9cb9045f87
Recording now uses the browser's hardware video encoder: - JPEG frames drawn to offscreen canvas → canvas.captureStream(30fps) - MediaRecorder encodes to MP4 (preferred) or WebM (fallback) - Stop triggers download of standard video file Playback uses native <video> element — no custom parsing needed. Massively simplified: removed packFrames/unpackFrames, no more custom binary format.