Function formatSecurityLevel

formatSecurityLevel(level: string | null | undefined): string
Format security level string to the standardized format

Normalizes security level strings to match the SecurityLevel enum values, handling case variations and trimming whitespace. Essential for ensuring consistent level representation across the application.
Parameters
- level: string | null | undefined
  Security level string to format
Returns string
Formatted security level matching SecurityLevel enum
Example
```
formatSecurityLevel('high')        // 'High'
formatSecurityLevel('VERY HIGH')   // 'Very High'
formatSecurityLevel('  low  ')     // 'Low'
formatSecurityLevel(null)          // 'None'
formatSecurityLevel(undefined)     // 'None'
formatSecurityLevel('invalid')     // 'None' (defaults to None)
```
- Defined in utils/widgetHelpers.ts:46