Initial commit: WitShop Laravel Online-Shop

- Laravel 11, Blade, Alpine.js, Tailwind CSS
- Produkt- & Kategorieverwaltung mit Varianten
- Checkout (Vorkasse + Rechnung), Session-Warenkorb
- Admin-Backend (Dashboard, Bestellungen, Kunden, CMS)
- DSGVO-konform: Cookie-Consent, Impressum, Widerruf, AGB
- PDF-Rechnung via dompdf, SMTP-Mailversand
- Kundenverwaltung mit manueller Freischaltung

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/Shop/CartController.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Http\Controllers\Shop;
+
+use App\Http\Controllers\Controller;
+use App\Models\ShippingRate;
+use App\Services\CartService;
+use Illuminate\Http\Request;
+
+class CartController extends Controller
+{
+    public function __construct(private CartService $cart) {}
+
+    public function index()
+    {
+        $items        = $this->cart->get();
+        $subtotal     = $this->cart->subtotal();
+        $shippingRate = ShippingRate::forCart($subtotal);
+        $shippingCost = $shippingRate ? $shippingRate->getCostForTotal($subtotal) : 0;
+        $total        = $subtotal + $shippingCost;
+
+        return view('shop.cart.index', compact('items', 'subtotal', 'shippingRate', 'shippingCost', 'total'));
+    }
+
+    public function add(Request $request)
+    {
+        $request->validate(['variant_id' => 'required|exists:product_variants,id', 'qty' => 'integer|min:1']);
+        $this->cart->add($request->variant_id, $request->integer('qty', 1));
+        return back()->with('success', 'Artikel zum Warenkorb hinzugefügt.');
+    }
+
+    public function update(Request $request)
+    {
+        foreach ($request->input('qty', []) as $key => $qty) {
+            $this->cart->update($key, (int) $qty);
+        }
+        return back()->with('success', 'Warenkorb aktualisiert.');
+    }
+
+    public function remove(string $key)
+    {
+        $this->cart->remove($key);
+        return back()->with('success', 'Artikel entfernt.');
+    }
+}