v1.55.1

Fixed

• The metrics chart could label its scale with impossible values — a CPU or memory graph showed a negative percentage at the bottom of the axis, and would have gone above 100% at the top. The scale is now kept within what each metric can actually read: percentages stay between 0 and 100, fan speed and voltage never go below zero, and temperature can still show below zero for outdoor devices. The graph line and the min/max/avg figures were always correct — only the scale labels were wrong.