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/ProductVariant.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+class ProductVariant extends Model
+{
+    protected $fillable = ['product_id','sku','price_override','stock','stock_warning','active'];
+
+    protected $casts = ['active' => 'boolean', 'price_override' => 'decimal:2'];
+
+    public function product(): BelongsTo
+    {
+        return $this->belongsTo(Product::class);
+    }
+
+    public function attributeValues(): BelongsToMany
+    {
+        return $this->belongsToMany(AttributeValue::class, 'product_variant_attribute_values')
+            ->with('attribute');
+    }
+
+    public function getEffectivePriceAttribute(): float
+    {
+        return (float) ($this->price_override ?? $this->product->base_price);
+    }
+
+    public function getLabelAttribute(): string
+    {
+        return $this->attributeValues->map(fn($v) => $v->value)->join(', ');
+    }
+}