feat(compat): sweep of components against the real core with strict diagnostics

tests/compat/text/router.php

@@ -0,0 +1,28 @@
+<?php
+
+// Router de compatibilidad del paquete text (inyectado en src/Routers/Compat.php
+// por scripts/compat-sweep). Ejercita Filter y Replacement sobre el arranque
+// real del core (Loader -> Router::apply()).
+
+use Libs\Filter;
+use Libs\Replacement;
+use Libs\Router;
+
+Router::get('/compat/text/filter', function () {
+    Filter::add(
+        fn (string $content): string => str_replace('mundo', 'MUNDIN', $content),
+        'compat',
+        5
+    );
+    Filter::add(
+        fn (string $content): string => strtoupper($content) . '|',
+        'compat',
+        20
+    );
+    echo 'FILTER_OK:' . Filter::apply('hola mundo', 'compat');
+});
+
+Router::get('/compat/text/replacement', function () {
+    Replacement::add('/\bfoo\b/', 'bar');
+    echo 'REPL_OK:' . Replacement::apply('foo y food y foo');
+});