Function mergeDevicePreviewColors

mergeDevicePreviewColors(
userColors?: Partial<DevicePreviewColors>,
): DevicePreviewColors
Merges user-provided DevicePreview colors with default values.
Parameters
- OptionaluserColors: Partial<DevicePreviewColors>
  Partial colors to merge with defaults
Returns DevicePreviewColors
Complete DevicePreviewColors with all required properties
Example
```
const colors = mergeDevicePreviewColors({
  progressBarLow: '#22c55e',
  progressBarHigh: '#ef4444',
});
// Custom green/red, default yellow for medium
```
- Defined in react-ui/src/device-selector/defaults.ts:312