(new): rich message support

(fix): runtime reliability
(tests): regression coverage
(doc): v1.1 release notes

utils.go

@@ -8,7 +8,9 @@ import (
 )
 
 // Ptr returns a pointer to v.
-func Ptr[T any](v T) *T { return &v }
+//
+//go:fix inline
+func Ptr[T any](v T) *T { return new(v) }
 
 // Val returns dereferenced pointer value or def when p is nil.
 func Val[T any](p *T, def T) T {
@@ -36,5 +38,5 @@ func generateToken(b int) (string, error) {
 	if _, err := rand.Read(bytes); err != nil {
 		return "", err
 	}
-	return base64.URLEncoding.EncodeToString(bytes), nil
+	return base64.RawURLEncoding.EncodeToString(bytes), nil
 }