Output Level Meter

A module's output meter with its gain control on it: pixel-aligned LED bars, one per channel (L/R when the host measures them, one merged bar otherwise), hardware green/amber/red zones, a peak-hold segment and a latched clip light, with a triangle under the bars that sets the linear output gain on the meter's own dB scale. Levels paint straight to the DOM, so a 30 Hz meter feed never re-renders the bars.