Fix 500 on recipe save and surface errors as notifications

- Fix root cause: recipes_spices.amount_in_percent was decimal(4,2) which
  overflows on 100% — widened to decimal(6,2) via migration
- Wrap afterSave() in try-catch so DB/logic errors show as a persistent
  danger notification instead of a blank 500 page
- Same for CreateProduct: errors show as notification; also reads
  recipe_spices from raw Livewire $this->data (not $data param which
  excludes dehydrated(false) fields) so recipes actually save on create

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

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

@@ -51,8 +51,17 @@ class EditProduct extends EditRecord
 
     protected function afterSave(): void
     {
-        $this->syncSizes();
-        $this->syncRecipe();
+        try {
+            $this->syncSizes();
+            $this->syncRecipe();
+        } catch (\Throwable $e) {
+            Notification::make()
+                ->title('Fehler beim Speichern')
+                ->body($e->getMessage())
+                ->danger()
+                ->persistent()
+                ->send();
+        }
     }
 
     protected function syncSizes(): void