feat(itinerary): add row views for itinerary items

Add specialized row components for the new unified itinerary system:
- DayHeaderRow: Day number, date display, and add item button
- GameItemRow: Prominent card with sport color bar for games
- TravelItemRow: Gold-styled travel segments with drag handle
- CustomItemRow: Minimal custom items with icon, title, and optional time

All views follow existing Theme patterns and use SportColorBar for consistency.

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

SportsTime/Features/Trip/Views/ItineraryRows/CustomItemRow.swift

@@ -0,0 +1,81 @@
+//
+//  CustomItemRow.swift
+//  SportsTime
+//
+//  Row view for displaying custom user-added items in the itinerary.
+//  Minimal styling with drag handle for reordering.
+//
+
+import SwiftUI
+
+struct CustomItemRow: View {
+    let item: ItineraryItem
+    let onTap: () -> Void
+
+    @Environment(\.colorScheme) private var colorScheme
+
+    private var customInfo: CustomInfo? {
+        item.customInfo
+    }
+
+    var body: some View {
+        Button(action: onTap) {
+            HStack(spacing: Theme.Spacing.md) {
+                // Drag handle
+                Image(systemName: "line.3.horizontal")
+                    .font(.title3)
+                    .foregroundStyle(Theme.textMuted(colorScheme))
+
+                // Icon
+                if let info = customInfo {
+                    Text(info.icon)
+                        .font(.title3)
+                }
+
+                // Title
+                if let info = customInfo {
+                    Text(info.title)
+                        .font(.body)
+                        .foregroundStyle(Theme.textPrimary(colorScheme))
+                }
+
+                Spacer()
+
+                // Time (if set)
+                if let time = customInfo?.time {
+                    Text(time.formatted(.dateTime.hour().minute()))
+                        .font(.caption)
+                        .foregroundStyle(Theme.textSecondary(colorScheme))
+                }
+            }
+            .padding(.vertical, Theme.Spacing.sm)
+            .padding(.horizontal, Theme.Spacing.md)
+        }
+        .buttonStyle(.plain)
+    }
+}
+
+#Preview {
+    let customInfo = CustomInfo(
+        title: "Dinner at Pizzeria",
+        icon: "\u{1F355}",
+        time: Date()
+    )
+    let item = ItineraryItem(
+        tripId: UUID(),
+        day: 1,
+        sortOrder: 2.0,
+        kind: .custom(customInfo)
+    )
+
+    VStack(spacing: 16) {
+        CustomItemRow(item: item, onTap: {})
+
+        // Without time
+        let noTimeInfo = CustomInfo(title: "Visit Museum", icon: "\u{1F3DB}", time: nil)
+        let noTimeItem = ItineraryItem(tripId: UUID(), day: 1, sortOrder: 3.0, kind: .custom(noTimeInfo))
+        CustomItemRow(item: noTimeItem, onTap: {})
+    }
+    .padding()
+    .background(Color.gray.opacity(0.1))
+}