Embed recipe editing directly on product page

Replaces the recipe dropdown with an inline Section containing a name
field and a spice-repeater with percentage inputs. On save, the recipe
is created (version 1) or updated in place; spice pivot rows are synced
via sync(). SumEquals100 rule enforces that percentages add up to 100.

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

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

@@ -3,6 +3,7 @@
 namespace App\Filament\User\Resources\ProductResource\Pages;
 
 use App\Filament\User\Resources\ProductResource;
+use App\Models\Recipe;
 use Filament\Actions;
 use Filament\Resources\Pages\EditRecord;
 
@@ -19,6 +20,7 @@ class EditProduct extends EditRecord
 
     protected function afterSave(): void {
         $this->syncSizes();
+        $this->syncRecipe();
     }
 
     protected function syncSizes(): void {
@@ -39,4 +41,33 @@ class EditProduct extends EditRecord
 
         $product->sizes()->sync($sizes);
     }
+
+    protected function syncRecipe(): void
+    {
+        $product = $this->record;
+        $name   = $this->data['recipe_name'] ?? null;
+        $spices = $this->data['recipe_spices'] ?? [];
+
+        if (! $name) {
+            return;
+        }
+
+        $pivotData = collect($spices)->mapWithKeys(fn ($s) => [
+            $s['spice_id'] => ['amount_in_percent' => $s['amount_in_percent']],
+        ])->toArray();
+
+        if ($product->recipe) {
+            $product->recipe->update(['name' => $name]);
+            $product->recipe->spices()->sync($pivotData);
+        } else {
+            $nextVersion = Recipe::where('product_id', $product->id)->max('version') + 1;
+            $recipe = Recipe::create([
+                'name'       => $name,
+                'product_id' => $product->id,
+                'version'    => $nextVersion,
+            ]);
+            $recipe->spices()->sync($pivotData);
+            $product->update(['recipes_id' => $recipe->id]);
+        }
+    }
 }