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('/'),

app/Filament/User/Resources/ProductResource/RelationManagers/BatchesRelationManager.php

@@ -0,0 +1,109 @@
+<?php
+
+namespace App\Filament\User\Resources\ProductResource\RelationManagers;
+
+use Filament\Forms;
+use Filament\Forms\Form;
+use Filament\Resources\RelationManagers\RelationManager;
+use Filament\Tables;
+use Filament\Tables\Table;
+
+class BatchesRelationManager extends RelationManager
+{
+    protected static string $relationship = 'batches';
+    protected static ?string $title = 'Chargen (LOT)';
+    protected static ?string $modelLabel = 'Charge';
+    protected static ?string $pluralModelLabel = 'Chargen';
+
+    public function form(Form $form): Form
+    {
+        return $form->schema([
+            Forms\Components\TextInput::make('lot_number')
+                ->label('LOT-Nummer')
+                ->required()
+                ->unique(ignoreRecord: true)
+                ->maxLength(255),
+
+            Forms\Components\Select::make('recipe_id')
+                ->label('Rezeptur')
+                ->relationship('recipe', 'name')
+                ->searchable()
+                ->preload()
+                ->required(),
+
+            Forms\Components\DatePicker::make('produced_at')
+                ->label('Produktionsdatum'),
+
+            Forms\Components\DatePicker::make('expires_at')
+                ->label('Mindesthaltbarkeitsdatum'),
+
+            Forms\Components\Repeater::make('origins')
+                ->label('Herkunft der Gewürze')
+                ->relationship()
+                ->schema([
+                    Forms\Components\Select::make('spice_id')
+                        ->label('Gewürz')
+                        ->relationship('spice', 'name')
+                        ->searchable()
+                        ->preload()
+                        ->required(),
+
+                    Forms\Components\Select::make('supplier_id')
+                        ->label('Lieferant')
+                        ->relationship('supplier', 'name')
+                        ->searchable()
+                        ->preload()
+                        ->nullable(),
+
+                    Forms\Components\TextInput::make('origin_country')
+                        ->label('Herkunftsland')
+                        ->maxLength(100),
+
+                    Forms\Components\TextInput::make('farmer')
+                        ->label('Landwirt / Betrieb')
+                        ->maxLength(255),
+
+                    Forms\Components\Textarea::make('notes')
+                        ->label('Infos zum Gewürz')
+                        ->rows(2)
+                        ->columnSpanFull(),
+                ])
+                ->columns(2)
+                ->addActionLabel('Gewürz hinzufügen')
+                ->columnSpanFull(),
+        ]);
+    }
+
+    public function table(Table $table): Table
+    {
+        return $table
+            ->recordTitleAttribute('lot_number')
+            ->columns([
+                Tables\Columns\TextColumn::make('lot_number')
+                    ->label('LOT-Nummer')
+                    ->searchable()
+                    ->sortable(),
+
+                Tables\Columns\TextColumn::make('recipe.name')
+                    ->label('Rezeptur'),
+
+                Tables\Columns\TextColumn::make('produced_at')
+                    ->label('Produktion')
+                    ->date('d.m.Y')
+                    ->sortable(),
+
+                Tables\Columns\TextColumn::make('expires_at')
+                    ->label('MHD')
+                    ->date('d.m.Y')
+                    ->sortable(),
+            ])
+            ->defaultSort('produced_at', 'desc')
+            ->actions([
+                Tables\Actions\EditAction::make(),
+                Tables\Actions\DeleteAction::make(),
+            ])
+            ->headerActions([
+                Tables\Actions\CreateAction::make(),
+            ]);
+    }
+}