feat(validation): Add human-readable validation error messages

src/Libs/Request.php

@@ -84,11 +84,11 @@ class Request extends Neuron
             return true;
         }
 
-        if (isset(static::messages()[Validator::$lastFailed])) {
-            $error =  static::messages()[Validator::$lastFailed];
-        } else {
-            $error = 'Error: validation failed of ' . preg_replace('/\./', ' as ', Validator::$lastFailed, 1);
-        }
+        $error = Validator::message(
+            Validator::$lastFailed,
+            static::messages(),
+            static::attributes()
+        );
 
         static::onInvalid($error);
         return false;
@@ -134,6 +134,19 @@ class Request extends Neuron
         return [];
     }
 
+    /**
+     * Human-readable names for the fields.
+     *
+     * Forwarded to Validator::message() so the :attribute marker in the error
+     * text can be replaced with a friendlier name (e.g. "edad" => "la edad").
+     *
+     * @return array
+     */
+    public function attributes(): array
+    {
+        return [];
+    }
+
     /**
      * Function to execute when an invalid value has been detected.
      *