Add formula-based product pricing (P/W/MG) for Parsian-style unit prices.

Port FormulaPriceService from colleague app so admins can compute a single unit price from reference mid, weight, and wage instead of offset coefficients.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Services/ProductDisplayPriceService.php

@@ -95,6 +95,11 @@ class ProductDisplayPriceService
                 continue;
             }
 
+            if (FormulaPriceService::isEnabled($product) && $product->reading_method && is_array($zaarboxFeed)) {
+                $this->applyFormulaFeedPrice($product, $zaarboxFeed, $zaarbox);
+                continue;
+            }
+
             if ($this->usesAppPrice($product)) {
                 $base = $this->productUsesLastPriceIfZero($product)
                     ? $this->resolveAppBasePrice()
@@ -308,6 +313,45 @@ class ProductDisplayPriceService
         return $this->extractBaseFromPayload($cached);
     }
 
+    /** @param array<int, array<string, mixed>> $feed */
+    private function applyFormulaFeedPrice(Product $product, array $feed, ZaarboxPriceService $zaarbox): void
+    {
+        $useLast = $this->productUsesLastPriceIfZero($product);
+        $row = $zaarbox->findFeedRow($feed, (string) $product->reading_method);
+        if ($row === null) {
+            $product->setAttribute('reference_provider_active', $useLast);
+            $this->applyPriceOrFallback($product, 0, $useLast);
+
+            return;
+        }
+
+        $parts = $zaarbox->resolveReferenceBaseProfit($row);
+        $providerActive = $useLast || $parts['price'] > 0;
+        $product->setAttribute('reference_provider_active', $providerActive);
+
+        if (! $useLast && $parts['price'] <= 0) {
+            $this->zeroProductPrice($product);
+
+            return;
+        }
+
+        $computed = FormulaPriceService::calculateForProduct($product, [
+            'price' => $parts['price'],
+            'active' => true,
+        ]);
+
+        if ($computed === null || $computed <= 0) {
+            $this->applyPriceOrFallback($product, 0, $useLast);
+
+            return;
+        }
+
+        $product->setAttribute('price', $computed);
+        if (Schema::hasColumn($product->getTable(), 'price_profit')) {
+            $product->setAttribute('price_profit', 0);
+        }
+    }
+
     /** @param array<int, array<string, mixed>> $feed */
     private function applyReferenceFeedPrice(Product $product, array $feed, ZaarboxPriceService $zaarbox): void
     {
@@ -410,6 +454,10 @@ class ProductDisplayPriceService
                 }
             }
 
+            if (FormulaPriceService::isEnabled($product)) {
+                return (int) (($product->price ?? 0) + ($product->price_profit ?? 0));
+            }
+
             if ((int) ($product->direct_price ?? 0) === 1) {
                 return (int) (($product->price ?? 0) + ($product->price_profit ?? 0));
             }