Initial commit: SportsTime trip planning app

- Three-scenario planning engine (A: date range, B: selected games, C: directional routes)
- GeographicRouteExplorer with anchor game support for route exploration
- Shared ItineraryBuilder for travel segment calculation
- TravelEstimator for driving time/distance estimation
- SwiftUI views for trip creation and detail display
- CloudKit integration for schedule data
- Python scraping scripts for sports schedules

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

SportsTime/Planning/Engine/ScenarioPlanner.swift

@@ -0,0 +1,49 @@
+//
+//  ScenarioPlanner.swift
+//  SportsTime
+//
+//  Protocol for scenario-based trip planning.
+//
+
+import Foundation
+
+/// Protocol that all scenario planners must implement.
+/// Each scenario (A, B, C) has its own isolated implementation.
+protocol ScenarioPlanner {
+
+    /// Plan itineraries for this scenario.
+    /// - Parameter request: The planning request with all inputs
+    /// - Returns: Success with ranked itineraries, or explicit failure
+    func plan(request: PlanningRequest) -> ItineraryResult
+}
+
+/// Factory for creating the appropriate scenario planner
+enum ScenarioPlannerFactory {
+
+    /// Creates the appropriate planner based on the request inputs
+    static func planner(for request: PlanningRequest) -> ScenarioPlanner {
+        // Scenario B: User selected specific games
+        if !request.selectedGames.isEmpty {
+            return ScenarioBPlanner()
+        }
+
+        // Scenario C: User specified start and end locations
+        if request.startLocation != nil && request.endLocation != nil {
+            return ScenarioCPlanner()
+        }
+
+        // Scenario A: Date range only (default)
+        return ScenarioAPlanner()
+    }
+
+    /// Classifies which scenario applies to this request
+    static func classify(_ request: PlanningRequest) -> PlanningScenario {
+        if !request.selectedGames.isEmpty {
+            return .scenarioB
+        }
+        if request.startLocation != nil && request.endLocation != nil {
+            return .scenarioC
+        }
+        return .scenarioA
+    }
+}