fix(wizard): enable Plan My Trip button with default values

- Add debug toggle in Settings to override Pro subscription status (DEBUG builds only, defaults to true)
- Auto-validate wizard step flags on appear so button enables without explicit user interaction:
  - DatesStep: calls updateHasSetDates() on appear
  - RoutePreferenceStep: sets hasSetRoutePreference on appear
  - RepeatCitiesStep: sets hasSetRepeatCities on appear

Previously, canPlanTrip required all flags to be explicitly set by user interaction, even when valid defaults were showing.

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

SportsTime/Features/Settings/Views/SettingsView.swift

@@ -260,6 +260,13 @@ struct SettingsView: View {
     #if DEBUG
     private var debugSection: some View {
         Section {
+            Toggle(isOn: Binding(
+                get: { StoreManager.shared.debugProOverride },
+                set: { StoreManager.shared.debugProOverride = $0 }
+            )) {
+                Label("Override Pro Status", systemImage: "star.fill")
+            }
+
             Button {
                 showOnboardingPaywall = true
             } label: {