Email format pattern, exported as a named const so callers that need a
guaranteed RegExp (rather than the RegExp | undefined shape of
FORMAT_PATTERNS[name] under noUncheckedIndexedAccess) can import it
directly. Used by the URI safety helpers for mailto address checks.
Email format pattern, exported as a named const so callers that need a guaranteed
RegExp(rather than theRegExp | undefinedshape ofFORMAT_PATTERNS[name]undernoUncheckedIndexedAccess) can import it directly. Used by the URI safety helpers for mailto address checks.