It appears you have a well-structured Git repository with various files, including SVG icons and HTML documents. Here's a brief overview:

backend/node_modules/date-fns/esm/differenceInWeeks/index.d.ts

@@ -0,0 +1,4 @@
+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+import { differenceInWeeks } from 'date-fns'
+export default differenceInWeeks

backend/node_modules/date-fns/esm/differenceInWeeks/index.js

@@ -0,0 +1,49 @@
+import differenceInDays from "../differenceInDays/index.js";
+import requiredArgs from "../_lib/requiredArgs/index.js";
+import { getRoundingMethod } from "../_lib/roundingMethods/index.js";
+/**
+ * @name differenceInWeeks
+ * @category Week Helpers
+ * @summary Get the number of full weeks between the given dates.
+ *
+ * @description
+ * Get the number of full weeks between two dates. Fractional weeks are
+ * truncated towards zero by default.
+ *
+ * One "full week" is the distance between a local time in one day to the same
+ * local time 7 days earlier or later. A full week can sometimes be less than
+ * or more than 7*24 hours if a daylight savings change happens between two dates.
+ *
+ * To ignore DST and only measure exact 7*24-hour periods, use this instead:
+ * `Math.floor(differenceInHours(dateLeft, dateRight)/(7*24))|0`.
+ *
+ *
+ * @param {Date|Number} dateLeft - the later date
+ * @param {Date|Number} dateRight - the earlier date
+ * @param {Object} [options] - an object with options.
+ * @param {String} [options.roundingMethod='trunc'] - a rounding method (`ceil`, `floor`, `round` or `trunc`)
+ * @returns {Number} the number of full weeks
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // How many full weeks are between 5 July 2014 and 20 July 2014?
+ * const result = differenceInWeeks(new Date(2014, 6, 20), new Date(2014, 6, 5))
+ * //=> 2
+ *
+ * // How many full weeks are between
+ * // 1 March 2020 0:00 and 6 June 2020 0:00 ?
+ * // Note: because local time is used, the
+ * // result will always be 8 weeks (54 days),
+ * // even if DST starts and the period has
+ * // only 54*24-1 hours.
+ * const result = differenceInWeeks(
+ *   new Date(2020, 5, 1),
+ *   new Date(2020, 2, 6)
+ * )
+ * //=> 8
+ */
+export default function differenceInWeeks(dateLeft, dateRight, options) {
+  requiredArgs(2, arguments);
+  var diff = differenceInDays(dateLeft, dateRight) / 7;
+  return getRoundingMethod(options === null || options === void 0 ? void 0 : options.roundingMethod)(diff);
+}

backend/node_modules/date-fns/esm/differenceInWeeks/index.js.flow

@@ -0,0 +1,58 @@
+// @flow
+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+export type Interval = {
+  start: Date | number,
+  end: Date | number,
+}
+
+export type Locale = {
+  code?: string,
+  formatDistance?: (...args: Array<any>) => any,
+  formatRelative?: (...args: Array<any>) => any,
+  localize?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  formatLong?: {
+    date: (...args: Array<any>) => any,
+    time: (...args: Array<any>) => any,
+    dateTime: (...args: Array<any>) => any,
+  },
+  match?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  options?: {
+    weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6,
+    firstWeekContainsDate?: 1 | 2 | 3 | 4 | 5 | 6 | 7,
+  },
+}
+
+export type Duration = {
+  years?: number,
+  months?: number,
+  weeks?: number,
+  days?: number,
+  hours?: number,
+  minutes?: number,
+  seconds?: number,
+}
+
+export type Day = 0 | 1 | 2 | 3 | 4 | 5 | 6
+
+declare module.exports: (
+  dateLeft: Date | number,
+  dateRight: Date | number,
+  options?: {
+    roundingMethod?: string,
+  }
+) => number

backend/node_modules/date-fns/esm/differenceInWeeks/package.json

@@ -0,0 +1,4 @@
+{
+  "sideEffects": false,
+  "typings": "../../typings.d.ts"
+}