What changed

• Battery levels on device cards are now shown as animated circular progress rings around each pod icon instead of flat horizontal bars.
• Rings are color-coded by charge level: normal above 30%, warning between 15-30%, critical below 15%, and a neutral empty track when the level is unknown.
• Device cards use an elevated card style with status chips and a compact signal strength badge.

Technical Context

• Introduces shared UI components (BatteryCapsule, StatusChip, SignalBadge, DebugSection) intended for reuse across device-related screens.
• Cards use ElevatedCard with tonal Surface grouping; status items use FlowRow for responsive wrapping.
• Battery ring animation uses Compose animateFloatAsState for smooth transitions when values update.