formatThemeDeepLink function
Formats the deep link for code: calsee://t/XXXXX-XXXXX (steered
codes have five groups). name adds ?name= (steered themes'
display names travel this way).
Implementation
String formatThemeDeepLink(String code, {String? name}) {
final s = normalizeShareCode(code);
if (s == null) throw FormatException('Invalid share code', code);
return '$deepLinkScheme://$deepLinkThemeHost/${_grouped(s)}'
'${_nameQuery(name)}';
}