Remove one-time sync guards (initialPowerSync, initialSpeedSync) so heater power and stirrer speed sliders track the server's ist readbacks on every push, not just on first connect. Also remove the zero-out on sud stop/pause: with continuous ist tracking the animation and slider always agree, and the zero-out caused them to diverge when the server kept sending non-zero values during a pause. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SH2D4LRuCnhLSzoYerAfJX