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/isSameWeek.d.cts

@@ -0,0 +1,46 @@
+import type { LocalizedOptions, WeekOptions } from "./types.js";
+import type { ContextOptions, DateArg } from "./types.js";
+/**
+ * The {@link isSameWeek} function options.
+ */
+export interface IsSameWeekOptions
+  extends WeekOptions,
+    LocalizedOptions<"options">,
+    ContextOptions<Date> {}
+/**
+ * @name isSameWeek
+ * @category Week Helpers
+ * @summary Are the given dates in the same week (and month and year)?
+ *
+ * @description
+ * Are the given dates in the same week (and month and year)?
+ *
+ * @param laterDate - The first date to check
+ * @param earlierDate - The second date to check
+ * @param options - An object with options
+ *
+ * @returns The dates are in the same week (and month and year)
+ *
+ * @example
+ * // Are 31 August 2014 and 4 September 2014 in the same week?
+ * const result = isSameWeek(new Date(2014, 7, 31), new Date(2014, 8, 4))
+ * //=> true
+ *
+ * @example
+ * // If week starts with Monday,
+ * // are 31 August 2014 and 4 September 2014 in the same week?
+ * const result = isSameWeek(new Date(2014, 7, 31), new Date(2014, 8, 4), {
+ *   weekStartsOn: 1
+ * })
+ * //=> false
+ *
+ * @example
+ * // Are 1 January 2014 and 1 January 2015 in the same week?
+ * const result = isSameWeek(new Date(2014, 0, 1), new Date(2015, 0, 1))
+ * //=> false
+ */
+export declare function isSameWeek(
+  laterDate: DateArg<Date> & {},
+  earlierDate: DateArg<Date> & {},
+  options?: IsSameWeekOptions,
+): boolean;