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/Models/OrderItem.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class OrderItem extends Model
+{
+    protected $fillable = ['order_id','product_variant_id','product_name','variant_label','quantity','unit_price','tax_rate'];
+
+    protected $casts = ['unit_price' => 'decimal:2', 'tax_rate' => 'decimal:2'];
+
+    public function order(): BelongsTo
+    {
+        return $this->belongsTo(Order::class);
+    }
+
+    public function variant(): BelongsTo
+    {
+        return $this->belongsTo(ProductVariant::class, 'product_variant_id');
+    }
+
+    public function getLineTotalAttribute(): float
+    {
+        return round($this->unit_price * $this->quantity, 2);
+    }
+
+    public function getTaxAmountAttribute(): float
+    {
+        $net = $this->unit_price / (1 + $this->tax_rate / 100);
+        return round(($this->unit_price - $net) * $this->quantity, 2);
+    }
+}