feat(automation): number formats for raw material and production batches, raw material minimum

- RAW_MATERIAL_LOT_NUMBER_FORMAT / PRODUCTION_BATCH_NUMBER_FORMAT fill in the
  lot number when it is left empty, like honey batches and bottlings.
- RAW_MATERIAL_LOW: task when the total of a raw material kind drops below
  config.minGrams after consumption, withdrawal or inventory count.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Frontend/src/app/(app)/production-batches/new/page.tsx

@@ -70,7 +70,7 @@ export default function NewProductionBatchPage() {
     mutationFn: () =>
       createProductionBatch({
         productId,
-        lotNumber: lotNumber.trim(),
+        lotNumber: lotNumber.trim() || undefined,
         date: new Date(date).toISOString(),
         quantity: Number(quantity),
         bestBeforeDate: bestBeforeDate
@@ -150,7 +150,7 @@ export default function NewProductionBatchPage() {
               <Label htmlFor="pb-lot">Chargennummer</Label>
               <Input
                 id="pb-lot"
-                required
+                placeholder="Automatisch, falls Automatisierung aktiv"
                 value={lotNumber}
                 onChange={(event) => setLotNumber(event.target.value)}
               />

ApiCore-Frontend/src/app/(app)/raw-materials/new/page.tsx

@@ -46,7 +46,7 @@ export default function NewRawMaterialPage() {
     mutationFn: () =>
       createRawMaterialLot({
         kind,
-        lotNumber: lotNumber.trim(),
+        lotNumber: lotNumber.trim() || undefined,
         date: new Date(date).toISOString(),
         quantity: Number(quantity),
         apiaryId: apiaryId === NO_APIARY ? undefined : apiaryId,
@@ -110,7 +110,7 @@ export default function NewRawMaterialPage() {
               <Label htmlFor="raw-lot">Chargennummer</Label>
               <Input
                 id="raw-lot"
-                required
+                placeholder="Automatisch, falls Automatisierung aktiv"
                 value={lotNumber}
                 onChange={(event) => setLotNumber(event.target.value)}
               />

ApiCore-Frontend/src/app/(app)/settings/automation/automation-rules-tab.tsx

@@ -28,6 +28,9 @@ const TRIGGER_LABELS: Record<AutomationTriggerType, string> = {
   BOTTLING_LOT_NUMBER_FORMAT: "Los-/Chargennummer-Format (Abfüllungen)",
   TREATMENT_FOLLOW_UP: "Kontrolle nach Behandlung",
   FEEDING_FOLLOW_UP: "Kontrolle nach Fütterung",
+  RAW_MATERIAL_LOT_NUMBER_FORMAT: "Chargennummer-Format (Rohstoffe)",
+  PRODUCTION_BATCH_NUMBER_FORMAT: "Chargennummer-Format (Herstellung)",
+  RAW_MATERIAL_LOW: "Rohstoff unter Mindestmenge",
 };
 
 const TRIGGER_DESCRIPTIONS: Record<AutomationTriggerType, string> = {
@@ -51,13 +54,51 @@ const TRIGGER_DESCRIPTIONS: Record<AutomationTriggerType, string> = {
     "Nach jeder erfassten Behandlung eine Kontrollaufgabe vorschlagen, fällig die eingestellten Tage nach Behandlungsende. Die passende Frist hängt vom Mittel ab (Packungsbeilage) – deshalb ab Werk aus und ohne voreingestellte Frist.",
   FEEDING_FOLLOW_UP:
     "Nach jeder erfassten Fütterung eine Kontrollaufgabe vorschlagen, fällig die eingestellten Tage nach der Fütterung. Ab Werk aus und ohne voreingestellte Frist.",
+  RAW_MATERIAL_LOT_NUMBER_FORMAT:
+    "Wenn aktiv, wird die Chargennummer neuer Rohstoff-Chargen (Wachs, Propolis) automatisch nach diesem Format erzeugt, statt sie manuell einzugeben.",
+  PRODUCTION_BATCH_NUMBER_FORMAT:
+    "Wenn aktiv, wird die Chargennummer neuer Herstellungschargen (Kerzen, Tinkturen, …) automatisch nach diesem Format erzeugt, statt sie manuell einzugeben.",
+  RAW_MATERIAL_LOW:
+    "Fällt der Gesamtbestand einer Rohstoff-Art nach Verbrauch, Entnahme oder Inventur unter die Mindestmenge, dann Aufgabe zum Nachschub. Leere Mindestmenge = diese Art wird nicht überwacht.",
 };
 
 const NUMBER_FORMAT_TRIGGER_TYPES: AutomationTriggerType[] = [
   "HONEY_BATCH_NUMBER_FORMAT",
   "BOTTLING_LOT_NUMBER_FORMAT",
+  "RAW_MATERIAL_LOT_NUMBER_FORMAT",
+  "PRODUCTION_BATCH_NUMBER_FORMAT",
 ];
 
+const MIN_GRAMS_FIELDS: { kind: "BEESWAX" | "PROPOLIS"; label: string }[] = [
+  { kind: "BEESWAX", label: "Mindestmenge Bienenwachs (g)" },
+  { kind: "PROPOLIS", label: "Mindestmenge Propolis (g)" },
+];
+
+type MinGrams = Partial<Record<"BEESWAX" | "PROPOLIS", string>>;
+
+function ruleMinGrams(rule: AutomationRule): MinGrams {
+  const config = rule.config as { minGrams?: Record<string, unknown> } | null;
+  const result: MinGrams = {};
+  for (const { kind } of MIN_GRAMS_FIELDS) {
+    const value = config?.minGrams?.[kind];
+    result[kind] = typeof value === "number" ? String(value) : "";
+  }
+  return result;
+}
+
+/** Empty fields drop out; anything else must be whole grams >= 0. */
+function parseMinGrams(input: MinGrams): Record<string, number> | null {
+  const result: Record<string, number> = {};
+  for (const { kind } of MIN_GRAMS_FIELDS) {
+    const raw = (input[kind] ?? "").trim();
+    if (raw === "") continue;
+    const grams = Number(raw);
+    if (!Number.isInteger(grams) || grams < 0) return null;
+    result[kind] = grams;
+  }
+  return result;
+}
+
 function isNumberFormatRule(rule: AutomationRule): boolean {
   return NUMBER_FORMAT_TRIGGER_TYPES.includes(rule.triggerType);
 }
@@ -83,6 +124,7 @@ function RuleCard({ rule }: { rule: AutomationRule }) {
   const [threshold, setThreshold] = useState(ruleThreshold(rule));
   const [format, setFormat] = useState(ruleFormat(rule));
   const [dueInDays, setDueInDays] = useState(ruleDueInDays(rule));
+  const [minGrams, setMinGrams] = useState<MinGrams>(ruleMinGrams(rule));
   const numberFormatRule = isNumberFormatRule(rule);
 
   const mutation = useMutation({
@@ -119,6 +161,14 @@ function RuleCard({ rule }: { rule: AutomationRule }) {
     if (rule.triggerType === "VARROA_THRESHOLD") {
       config.thresholdMitesPerDay = Number(threshold) || 10;
     }
+    if (rule.triggerType === "RAW_MATERIAL_LOW") {
+      const parsed = parseMinGrams(minGrams);
+      if (!parsed) {
+        toast.error("Mindestmenge bitte als ganze Gramm angeben – oder leer lassen.");
+        return;
+      }
+      config.minGrams = parsed;
+    }
     mutation.mutate({ actionTemplate: actionTemplate || undefined, config });
   }
 
@@ -194,6 +244,25 @@ function RuleCard({ rule }: { rule: AutomationRule }) {
             />
           </div>
         ) : null}
+        {rule.triggerType === "RAW_MATERIAL_LOW"
+          ? MIN_GRAMS_FIELDS.map(({ kind, label }) => (
+              <div key={kind} className="flex flex-col gap-2">
+                <Label htmlFor={`min-${kind}-${rule.id}`}>{label}</Label>
+                <Input
+                  id={`min-${kind}-${rule.id}`}
+                  type="number"
+                  inputMode="numeric"
+                  min={0}
+                  step={1}
+                  placeholder="leer = nicht überwachen"
+                  value={minGrams[kind] ?? ""}
+                  onChange={(event) =>
+                    setMinGrams((current) => ({ ...current, [kind]: event.target.value }))
+                  }
+                />
+              </div>
+            ))
+          : null}
         <div className="flex justify-between gap-2">
           <Button
             type="button"