refactor(calendar): simplify shouldRefetch to use fetchInterval directly

Remove unnecessary parameter from shouldRefetch() and use the fetcher's
reloadInterval directly. This respects the user's configured fetchInterval
as the threshold for rate limit protection.

Author: KristjanESPERANTO

modules/default/calendar/calendarfetcher.js

@@ -182,15 +182,16 @@ class CalendarFetcher {
 	}
 
 	/**
-	 * Check if enough time has passed since the last fetch to warrant a new one
-	 * @param {number} minInterval - Minimum milliseconds between fetches (default: 3 minutes)
+	 * Check if enough time has passed since the last fetch to warrant a new one.
+	 * Uses reloadInterval as the threshold to respect user's configured fetchInterval.
 	 * @returns {boolean} True if a new fetch should be performed
 	 */
-	shouldRefetch (minInterval = 3 * 60 * 1000) {
+	shouldRefetch () {
 		if (!this.lastFetch) {
 			return true;
 		}
-		return (Date.now() - this.lastFetch) >= minInterval;
+		const timeSinceLastFetch = Date.now() - this.lastFetch;
+		return timeSinceLastFetch >= this.reloadInterval;
 	}
 
 	/**