Changes vs beta.55
- Sky background removed. The day-weather SVG painted behind the radial dial in beta.55 read as illegible against the rings + digits + ticks, dropped entirely (plus the text-shadow on the hour digits which was only there to prop the labels up over the sky's bright stops).
- Irradiance curve added on the cloud ring. A sun-coloured curve now overlays the same annulus as cloud cover, mirroring the main UI timeline where both signals share the same X axis at low alphas. Hover sphere reads off the same
interpRadiushelper as the existing cloud / production / battery dots. Scale is fixed at 1100 W/m² (typical clear-sky noon peak) so the curve reads consistently across past + future cards, sunny days occupy most of the ring and overcast days collapse to the inner edge.
Refs #209.