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/clamp.cjs

@@ -0,0 +1,61 @@
+"use strict";
+exports.clamp = clamp;
+var _index = require("./_lib/normalizeDates.cjs");
+var _index2 = require("./max.cjs");
+var _index3 = require("./min.cjs");
+
+/**
+ * The {@link clamp} function options.
+ */
+
+/**
+ * The {@link clamp} function result type. It resolves the proper data type.
+ * It uses the first argument date object type, starting from the date argument,
+ * then the start interval date, and finally the end interval date. If
+ * a context function is passed, it uses the context function return type.
+ */
+
+/**
+ * @name clamp
+ * @category Interval Helpers
+ * @summary Return a date bounded by the start and the end of the given interval.
+ *
+ * @description
+ * Clamps a date to the lower bound with the start of the interval and the upper
+ * bound with the end of the interval.
+ *
+ * - When the date is less than the start of the interval, the start is returned.
+ * - When the date is greater than the end of the interval, the end is returned.
+ * - Otherwise the date is returned.
+ *
+ * @typeParam DateType - Date argument type.
+ * @typeParam IntervalType - Interval argument type.
+ * @typeParam Options - Options type.
+ *
+ * @param date - The date to be bounded
+ * @param interval - The interval to bound to
+ * @param options - An object with options
+ *
+ * @returns The date bounded by the start and the end of the interval
+ *
+ * @example
+ * // What is Mar 21, 2021 bounded to an interval starting at Mar 22, 2021 and ending at Apr 01, 2021
+ * const result = clamp(new Date(2021, 2, 21), {
+ *   start: new Date(2021, 2, 22),
+ *   end: new Date(2021, 3, 1),
+ * })
+ * //=> Mon Mar 22 2021 00:00:00
+ */
+function clamp(date, interval, options) {
+  const [date_, start, end] = (0, _index.normalizeDates)(
+    options?.in,
+    date,
+    interval.start,
+    interval.end,
+  );
+
+  return (0, _index3.min)(
+    [(0, _index2.max)([date_, start], options), end],
+    options,
+  );
+}