WIP: map route updates and custom item drag/drop fixes (broken)

- Fixed map header not updating in ItineraryTableViewWrapper using Coordinator pattern
- Added routeVersion UUID to force Map re-render when routes change
- Fixed determineAnchor to scan backwards for correct anchor context
- Added location support to CustomItineraryItem (lat/lng/address)
- Added MapKit place search to AddItemSheet
- Added extensive debug logging for route waypoint calculation

Known issues:
- Custom items still not routing correctly after drag/drop
- Anchor type determination may still have bugs

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

SportsTime/Core/Models/Domain/CustomItineraryItem.swift

@@ -4,6 +4,7 @@
 //
 
 import Foundation
+import CoreLocation
 
 struct CustomItineraryItem: Identifiable, Codable, Hashable {
     let id: UUID
@@ -17,6 +18,22 @@ struct CustomItineraryItem: Identifiable, Codable, Hashable {
     let createdAt: Date
     var modifiedAt: Date
 
+    // Optional location for mappable items (from MapKit search)
+    var latitude: Double?
+    var longitude: Double?
+    var address: String?
+
+    /// Whether this item has a location and can be shown on the map
+    var isMappable: Bool {
+        latitude != nil && longitude != nil
+    }
+
+    /// Get coordinate if mappable
+    var coordinate: CLLocationCoordinate2D? {
+        guard let lat = latitude, let lon = longitude else { return nil }
+        return CLLocationCoordinate2D(latitude: lat, longitude: lon)
+    }
+
     init(
         id: UUID = UUID(),
         tripId: UUID,
@@ -27,7 +44,10 @@ struct CustomItineraryItem: Identifiable, Codable, Hashable {
         anchorDay: Int,
         sortOrder: Int = 0,
         createdAt: Date = Date(),
-        modifiedAt: Date = Date()
+        modifiedAt: Date = Date(),
+        latitude: Double? = nil,
+        longitude: Double? = nil,
+        address: String? = nil
     ) {
         self.id = id
         self.tripId = tripId
@@ -39,6 +59,9 @@ struct CustomItineraryItem: Identifiable, Codable, Hashable {
         self.sortOrder = sortOrder
         self.createdAt = createdAt
         self.modifiedAt = modifiedAt
+        self.latitude = latitude
+        self.longitude = longitude
+        self.address = address
     }
 
     enum ItemCategory: String, Codable, CaseIterable {