Warenwirtschaft: AP-53 — Gramm-Mengen mit drei Nachkommastellen (Produktion, Wareneingang, Ausschuss)

Kundennachtrag 09.09.2026: Ist-Mengen je Charge in der Produktion sollen auf das Milligramm eingegeben werden können (z. B. 0,125 g). Bisher rundeten Datenbank (decimal 12,2), Bestandslogik, Anzeige und Toleranzsockel auf zwei Stellen; „0,125" wurde still zu 0,13, „0.125" nach der Punkt-Regel zu 125 g.

- Migration 2026_09_09_100000: production_ingredients.quantity_used, stock_entries.ordered_quantity/received_quantity, stock_disposals.quantity → decimal(12,3); Casts decimal:3. Auf der Dev-DB (Live-Kopie) ausgeführt, 53/78/7 Zeilen unverändert.
- InventoryService::QUANTITY_DECIMALS = 3; roundWawiQuantity() ersetzt alle round(…, 2) in InventoryService, ProductionService, StockDisposalController/-Request, StockEntryRepository/-Controller, RawMaterialStockController.
- formatWawiQuantity($v, $min = 2): bis drei Stellen, mindestens zwei — Produktionsdetail, Einkauf Liste/Detail/Formular, Ausschuss-Liste, Chargen-Rest im Rohstoff-Detail.
- Eingaberegel (reFormatWawiNumber, JS parseGerman/parseNumber): zusätzlich „0.xxx" als Dezimalzahl; „1.500" bleibt 1500. Produktions-JS: fmt() bis drei Stellen, fmtInput() schreibt gespeicherte Zahlen deutsch ins Feld (1,125 statt 1.125 = 1125).
- Soll-Ist-Toleranz: Sockel 0,05 → 0,005 g; Ausschuss min 0,001.
- Doku: Hinweise (Neu/geändert), Leitfaden Version 3.1 mit Abschnitt 26, Plan V7 AP-53, README (Deploy-Checkliste, Suite 378).

Tests: QuantityPrecisionTest (6) — Parsing, Anzeige, Produktion 0,125 g exakt + Rest 9,875 g, Entwurf 1,125 wiederöffnen, Toleranz Kleinmengen, Ausschuss 0,005 g.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

app/Http/Controllers/Admin/Inventory/RawMaterialStockController.php

@@ -110,7 +110,7 @@ class RawMaterialStockController extends Controller
         $remainingByLocation = $this->inventoryService->remainingByLocationForIngredient($ingredient->id);
 
         $openOrders = $this->inventoryService->openOrdersForIngredient($ingredient->id);
-        $openTotal = round((float) $openOrders->sum('ordered_quantity'), 2);
+        $openTotal = roundWawiQuantity((float) $openOrders->sum('ordered_quantity'));
 
         $daily = ($this->inventoryService->dailyConsumptionByIngredient([$ingredient->id]))[$ingredient->id] ?? null;
         $minAlert = $ingredient->min_stock_alert !== null ? (float) $ingredient->min_stock_alert : null;
@@ -128,7 +128,7 @@ class RawMaterialStockController extends Controller
             'ingredient' => $ingredient,
             'productStock' => $productStock,
             'chargeGroups' => $chargeGroups,
-            'remaining' => round($remaining, 2),
+            'remaining' => roundWawiQuantity($remaining),
             'remainingByLocation' => $remainingByLocation,
             'locations' => Location::query()->where('active', true)->orderBy('name')->get(),
             'openOrders' => $openOrders,
@@ -169,8 +169,8 @@ class RawMaterialStockController extends Controller
 
             $usage[(int) $productId] = [
                 'percent' => round($percent, 3),
-                'grams_per_piece' => $hasMassBasis ? round($percent * $scale, 2) : null,
-                'consumption_per_piece' => $hasMassBasis ? round($withFactor * $scale, 2) : null,
+                'grams_per_piece' => $hasMassBasis ? roundWawiQuantity($percent * $scale) : null,
+                'consumption_per_piece' => $hasMassBasis ? roundWawiQuantity($withFactor * $scale) : null,
             ];
         }
 

app/Http/Controllers/Admin/Inventory/StockDisposalController.php

@@ -109,19 +109,19 @@ class StockDisposalController extends Controller
         }
 
         $ingredientId = (int) $data['ingredient_id'];
-        $quantity = round((float) $data['quantity'], 2);
+        $quantity = roundWawiQuantity((float) $data['quantity']);
 
         if (! empty($data['stock_entry_id'])) {
             $entry = StockEntry::query()->lockForUpdate()->findOrFail((int) $data['stock_entry_id']);
             $available = $productionService->availableStockEntriesForIngredient($ingredientId, (int) $entry->location_id)->firstWhere('id', $entry->id);
-            $remaining = $available !== null ? round((float) $available->getAttribute('remaining_quantity'), 2) : 0.0;
+            $remaining = $available !== null ? roundWawiQuantity((float) $available->getAttribute('remaining_quantity')) : 0.0;
         } else {
             // Alle Eingänge des Rohstoffs am Standort sperren, dann Standortrest neu berechnen.
             StockEntry::query()->lockForUpdate()
                 ->where('entry_type', 'ingredient')->where('ingredient_id', $ingredientId)
                 ->where('location_id', (int) $data['location_id'])
                 ->get();
-            $remaining = round((float) ($this->inventoryService->remainingByLocationForIngredient($ingredientId)[(int) $data['location_id']] ?? 0.0), 2);
+            $remaining = roundWawiQuantity((float) ($this->inventoryService->remainingByLocationForIngredient($ingredientId)[(int) $data['location_id']] ?? 0.0));
         }
 
         if ($quantity > $remaining) {
@@ -156,15 +156,15 @@ class StockDisposalController extends Controller
         }
 
         $rows = [];
-        $needed = round((float) $data['quantity'], 2);
+        $needed = roundWawiQuantity((float) $data['quantity']);
         $lastIndex = $entries->count() - 1;
         foreach ($entries as $index => $entry) {
             $capacity = (float) $entry->getAttribute('remaining_quantity');
-            $take = $index === $lastIndex ? $needed : round(min($needed, $capacity), 2);
+            $take = $index === $lastIndex ? $needed : roundWawiQuantity(min($needed, $capacity));
             if ($take > 0) {
                 $rows[] = array_merge($data, ['stock_entry_id' => (int) $entry->id, 'quantity' => $take]);
             }
-            $needed = round($needed - $take, 2);
+            $needed = roundWawiQuantity($needed - $take);
             if ($needed <= 0) {
                 break;
             }

app/Http/Controllers/Admin/Inventory/StockEntryController.php

@@ -165,7 +165,7 @@ class StockEntryController extends Controller
         // die Kopie zur Gramm-Bestellung und ein Wareneingang „100“ bucht 100 g statt 79 g.
         if ($stockEntry->purchase_unit === 'ml' && $stockEntry->density_used !== null && (float) $stockEntry->density_used > 0) {
             $data['ordered_unit'] = 'ml';
-            $data['ordered_quantity'] = round((float) $stockEntry->ordered_quantity / (float) $stockEntry->density_used, 2);
+            $data['ordered_quantity'] = roundWawiQuantity((float) $stockEntry->ordered_quantity / (float) $stockEntry->density_used);
             $data['density_used'] = (float) $stockEntry->density_used;
         }
 
@@ -270,7 +270,7 @@ class StockEntryController extends Controller
         return response()->json([
             'exists' => true,
             'purchases' => $entries->count(),
-            'remaining' => round((float) $remaining, 2),
+            'remaining' => roundWawiQuantity((float) $remaining),
             'best_before' => $latest->best_before?->format('d.m.Y'),
             'location' => $latest->location?->name,
             'quality_id' => $latest->quality_id,