增加admin管理帐号和项目的界面--初步实现

frontend/node_modules/date-fns/monthsToYears.mjs

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+import { monthsInYear } from "./constants.mjs";
+
+/**
+ * @name monthsToYears
+ * @category Conversion Helpers
+ * @summary Convert number of months to years.
+ *
+ * @description
+ * Convert a number of months to a full number of years.
+ *
+ * @param months - The number of months to be converted
+ *
+ * @returns The number of months converted in years
+ *
+ * @example
+ * // Convert 36 months to years:
+ * const result = monthsToYears(36)
+ * //=> 3
+ *
+ * // It uses floor rounding:
+ * const result = monthsToYears(40)
+ * //=> 3
+ */
+export function monthsToYears(months) {
+  const years = months / monthsInYear;
+  return Math.trunc(years);
+}
+
+// Fallback for modularized imports:
+export default monthsToYears;