Fix calendar event iteration by advancing to next event after display

src/calendar_manager.py

@@ -303,6 +303,9 @@ class CalendarManager:
             # Update the display
             self.display_manager.update_display()
             logger.debug("CalendarManager event display updated.")
+            
+            # Advance to next event for next display
+            self.advance_event()
         else:
             # Draw failed (error logged in draw_event), show debug message
             logger.warning("Failed to draw calendar event")