feat(commands): describe catalog rows per component with package fallback

tests/group2_manifest_test.php

@@ -121,3 +121,28 @@ Harness::it('ciclo de dependencias se detecta', function () {
 
     rrmdir($dir);
 });
+
+Harness::it('la descripcion del componente prevalece y hereda del paquete', function () {
+    $m = Manifest::fromArray([
+        'name'        => 'pkg',
+        'version'     => '1.0.0',
+        'description' => 'Resumen del paquete',
+        'components'  => [
+            'a' => ['files' => ['src/A.php'], 'description' => 'Componente A'],
+            'b' => ['files' => ['src/B.php']],
+        ],
+    ]);
+
+    eq('Componente A', $m->descriptionOf('a'), 'descripción propia gana');
+    eq('Resumen del paquete', $m->descriptionOf('b'), 'sin descripción propia hereda del paquete');
+    eq('Resumen del paquete', $m->descriptionOf(), 'sin componente: la del paquete');
+
+    $m2 = Manifest::fromArray(['name' => 'x', 'version' => '1.0.0', 'components' => ['c' => ['files' => ['c.php']]]]);
+    eq('', $m2->descriptionOf('c'), 'paquete sin texto produce cadena vacía (no null)');
+
+    throws(fn () => Manifest::fromArray([
+        'name'       => 'y',
+        'version'    => '1.0.0',
+        'components' => ['c' => ['files' => ['c.php'], 'description' => 7]],
+    ]), 'description no-string es inválida');
+});