Warenwirtschaft: AP-09 bis AP-13 (Produktbestand, Set-Produkte, Ausschuss, Konzepte)

- AP-09 Produktbestand inkl. Bewegungshistorie (product_stock_movements, ProductStockService)
- AP-10 Rohstoffbestand-Ansicht je Lager (RawMaterialStockController)
- AP-11 Bestandsschwellen / Out-of-Stock-Handling fuer Produkte und Shop
- AP-12 Ausgang/Ausschuss (stock_disposals, StockDisposalController, InventoryService)
- Set-Produkte (product_set_items) inkl. Aufloesung
- Produktentwicklung & Hinweise-Verwaltung (Notices)
- AP-13 Entwicklungskonzept Shop-Bestandsabzug im Plan dokumentiert
- Feature-Tests fuer neue Module + aktualisierter Entwicklungsplan

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Providers/AppServiceProvider.php

@@ -2,9 +2,12 @@
 
 namespace App\Providers;
 
+use App\Services\InventoryService;
+use App\Services\ProductStockService;
 use Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider;
 use Illuminate\Support\Facades\Schema;
 use Illuminate\Support\Facades\URL;
+use Illuminate\Support\Facades\View;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -18,6 +21,18 @@ class AppServiceProvider extends ServiceProvider
     {
         Schema::defaultStringLength(191);
         URL::forceScheme('https');
+
+        View::composer('layouts.includes.layout-sidenav', function ($view): void {
+            $criticalIngredients = 0;
+            $criticalProducts = 0;
+            $user = auth()->user();
+            if ($user && $user->isCopyReader()) {
+                $criticalIngredients = app(InventoryService::class)->criticalIngredientCount();
+                $criticalProducts = app(ProductStockService::class)->criticalProductCount();
+            }
+            $view->with('criticalIngredientCount', $criticalIngredients);
+            $view->with('criticalProductCount', $criticalProducts);
+        });
     }
 
     /**