fix: restrict delete button to admins

src/utils/configUtils.js

@@ -0,0 +1,5 @@
+export const sortEntriesByLabel = (entries = []) => {
+  return [...entries].sort((a, b) =>
+    (a?.label || '').localeCompare(b?.label || '', 'de', { sensitivity: 'base' })
+  );
+};

src/utils/dateUtils.js

@@ -0,0 +1,51 @@
+import { format, parseISO, isValid, startOfDay } from 'date-fns';
+import { de } from 'date-fns/locale';
+
+export const parseDateValue = (value) => {
+  if (!value) {
+    return null;
+  }
+  const parsed = parseISO(value);
+  return isValid(parsed) ? parsed : null;
+};
+
+export const formatDateValue = (date) => {
+  if (!(date instanceof Date) || !isValid(date)) {
+    return null;
+  }
+  return format(date, 'yyyy-MM-dd');
+};
+
+export const formatRangeLabel = (start, end) => {
+  const startDate = parseDateValue(start);
+  const endDate = parseDateValue(end);
+  if (startDate && endDate) {
+    const startLabel = format(startDate, 'dd.MM.yyyy', { locale: de });
+    const endLabel = format(endDate, 'dd.MM.yyyy', { locale: de });
+    if (startLabel === endLabel) {
+      return startLabel;
+    }
+    return `${startLabel} – ${endLabel}`;
+  }
+  if (startDate) {
+    return format(startDate, 'dd.MM.yyyy', { locale: de });
+  }
+  return 'Zeitraum auswählen';
+};
+
+export const buildSelectionRange = (start, end, minDate) => {
+  const minimum = minDate || startOfDay(new Date());
+  let startDate = parseDateValue(start) || parseDateValue(end) || minimum;
+  let endDate = parseDateValue(end) || parseDateValue(start) || startDate;
+  if (startDate < minimum) {
+    startDate = minimum;
+  }
+  if (endDate < minimum) {
+    endDate = startDate;
+  }
+  return {
+    startDate,
+    endDate,
+    key: 'selection'
+  };
+};