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/Trip/Views/Wizard/Steps/RepeatCitiesStep.swift

@@ -48,6 +48,12 @@ struct RepeatCitiesStep: View {
             RoundedRectangle(cornerRadius: Theme.CornerRadius.large)
                 .stroke(Theme.surfaceGlow(colorScheme), lineWidth: 1)
         }
+        .onAppear {
+            // Auto-select the default if not already set (enables button with defaults)
+            if !hasSetRepeatCities {
+                hasSetRepeatCities = true
+            }
+        }
     }
 }