sl-webui
fc26226368
Real-time battery history visualization with: - Subscribes to /saltybot/battery_state for continuous battery data - Rolling 30-minute history window with automatic data culling - Dual-axis line chart: voltage (left, cyan) and percentage (right, amber) - Canvas-based rendering for performance - Charge/discharge rate calculation (last 5-minute average): * Voltage rate in mV/min with up/down/stable indicator * Percentage rate in %/min with up/down/stable indicator - Grid overlay, axis labels, time labels, and legend - Current stats display: voltage, percentage, rates - Responsive canvas sizing Integrated into TELEMETRY tab group as 'Battery History' tab. Follows established canvas rendering and data subscription patterns. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>