Remove recipe name field; use product title internally

The recipe name input is dropped from the product form — the version
number alone identifies a recipe. The product title is stored as the
internal name to satisfy the NOT NULL constraint. The history table
no longer shows the name column.

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

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

@@ -27,12 +27,11 @@ class CreateProduct extends CreateRecord
             ]);
         }
 
-        $recipeName = $data['recipe_name'] ?? null;
-        $spices     = $data['recipe_spices'] ?? [];
+        $spices = $data['recipe_spices'] ?? [];
 
-        if ($recipeName) {
+        if (! empty($spices)) {
             $recipe = Recipe::create([
-                'name'       => $recipeName,
+                'name'       => $data['title'],
                 'product_id' => $record->id,
                 'version'    => 1,
             ]);