refactor(itinerary): replace CustomItineraryItem with ItineraryItem across codebase

- Update CKModels.swift to remove deleted type references
- Migrate LocalCustomItem to LocalItineraryItem in SavedTrip.swift
- Update AppDelegate to handle subscription removal
- Refactor AddItemSheet to create ItineraryItem with CustomInfo
- Update ItineraryTableViewController and Wrapper for new model
- Refactor TripDetailView state, methods and callbacks
- Fix TripMapView to display custom items with new model structure

This completes the migration from the legacy CustomItineraryItem/TravelDayOverride
model to the unified ItineraryItem model with ItemKind enum.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

SportsTime/Features/Trip/Views/ItineraryTableViewController.swift

@@ -151,11 +151,11 @@
 //    - Parameters: itemId, newDay (1-indexed), newSortOrder
 //    - Parent updates item and syncs to CloudKit
 //
-//  onCustomItemTapped: ((CustomItineraryItem) -> Void)?
+//  onCustomItemTapped: ((ItineraryItem) -> Void)?
 //    - Called when user taps custom item row
 //    - Parent presents edit sheet
 //
-//  onCustomItemDeleted: ((CustomItineraryItem) -> Void)?
+//  onCustomItemDeleted: ((ItineraryItem) -> Void)?
 //    - Called from context menu delete action
 //    - Parent deletes from CloudKit
 //
@@ -209,8 +209,8 @@
 //
 //  - ItineraryTableViewWrapper.swift: SwiftUI bridge, data transformation
 //  - TripDetailView.swift: Parent view, owns state, handles callbacks
-//  - CustomItineraryItem.swift: Domain model with (day, sortOrder) positioning
-//  - CustomItemService.swift: CloudKit persistence for custom items
+//  - ItineraryItem.swift: Domain model with (day, sortOrder, kind) positioning
+//  - ItineraryItemService.swift: CloudKit persistence for itinerary items
 //
 //  ═══════════════════════════════════════════════════════════════════════════════
 
@@ -250,7 +250,7 @@ enum ItineraryRowItem: Identifiable, Equatable {
     case dayHeader(dayNumber: Int, date: Date)  // Fixed: structural anchor (includes Add button)
     case games([RichGame], dayNumber: Int)      // Fixed: games are trip-determined
     case travel(TravelSegment, dayNumber: Int)  // Reorderable: within valid range
-    case customItem(CustomItineraryItem)        // Reorderable: anywhere
+    case customItem(ItineraryItem)              // Reorderable: anywhere
 
     /// Stable identifier for table view diffing and external references.
     /// Travel IDs are lowercase to ensure consistency across sessions.
@@ -297,8 +297,8 @@ final class ItineraryTableViewController: UITableViewController {
     // Callbacks
     var onTravelMoved: ((String, Int) -> Void)?  // travelId, newDay
     var onCustomItemMoved: ((UUID, Int, Double) -> Void)?  // itemId, newDay, newSortOrder
-    var onCustomItemTapped: ((CustomItineraryItem) -> Void)?
-    var onCustomItemDeleted: ((CustomItineraryItem) -> Void)?
+    var onCustomItemTapped: ((ItineraryItem) -> Void)?
+    var onCustomItemDeleted: ((ItineraryItem) -> Void)?
     var onAddButtonTapped: ((Int) -> Void)?  // Just day number
 
     // Cell reuse identifiers
@@ -981,7 +981,7 @@ final class ItineraryTableViewController: UITableViewController {
 
     /// Custom item cell - shows user-added item with category icon.
     /// Selectable (opens edit sheet on tap) and draggable.
-    private func configureCustomItemCell(_ cell: UITableViewCell, item: CustomItineraryItem) {
+    private func configureCustomItemCell(_ cell: UITableViewCell, item: ItineraryItem) {
         cell.contentConfiguration = UIHostingConfiguration {
             CustomItemRowView(item: item, colorScheme: colorScheme)
         }
@@ -1225,36 +1225,42 @@ struct TravelRowView: View {
 ///
 /// This row is both tappable (opens edit sheet) and draggable.
 struct CustomItemRowView: View {
-    let item: CustomItineraryItem
+    let item: ItineraryItem
     let colorScheme: ColorScheme
 
+    private var customInfo: CustomInfo? {
+        item.customInfo
+    }
+
     var body: some View {
         HStack(spacing: Theme.Spacing.sm) {
             // Category icon (emoji)
-            Text(item.category.icon)
-                .font(.title3)
+            if let info = customInfo {
+                Text(info.icon)
+                    .font(.title3)
 
-            VStack(alignment: .leading, spacing: 2) {
-                HStack(spacing: 4) {
-                    Text(item.title)
-                        .font(.subheadline)
-                        .foregroundStyle(Theme.textPrimary(colorScheme))
-                        .lineLimit(1)
+                VStack(alignment: .leading, spacing: 2) {
+                    HStack(spacing: 4) {
+                        Text(info.title)
+                            .font(.subheadline)
+                            .foregroundStyle(Theme.textPrimary(colorScheme))
+                            .lineLimit(1)
 
-                    // Map pin indicator for items with coordinates
-                    if item.isMappable {
-                        Image(systemName: "mappin.circle.fill")
-                            .font(.caption)
-                            .foregroundStyle(Theme.warmOrange)
+                        // Map pin indicator for items with coordinates
+                        if info.isMappable {
+                            Image(systemName: "mappin.circle.fill")
+                                .font(.caption)
+                                .foregroundStyle(Theme.warmOrange)
+                        }
                     }
-                }
 
-                // Address subtitle (shown only if present)
-                if let address = item.address, !address.isEmpty {
-                    Text(address)
-                        .font(.caption)
-                        .foregroundStyle(Theme.textMuted(colorScheme))
-                        .lineLimit(1)
+                    // Address subtitle (shown only if present)
+                    if let address = info.address, !address.isEmpty {
+                        Text(address)
+                            .font(.caption)
+                            .foregroundStyle(Theme.textMuted(colorScheme))
+                            .lineLimit(1)
+                    }
                 }
             }