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/contracts/Tests/Service/ServiceSubscriberTraitTest.php

@@ -0,0 +1,97 @@
+<?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\Contracts\Tests\Service;
+
+use PHPUnit\Framework\Attributes\Group;
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
+use PHPUnit\Framework\TestCase;
+use Psr\Container\ContainerInterface;
+use Symfony\Contracts\Service\Attribute\Required;
+use Symfony\Contracts\Service\Attribute\SubscribedService;
+use Symfony\Contracts\Service\ServiceLocatorTrait;
+use Symfony\Contracts\Service\ServiceSubscriberInterface;
+use Symfony\Contracts\Service\ServiceSubscriberTrait;
+
+#[IgnoreDeprecations]
+#[Group('legacy')]
+class ServiceSubscriberTraitTest extends TestCase
+{
+    public static function setUpBeforeClass(): void
+    {
+        class_exists(LegacyTestService::class);
+    }
+
+    public function testMethodsOnParentsAndChildrenAreIgnoredInGetSubscribedServices()
+    {
+        $expected = [
+            LegacyTestService::class.'::aService' => Service2::class,
+            LegacyTestService::class.'::nullableInAttribute' => '?'.Service2::class,
+            LegacyTestService::class.'::nullableReturnType' => '?'.Service2::class,
+            new SubscribedService(LegacyTestService::class.'::withAttribute', Service2::class, true, new Required()),
+        ];
+
+        $this->assertEquals($expected, LegacyChildTestService::getSubscribedServices());
+    }
+
+    public function testSetContainerIsCalledOnParent()
+    {
+        $container = new class([]) implements ContainerInterface {
+            use ServiceLocatorTrait;
+        };
+
+        $this->assertSame($container, (new LegacyTestService())->setContainer($container));
+    }
+
+    public function testParentNotCalledIfHasMagicCall()
+    {
+        $container = new class([]) implements ContainerInterface {
+            use ServiceLocatorTrait;
+        };
+        $service = new class extends LegacyParentWithMagicCall {
+            use ServiceSubscriberTrait;
+
+            private $container;
+        };
+
+        $this->assertNull($service->setContainer($container));
+        $this->assertSame([], $service::getSubscribedServices());
+    }
+
+    public function testParentNotCalledIfNoParent()
+    {
+        $container = new class([]) implements ContainerInterface {
+            use ServiceLocatorTrait;
+        };
+        $service = new class {
+            use ServiceSubscriberTrait;
+
+            private $container;
+        };
+
+        $this->assertNull($service->setContainer($container));
+        $this->assertSame([], $service::getSubscribedServices());
+    }
+
+    public function testSetContainerCalledFirstOnParent()
+    {
+        $container1 = new class([]) implements ContainerInterface {
+            use ServiceLocatorTrait;
+        };
+        $container2 = clone $container1;
+
+        $testService = new class extends LegacyParentTestService2 implements ServiceSubscriberInterface {
+            use ServiceSubscriberTrait;
+        };
+        $this->assertNull($testService->setContainer($container1));
+        $this->assertSame($container1, $testService->setContainer($container2));
+    }
+}