maziggyandClaude Opus 4.5 a7319f0e70 Fix browser freeze on print completion with camera stream open ...

Root cause: When a print completed with the camera stream popup open,
spawning a second ffmpeg process for finish photo capture caused a
conflict that froze the browser tab and video window.

Solution: Buffer the last frame from active camera streams. When
capturing finish photo, use the buffered frame if a stream is active
instead of spawning a new ffmpeg process.

Backend changes:
- camera.py: Added _last_frames buffer and get_buffered_frame() helper
- main.py: Photo capture uses buffered frame when stream is active
- main.py: Moved slow operations to background tasks (energy calc,
  photo capture, smart plug, notifications, maintenance)
- archive.py: Fixed sync file write blocking event loop (asyncio.to_thread)
- printers.py: Added debug endpoint to simulate print completion

Frontend changes:
- useWebSocket.ts: Throttled printer status updates (100ms) to prevent
  UI overload from rapid WebSocket messages
- useWebSocket.ts: Debounced archive invalidations (3s) to prevent
  cascade of re-renders on print completion
- useWebSocket.test.ts: Updated tests for throttled/debounced handlers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-16 18:45:03 +01:00

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bambuddy.service

Fix browser freeze on print completion with camera stream open

2025-12-16 18:45:03 +01:00