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/composer/autoload_real.php

@@ -0,0 +1,48 @@
+<?php
+
+// autoload_real.php @generated by Composer
+
+class ComposerAutoloaderInit8473eb9ab2bb6a7e53dfa60c99584524
+{
+    private static $loader;
+
+    public static function loadClassLoader($class)
+    {
+        if ('Composer\Autoload\ClassLoader' === $class) {
+            require __DIR__ . '/ClassLoader.php';
+        }
+    }
+
+    /**
+     * @return \Composer\Autoload\ClassLoader
+     */
+    public static function getLoader()
+    {
+        if (null !== self::$loader) {
+            return self::$loader;
+        }
+
+        spl_autoload_register(array('ComposerAutoloaderInit8473eb9ab2bb6a7e53dfa60c99584524', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader(\dirname(__DIR__));
+        spl_autoload_unregister(array('ComposerAutoloaderInit8473eb9ab2bb6a7e53dfa60c99584524', 'loadClassLoader'));
+
+        require __DIR__ . '/autoload_static.php';
+        call_user_func(\Composer\Autoload\ComposerStaticInit8473eb9ab2bb6a7e53dfa60c99584524::getInitializer($loader));
+
+        $loader->register(true);
+
+        $filesToLoad = \Composer\Autoload\ComposerStaticInit8473eb9ab2bb6a7e53dfa60c99584524::$files;
+        $requireFile = \Closure::bind(static function ($fileIdentifier, $file) {
+            if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
+                $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
+
+                require $file;
+            }
+        }, null, null);
+        foreach ($filesToLoad as $fileIdentifier => $file) {
+            $requireFile($fileIdentifier, $file);
+        }
+
+        return $loader;
+    }
+}