Problem

The gauge_demo.py example has two issues observed on hardware:

1. Readability: the value text inside the gauge uses scale=2 bold effect which is hard to read on the SSD1327 (related to fix(steami_screen): Improve text scaling beyond bold offset effect. #369)
2. Reactivity: the arc rendering is slow due to the oversampled _draw_arc() which draws many line segments per frame. The gauge update feels sluggish when moving an object in front of the VL53L1X.

Possible improvements

• Reduce arc oversampling in _draw_arc() for a speed/quality tradeoff
• Display value with screen.text() at scale=1 instead of scale=2 for readability
• Increase the sleep interval to match the actual frame rate (avoid queuing frames)
• Consider a partial redraw strategy (only redraw the arc delta, not the whole screen)

Observed on

STeaMi Rev A, SSD1327 OLED, VL53L1X distance sensor.