feat(production): Batch bei Produktionsstart automatisch erstellen (#73)

- BatchNumber in allen ProductionOrder-Endpoints via BatchRepository auflösen
- BatchCreationFailed Error-Variante statt generischem ValidationFailure
- bestBeforeDate-Berechnung als Recipe.calculateBestBeforeDate() in die Domain verschoben

frontend/apps/cli/src/components/production/ProductionOrderDetailScreen.tsx

@@ -20,7 +20,7 @@ const STATUS_COLORS: Record<string, string> = {
   CANCELLED: 'red',
 };
 
-type Mode = 'view' | 'menu' | 'start-batch-input' | 'reschedule-input';
+type Mode = 'view' | 'menu' | 'reschedule-input';
 
 export function ProductionOrderDetailScreen() {
   const { params, back } = useNavigation();
@@ -31,7 +31,6 @@ export function ProductionOrderDetailScreen() {
   const { recipeName } = useRecipeNameLookup();
   const [mode, setMode] = useState<Mode>('view');
   const [menuIndex, setMenuIndex] = useState(0);
-  const [batchId, setBatchId] = useState('');
   const [newDate, setNewDate] = useState('');
   const [success, setSuccess] = useState<string | null>(null);
   const [batch, setBatch] = useState<BatchDTO | null>(null);
@@ -80,12 +79,11 @@ export function ProductionOrderDetailScreen() {
   };
 
   const handleStart = async () => {
-    if (!batchId.trim()) return;
-    const result = await startProductionOrder(orderId, { batchId: batchId.trim() });
+    const result = await startProductionOrder(orderId);
     if (result) {
-      setSuccess('Produktion gestartet.');
+      const bn = result.batchNumber ? ` Charge: ${result.batchNumber}` : '';
+      setSuccess(`Produktion gestartet.${bn}`);
       setMode('view');
-      setBatchId('');
     }
   };
 
@@ -107,11 +105,6 @@ export function ProductionOrderDetailScreen() {
       return;
     }
 
-    if (mode === 'start-batch-input') {
-      if (key.escape) setMode('menu');
-      return;
-    }
-
     if (mode === 'menu') {
       if (key.upArrow) setMenuIndex((i) => Math.max(0, i - 1));
       if (key.downArrow) setMenuIndex((i) => Math.min(menuItems.length - 1, i + 1));
@@ -122,10 +115,7 @@ export function ProductionOrderDetailScreen() {
           setMode('reschedule-input');
           setNewDate('');
         }
-        if (action === 'start') {
-          setMode('start-batch-input');
-          setBatchId('');
-        }
+        if (action === 'start') void handleStart();
       }
       if (key.escape) setMode('view');
       return;
@@ -218,22 +208,6 @@ export function ProductionOrderDetailScreen() {
         </Box>
       )}
 
-      {mode === 'start-batch-input' && (
-        <Box flexDirection="column" borderStyle="round" borderColor="yellow" paddingX={1}>
-          <Text color="yellow" bold>Chargen-ID eingeben:</Text>
-          <Box>
-            <Text color="gray"> › </Text>
-            <TextInput
-              value={batchId}
-              onChange={setBatchId}
-              onSubmit={() => void handleStart()}
-              focus={true}
-            />
-          </Box>
-          <Text color="gray" dimColor>Enter bestätigen · Escape abbrechen</Text>
-        </Box>
-      )}
-
       {mode === 'reschedule-input' && (
         <Box flexDirection="column" borderStyle="round" borderColor="yellow" paddingX={1}>
           <Text color="yellow" bold>Neues Datum (YYYY-MM-DD):</Text>