Add OpenAPI docs, frontend, migrations, and API updates

- OpenAPI: add missing endpoints (add-from-url, subscriptions, public availability)
- OpenAPI: CalendarSubscription schema, Subscriptions tag
- Frontend app
- Migrations: count_for_availability, subscriptions_sync, user_preferences, calendar_settings
- Config, rate limit, auth, calendar, booking, ICS, availability, user service updates

Made-with: Cursor

frontend/node_modules/date-fns/lastDayOfWeek.cjs

@@ -0,0 +1,44 @@
+"use strict";
+exports.lastDayOfWeek = lastDayOfWeek;
+var _index = require("./_lib/defaultOptions.cjs");
+var _index2 = require("./toDate.cjs");
+
+/**
+ * The {@link lastDayOfWeek} function options.
+ */
+
+/**
+ * @name lastDayOfWeek
+ * @category Week Helpers
+ * @summary Return the last day of a week for the given date.
+ *
+ * @description
+ * Return the last day of a week for the given date.
+ * The result will be in the local timezone unless a context is specified.
+ *
+ * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
+ * @typeParam ResultDate - The result `Date` type, it is the type returned from the context function if it is passed, or inferred from the arguments.
+ *
+ * @param date - The original date
+ * @param options - An object with options
+ *
+ * @returns The last day of a week
+ */
+function lastDayOfWeek(date, options) {
+  const defaultOptions = (0, _index.getDefaultOptions)();
+  const weekStartsOn =
+    options?.weekStartsOn ??
+    options?.locale?.options?.weekStartsOn ??
+    defaultOptions.weekStartsOn ??
+    defaultOptions.locale?.options?.weekStartsOn ??
+    0;
+
+  const _date = (0, _index2.toDate)(date, options?.in);
+  const day = _date.getDay();
+  const diff = (day < weekStartsOn ? -7 : 0) + 6 - (day - weekStartsOn);
+
+  _date.setHours(0, 0, 0, 0);
+  _date.setDate(_date.getDate() + diff);
+
+  return _date;
+}