2026.8.0-b0

Consumption ring reworked around monitoring groups: assign every HA energy dashboard device to a group, then drill into a group (3D card-flip on the 0h-12h axis) to inspect its entities. Fixed centre disc with the Helios mark / group exit button and a multi-colour production-zone glow, per-entity hover breakdown with the solar / grid / battery split, and peak-hour markers. Closes #281.