Make configuration more robust for single sources

icalendar.ts

@@ -118,19 +118,21 @@ function convertDatesToStrings<T>(obj: T): DateToString<T> {
  * Retrieves and validates configured calendar sources
  */
 async function getSources(): Promise<Source[]> {
+  // Using system.getSpaceConfig as config.get is being phased out in syscalls
   const plugConfig = await config.get<PlugConfig>("icalendar", { sources: [] });
 
-  if (!plugConfig.sources || !Array.isArray(plugConfig.sources)) {
-    console.error("[iCalendar] Invalid configuration:", { plugConfig });
+  if (!plugConfig.sources) {
     return [];
   }
 
-  if (plugConfig.sources.length === 0) {
-    return [];
+  // Handle case where user provides a single object instead of an array
+  let sources = plugConfig.sources;
+  if (!Array.isArray(sources)) {
+    sources = [sources as unknown as Source];
   }
 
   const validated: Source[] = [];
-  for (const src of plugConfig.sources) {
+  for (const src of sources) {
     if (typeof src.url !== "string") {
       console.error("[iCalendar] Invalid source (missing url):", src);
       continue;