Add F-068, F-069, F-070 UI tests for custom itinerary item lifecycle

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

SportsTime/Features/Trip/Views/ItineraryTableViewController.swift

@@ -1113,6 +1113,7 @@ final class ItineraryTableViewController: UITableViewController {
         
         cell.backgroundColor = .clear
         cell.selectionStyle = .default  // Shows highlight on tap
+        cell.accessibilityIdentifier = "tripDetail.customItem"
     }
 }
 
@@ -1175,6 +1176,7 @@ struct DaySectionHeaderView: View {
             .tint(Theme.warmOrange)
             .accessibilityLabel("Add item to Day \(dayNumber)")
             .accessibilityHint("Add restaurants, activities, or notes to this day")
+            .accessibilityIdentifier("tripDetail.addItemButton")
         }
         .padding(.horizontal, Theme.Spacing.lg)
         .padding(.top, Theme.Spacing.lg)  // More space above for section separation