Filters and sorts scheduled events

Improves scheduled event retrieval by filtering events
based on user participation and sorting them by start time.

This ensures that users only see events they are participating
in or events that are open to the entire community.

src/modules/nostr-feed/services/ScheduledEventService.ts

@@ -194,13 +194,11 @@ export class ScheduledEventService extends BaseService {
    */
   getTodaysEvents(userPubkey?: string): ScheduledEvent[] {
     const today = new Date().toISOString().split('T')[0]
-    const events = this.getEventsForDate(today)
+    let events = this.getEventsForDate(today)
 
-    // If no user pubkey provided, return all events
-    if (!userPubkey) return events
-
-    // Filter events based on participation
-    return events.filter(event => {
+    // Filter events based on participation (if user pubkey provided)
+    if (userPubkey) {
+      events = events.filter(event => {
         // If event has no participants, it's community-wide (show to everyone)
         if (!event.participants || event.participants.length === 0) return true
 
@@ -209,6 +207,15 @@ export class ScheduledEventService extends BaseService {
       })
     }
 
+    // Sort by start time (ascending order)
+    events.sort((a, b) => {
+      // ISO datetime strings can be compared lexicographically
+      return a.start.localeCompare(b.start)
+    })
+
+    return events
+  }
+
   /**
    * Get completion status for an event
    */