refactor: Cleanup git state - commit all staged changes

Major refactoring cleanup:
- Add new controller architecture (class-controller-*.php)
- Add new settings-v2 UI (views/settings-v2/)
- Add new CSS architecture (agentic-sidebar.css, tokens)
- Add esbuild build pipeline (scripts/build.js, package.json)
- Add composer dependencies (vendor/)
- Add frontend src directory (assets/js/src/index.jsx)
- Add documentation files
- Remove old/obsolete files (class-settings.php, old CSS)

This commits all pending changes from previous refactoring efforts.

vendor/symfony/dependency-injection/Compiler/AutoAliasServicePass.php

@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Alias;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+/**
+ * Sets a service to be an alias of another one, given a format pattern.
+ */
+class AutoAliasServicePass implements CompilerPassInterface
+{
+    /**
+     * @return void
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->findTaggedServiceIds('auto_alias') as $serviceId => $tags) {
+            foreach ($tags as $tag) {
+                if (!isset($tag['format'])) {
+                    throw new InvalidArgumentException(\sprintf('Missing tag information "format" on auto_alias service "%s".', $serviceId));
+                }
+
+                $aliasId = $container->getParameterBag()->resolveValue($tag['format']);
+                if ($container->hasDefinition($aliasId) || $container->hasAlias($aliasId)) {
+                    $alias = new Alias($aliasId, $container->getDefinition($serviceId)->isPublic());
+                    $container->setAlias($serviceId, $alias);
+                }
+            }
+        }
+    }
+}