Enables marking scheduled events as complete

Implements a feature to mark scheduled events as complete, replacing the checkbox with a button for improved UX.

This commit enhances the Scheduled Events functionality by allowing users to mark events as complete. It also includes:

- Replaces the checkbox with a "Mark Complete" button for better usability.
- Adds logging for debugging purposes during event completion toggling.
- Routes completion events (kind 31925) to the ScheduledEventService.
- Optimistically updates the local state after publishing completion events.

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

@@ -276,8 +276,11 @@ export class FeedService extends BaseService {
 
     // Route RSVP/completion events (kind 31925) to ScheduledEventService
     if (event.kind === 31925) {
+      console.log('🔀 FeedService: Routing kind 31925 (completion) to ScheduledEventService')
       if (this.scheduledEventService) {
         this.scheduledEventService.handleCompletionEvent(event)
+      } else {
+        console.warn('⚠️ FeedService: ScheduledEventService not available')
       }
       return
     }