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/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Class_.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Class_ extends MagicConst {
+    public function getName(): string {
+        return '__CLASS__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Class';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Dir.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Dir extends MagicConst {
+    public function getName(): string {
+        return '__DIR__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Dir';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/File.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class File extends MagicConst {
+    public function getName(): string {
+        return '__FILE__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_File';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Function_.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Function_ extends MagicConst {
+    public function getName(): string {
+        return '__FUNCTION__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Function';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Line.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Line extends MagicConst {
+    public function getName(): string {
+        return '__LINE__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Line';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Method.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Method extends MagicConst {
+    public function getName(): string {
+        return '__METHOD__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Method';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Namespace_.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Namespace_ extends MagicConst {
+    public function getName(): string {
+        return '__NAMESPACE__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Namespace';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Property.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Property extends MagicConst {
+    public function getName(): string {
+        return '__PROPERTY__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Property';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Scalar/MagicConst/Trait_.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Scalar\MagicConst;
+
+use PhpParser\Node\Scalar\MagicConst;
+
+class Trait_ extends MagicConst {
+    public function getName(): string {
+        return '__TRAIT__';
+    }
+
+    public function getType(): string {
+        return 'Scalar_MagicConst_Trait';
+    }
+}