Add recipe inline create/edit and batches relation on product page

- Recipe select now has a create/edit modal (name + description)
- Batches RelationManager shows all LOT charges for the product below
  the form, sorted newest first, with create/edit/delete actions

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

app/Filament/User/Resources/ProductResource.php

@@ -52,7 +52,21 @@ class ProductResource extends Resource {
                     ->native(false)
                     ->searchable()
                     ->relationship('recipe', 'name')
-                    ->required(),
+                    ->required()
+                    ->createOptionForm([
+                        Forms\Components\TextInput::make('name')
+                            ->label('Name')
+                            ->required(),
+                        Forms\Components\Textarea::make('description')
+                            ->label('Beschreibung'),
+                    ])
+                    ->editOptionForm([
+                        Forms\Components\TextInput::make('name')
+                            ->label('Name')
+                            ->required(),
+                        Forms\Components\Textarea::make('description')
+                            ->label('Beschreibung'),
+                    ]),
                 Repeater::make('sizes')
                     ->schema([
                         Select::make('packing_id')
@@ -140,6 +154,12 @@ class ProductResource extends Resource {
             ]);
     }
 
+    public static function getRelations(): array {
+        return [
+            RelationManagers\BatchesRelationManager::class,
+        ];
+    }
+
     public static function getPages(): array {
         return [
             'index' => Pages\ListProducts::route('/'),