Pre-fill batch origin rows from recipe spices automatically

When creating a new batch, the Herkunft-Repeater is automatically populated
with one row per Rohstoff from the product's current recipe. The Rohstoff
field is shown as a read-only label (Hidden spice_id + Placeholder name)
so the user only fills in supplier, origin country, farmer and notes.

Changing the recipe field updates the origin rows accordingly.
On edit, existing origin data is preserved unchanged.

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

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

@@ -3,6 +3,8 @@
 namespace App\Filament\User\Resources\ProductResource\RelationManagers;
 
 use App\Models\ProductSize;
+use App\Models\Recipe;
+use App\Models\Spice;
 use Filament\Forms;
 use Filament\Forms\Form;
 use Filament\Forms\Get;
@@ -39,10 +41,31 @@ class BatchesRelationManager extends RelationManager
 
             Forms\Components\Select::make('recipe_id')
                 ->label('Rezeptur')
-                ->relationship('recipe', 'name')
-                ->searchable()
-                ->preload()
-                ->required(),
+                ->options(fn () => Recipe::where('product_id', $this->getOwnerRecord()->id)
+                    ->orderByDesc('version')
+                    ->get()
+                    ->mapWithKeys(fn ($r) => [$r->id => 'v' . $r->version . ' · ' . $r->created_at->format('d.m.Y')])
+                )
+                ->default(fn () => $this->getOwnerRecord()->recipes_id)
+                ->required()
+                ->live()
+                ->afterStateUpdated(function ($state, $set) {
+                    if (! $state) {
+                        $set('origins', []);
+                        return;
+                    }
+                    $recipe = Recipe::with('spices')->find($state);
+                    if (! $recipe) {
+                        return;
+                    }
+                    $set('origins', $recipe->spices->map(fn ($s) => [
+                        'spice_id'       => $s->id,
+                        'supplier_id'    => null,
+                        'origin_country' => null,
+                        'farmer'         => null,
+                        'notes'          => null,
+                    ])->toArray());
+                }),
 
             Forms\Components\TextInput::make('units_produced')
                 ->label('Anzahl Einheiten')
@@ -70,15 +93,36 @@ class BatchesRelationManager extends RelationManager
                 ->label('Mindesthaltbarkeitsdatum'),
 
             Forms\Components\Repeater::make('origins')
-                ->label('Herkunft der Gewürze')
+                ->label('Herkunft der Rohstoffe')
                 ->relationship()
+                ->afterStateHydrated(function ($component, $record, $livewire) {
+                    // Pre-fill from product's current recipe only when creating a new batch
+                    if ($record?->id) {
+                        return;
+                    }
+                    $recipeId = $livewire->getOwnerRecord()->recipes_id;
+                    if (! $recipeId) {
+                        return;
+                    }
+                    $recipe = Recipe::with('spices')->find($recipeId);
+                    if (! $recipe) {
+                        return;
+                    }
+                    $component->state($recipe->spices->map(fn ($s) => [
+                        'spice_id'       => $s->id,
+                        'supplier_id'    => null,
+                        'origin_country' => null,
+                        'farmer'         => null,
+                        'notes'          => null,
+                    ])->toArray());
+                })
                 ->schema([
-                    Forms\Components\Select::make('spice_id')
-                        ->label('Gewürz')
-                        ->relationship('spice', 'name')
-                        ->searchable()
-                        ->preload()
-                        ->required(),
+                    Forms\Components\Hidden::make('spice_id'),
+                    Forms\Components\Placeholder::make('spice_name')
+                        ->label('Rohstoff')
+                        ->content(fn (Get $get): string =>
+                            Spice::find($get('spice_id'))?->name ?? '—'
+                        ),
 
                     Forms\Components\Select::make('supplier_id')
                         ->label('Lieferant')
@@ -96,12 +140,12 @@ class BatchesRelationManager extends RelationManager
                         ->maxLength(255),
 
                     Forms\Components\Textarea::make('notes')
-                        ->label('Infos zum Gewürz')
+                        ->label('Notizen')
                         ->rows(2)
                         ->columnSpanFull(),
                 ])
                 ->columns(2)
-                ->addActionLabel('Gewürz hinzufügen')
+                ->addActionLabel('Rohstoff hinzufügen')
                 ->columnSpanFull(),
         ]);
     }
@@ -118,10 +162,13 @@ class BatchesRelationManager extends RelationManager
 
                 Tables\Columns\TextColumn::make('units_produced')
                     ->label('Einheiten')
-                    ->suffix(fn ($record) => $record->quantity_g ? ' (' . number_format($record->quantity_g, 0, ',', '.') . 'g)' : ''),
+                    ->suffix(fn ($record) => $record->quantity_g
+                        ? ' (' . number_format($record->quantity_g, 0, ',', '.') . 'g)'
+                        : ''),
 
-                Tables\Columns\TextColumn::make('recipe.name')
-                    ->label('Rezeptur'),
+                Tables\Columns\TextColumn::make('recipe.version')
+                    ->label('Rezeptur')
+                    ->formatStateUsing(fn ($state) => $state ? 'v' . $state : '—'),
 
                 Tables\Columns\TextColumn::make('produced_at')
                     ->label('Produktion')