Add Shopify pull-from feature and fix product creation payload

- Add "Aus Shopify laden" button on product edit page that pulls description
  and variant prices/SKUs/GTINs from Shopify back into SMS
- Add ShopifyService::getProduct() for fetching a single product
- Add 'options' to createProduct() payload so Shopify properly creates variants
  (without it Shopify ignores variant option values)
- Add request/response logging to createProduct() for diagnosing transfer issues
- Remove dead code from ProductResource (mutateFormData*, getRecord, getActions)
- Clean up imports in ProductResource

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

app/Filament/User/Resources/ProductResource/Pages/EditProduct.php

@@ -31,6 +31,15 @@ class EditProduct extends EditRecord
                         ->exists()
                 )
                 ->action(fn () => $this->createProductInShopify()),
+            Actions\Action::make('pull-from-shopify')
+                ->label('Aus Shopify laden')
+                ->icon('heroicon-o-arrow-down-tray')
+                ->color('gray')
+                ->requiresConfirmation()
+                ->modalHeading('Aus Shopify aktualisieren')
+                ->modalDescription('Überschreibt Beschreibung und Variantenpreise/-SKUs mit den aktuellen Shopify-Daten.')
+                ->visible(fn () => (bool) $this->record->shopify_product_id)
+                ->action(fn () => $this->pullFromShopify()),
             Actions\Action::make('rezept-versionen')
                 ->label('Rezept-Versionen')
                 ->icon('heroicon-o-clock')
@@ -181,6 +190,50 @@ class EditProduct extends EditRecord
         }
     }
 
+    public function pullFromShopify(): void
+    {
+        $product = $this->record;
+
+        if (! $product->shopify_product_id) {
+            Notification::make()->title('Kein Shopify-Produkt verknüpft')->warning()->send();
+            return;
+        }
+
+        try {
+            $data = app(ShopifyService::class)->getProduct($product->shopify_product_id);
+
+            $updates = [];
+            if (! empty($data['description'])) {
+                $updates['description'] = $data['description'];
+            }
+            if ($updates) {
+                $product->update($updates);
+            }
+
+            $variantMap = collect($data['variants'])->keyBy('shopify_variant_id');
+
+            ProductSize::where('product_id', $product->id)
+                ->whereNotNull('shopify_variant_id')
+                ->get()
+                ->each(function (ProductSize $size) use ($variantMap) {
+                    $shopifyVariant = $variantMap->get($size->shopify_variant_id);
+                    if (! $shopifyVariant) {
+                        return;
+                    }
+                    $size->update([
+                        'price' => $shopifyVariant['price'],
+                        'sku'   => $shopifyVariant['sku'] ?: $size->sku,
+                        'gtin'  => $shopifyVariant['gtin'] ?: $size->gtin,
+                    ]);
+                });
+
+            Notification::make()->title('Aus Shopify aktualisiert')->success()->send();
+            $this->redirect(ProductResource::getUrl('edit', ['record' => $product]));
+        } catch (\Throwable $e) {
+            Notification::make()->title('Shopify-Fehler')->body($e->getMessage())->danger()->send();
+        }
+    }
+
     public function syncVariantWithShopify(int $sizeId): void
     {
         $size = ProductSize::find($sizeId);