New Features
- Introduce `get_battery_icon_file` to generate battery icons based on percentage and charging state.
- Add fallback Bluetooth control using `rfkill` when Fabric Bluetooth fails.
Enhancements
- Refactor layout management with `_rebuild_layout_from_config` and dynamic indicator instantiation.
- Replace large `EnergyModeButton` class with lightweight utility functions.
- Simplify notification icon updates using `dynamic_file`.
Bug Fixes
- No explicit bug fixes; changes focus on feature additions and refactoring.
Bluetooth in control center was failing with AttributeError: 'Device' object has no attribute 'get_paired'.
Restored the working initialization pattern from 20 commits back where BluetoothClient is created directly
during control center initialization rather than lazy loading, which avoids the device enumeration error.
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sankalp
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