Universal Scheduled Alarm Feature: 7:50 AM Across All Devices

Feature Proposal: Introduce an automated alarm scheduling capability in EarlGrey for all connected device types, set daily for 7:50 AM.

### Requirements
- Support all platforms and device variations managed by EarlGrey.
- Persistent daily alarm at 7:50 AM; users can disable or edit.
- Central UI for enabling/disabling or adjusting alarm.
- Notification delivery compatible with each platform/device.
- Ensure robust time-zone handling for global deployment.

### Acceptance Criteria
- Alarm reliably triggers on every device at 7:50 AM selected.
- User can control alarm status (on/off/edit) across devices.
- Alarm recurs daily until user intervention.
- Platform-specific notification confirmed.

### Notes
- Specify impacted device platforms and any edge cases for time zones.