no issue
- `{{format-number}}` was showing "0" when passed in an empty/nullish string when it should have been showing nothing
- used `{{if-empty}}` to fix capitalisation when the member count is missing
- previously attempted a CSS-only fix with `:first-letter` and `text-transform: uppercase` but that broke the layout in Safari
no issue
- added `format-number` helper that uses browser's built-in `toLocaleString()` method to format numbers such as adding commas or periods to improve number readability (`123,000` instead of `123000`)
- updated members chart totals to use the helper
- replaced direct `.toLocaleString()` usage with the new helper so we can change global number formatting if needed