chore: remove legacy itinerary models and services

Removed:
- CustomItineraryItem
- TravelDayOverride
- CustomItemService
- CustomItemSubscriptionService
- TravelOverrideService
- CustomItemRow

These are replaced by unified ItineraryItem model and service.

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

SportsTime/Core/Models/Domain/CustomItineraryItem.swift

@@ -1,94 +0,0 @@
-//
-//  CustomItineraryItem.swift
-//  SportsTime
-//
-
-import Foundation
-import CoreLocation
-
-struct CustomItineraryItem: Identifiable, Codable, Hashable {
-    let id: UUID
-    let tripId: UUID
-    var category: ItemCategory
-    var title: String
-    var day: Int           // Day number (1-indexed)
-    var sortOrder: Double  // Position within day (allows insertion between items)
-    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,
-        category: ItemCategory,
-        title: String,
-        day: Int,
-        sortOrder: Double = 0.0,
-        createdAt: Date = Date(),
-        modifiedAt: Date = Date(),
-        latitude: Double? = nil,
-        longitude: Double? = nil,
-        address: String? = nil
-    ) {
-        self.id = id
-        self.tripId = tripId
-        self.category = category
-        self.title = title
-        self.day = day
-        self.sortOrder = sortOrder
-        self.createdAt = createdAt
-        self.modifiedAt = modifiedAt
-        self.latitude = latitude
-        self.longitude = longitude
-        self.address = address
-    }
-
-    enum ItemCategory: String, Codable, CaseIterable {
-        case restaurant
-        case hotel
-        case activity
-        case note
-
-        var icon: String {
-            switch self {
-            case .restaurant: return "🍽️"
-            case .hotel: return "🏨"
-            case .activity: return "🎯"
-            case .note: return "📝"
-            }
-        }
-
-        var label: String {
-            switch self {
-            case .restaurant: return "Restaurant"
-            case .hotel: return "Hotel"
-            case .activity: return "Activity"
-            case .note: return "Note"
-            }
-        }
-
-        var systemImage: String {
-            switch self {
-            case .restaurant: return "fork.knife"
-            case .hotel: return "bed.double.fill"
-            case .activity: return "figure.run"
-            case .note: return "note.text"
-            }
-        }
-    }
-}

SportsTime/Core/Models/Domain/TravelDayOverride.swift

@@ -1,38 +0,0 @@
-//
-//  TravelDayOverride.swift
-//  SportsTime
-//
-//  Stores user-customized travel day positions
-//
-
-import Foundation
-
-/// Represents a user override of the default travel day placement.
-/// Travel segments normally appear on the day after the last game in the departure city.
-/// This model allows users to drag travel to a different day within valid bounds.
-struct TravelDayOverride: Identifiable, Codable, Hashable {
-    let id: UUID
-    let tripId: UUID
-    /// Stable identifier for the travel segment (e.g., "travel:houston->arlington")
-    let travelAnchorId: String
-    /// The day number (1-indexed) where the travel should display
-    var displayDay: Int
-    let createdAt: Date
-    var modifiedAt: Date
-
-    init(
-        id: UUID = UUID(),
-        tripId: UUID,
-        travelAnchorId: String,
-        displayDay: Int,
-        createdAt: Date = Date(),
-        modifiedAt: Date = Date()
-    ) {
-        self.id = id
-        self.tripId = tripId
-        self.travelAnchorId = travelAnchorId
-        self.displayDay = displayDay
-        self.createdAt = createdAt
-        self.modifiedAt = modifiedAt
-    }
-}