Function formatNumberWithDecimals

formatNumberWithDecimals(value: number, decimalPlaces: number): string
Format a number with specified decimal places

Similar to formatNumber but always returns a string with exact decimal places, without locale-based thousands separators.
Parameters
- value: number
  Number to format
- decimalPlaces: number
  Exact number of decimal places to display
Returns string
Formatted number string with fixed decimals
Example
```
formatNumberWithDecimals(1234.5678, 2)   // "1234.57"
formatNumberWithDecimals(99.5, 3)        // "99.500"
formatNumberWithDecimals(1000, 0)        // "1000"
```
- Defined in utils/formatUtils.ts:246