Integrate FormatterModifier into the validation message modifier chain,
enabling StringFormatter formatters to be used as pipe modifiers in
message templates (e.g., {{input|uppercase}}, {{input|mask:1-4:X}}).
This requires bumping respect/string-formatter to ^1.7.
Add feature tests for both the Formatted validator (uppercase, lowercase,
trim, number, date, creditCard, secureCreditCard, chained formatters) and
the FormatterModifier in templates (all major formatters, custom parameters,
multi-argument modifiers, and chained modifiers).
Assisted-by: Claude Code (Claude Opus 4.6)
The Formatted validator decorates another validator to transform how
input values appear in error messages, while still validating the
original unmodified input.
This is useful for improving the readability of error messages by
displaying values in a user-friendly formatd.
The validator accepts any Respect\StringFormatter\Formatter implementation,
allowing direct use of StringFormatter's fluent builder. As StringFormatter
expands with more formatters in future releases, users will automatically
benefit from the full range of formatting options.
Assisted-by: Claude Code (Opus 4.5)
