофор-баннер вердикта с причинами, тумблер авто-обновления (live, поллинг 5с с самоостановкой при уходе с вкладки), 8 карточек (uptime/БД/файлы/ошибки/SSE/память/event-loop/диск), панели платформы и активности, горизонтальные бары крупнейших таблиц БД. Проверено: getHealth собирает полный payload, вердикт срабатывает (диск<2ГБ → warning), NaN-лаг защищён. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-05-30 18:03:57 +03:00
Maxim Dolgolyov	fd29acbbdd	feat: WebSocket real-time + rAF render gate + guest board + screen picker 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>	2026-04-13 18:04:59 +03:00
Maxim Dolgolyov	be4d43105e	LearnSpace: full-stack educational whiteboard platform Node.js/Express backend + vanilla JS frontend. Features: real-time collaborative whiteboard (SSE), multi-page support, LaTeX formulas, shapes/connectors, coordinate systems, number lines, compass, zoom/pan, Catmull-Rom pencil smoothing, ruler/protractor with rotation & resize controls, minimap navigation overlay, auto-measurements, multi-page thumbnails sidebar, PNG export, page templates. Student/teacher workflows: classes, assignments, library, dashboard. Mobile responsive. SQLite (better-sqlite3). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-04-12 10:10:37 +03:00

Author

SHA1

Message

Date

Maxim Dolgolyov

50ecb6463a

feat(admin/health): System Health Level 1 — живой мониторинг + вердикт

getHealth обогащён: вердикт здоровья (ok/warning/critical) по порогам
(память %, диск, ошибки/24ч, лаг event-loop, размер БД) + причины; реальный
% памяти, лаг event-loop (perf_hooks), load average, свободное место на диске
(statfs), PID/NODE_ENV, версия+git-commit, число активных SSE-соединений,
размер WAL, разбивка БД по крупнейшим таблицам.

sse.js: экспорт stats() (онлайн-пользователи/гости/соединения).

admin.js loadHealth: светофор-баннер вердикта с причинами, тумблер
авто-обновления (live, поллинг 5с с самоостановкой при уходе с вкладки),
8 карточек (uptime/БД/файлы/ошибки/SSE/память/event-loop/диск), панели
платформы и активности, горизонтальные бары крупнейших таблиц БД.

Проверено: getHealth собирает полный payload, вердикт срабатывает (диск<2ГБ
→ warning), NaN-лаг защищён.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-05-30 18:03:57 +03:00

Maxim Dolgolyov

fd29acbbdd

feat: WebSocket real-time + rAF render gate + guest board + screen picker

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>

2026-04-13 18:04:59 +03:00

Maxim Dolgolyov

be4d43105e

LearnSpace: full-stack educational whiteboard platform

Node.js/Express backend + vanilla JS frontend.
Features: real-time collaborative whiteboard (SSE), multi-page support,
LaTeX formulas, shapes/connectors, coordinate systems, number lines,
compass, zoom/pan, Catmull-Rom pencil smoothing, ruler/protractor with
rotation & resize controls, minimap navigation overlay, auto-measurements,
multi-page thumbnails sidebar, PNG export, page templates.
Student/teacher workflows: classes, assignments, library, dashboard.
Mobile responsive. SQLite (better-sqlite3).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-04-12 10:10:37 +03:00

3 Commits