Add region-based filtering and route length diversity

- Add RegionMapSelector UI for geographic trip filtering (East/Central/West)
- Add RouteFilters module for allowRepeatCities preference
- Improve GameDAGRouter to preserve route length diversity
  - Routes now grouped by city count before scoring
  - Ensures 2-city trips appear alongside longer trips
  - Increased beam width and max options for better coverage
- Add TripOptionsView filters (max cities slider, pace filter)
- Remove TravelStyle section from trip creation (replaced by region selector)
- Clean up debug logging from DataProvider and ScenarioAPlanner

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

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

SportsTime/Core/Models/Domain/Region.swift

@@ -7,7 +7,7 @@
 
 import Foundation
 
-enum Region: String, CaseIterable, Identifiable {
+enum Region: String, CaseIterable, Identifiable, Codable, Hashable {
     case east = "East Coast"
     case central = "Central"
     case west = "West Coast"

SportsTime/Core/Models/Domain/TripPreferences.swift

@@ -227,7 +227,8 @@ struct TripPreferences: Codable, Hashable {
     var lodgingType: LodgingType
     var numberOfDrivers: Int
     var maxDrivingHoursPerDriver: Double?
-    var maxTripOptions: Int
+    var allowRepeatCities: Bool
+    var selectedRegions: Set<Region>
 
     init(
         planningMode: PlanningMode = .dateRange,
@@ -248,7 +249,8 @@ struct TripPreferences: Codable, Hashable {
         lodgingType: LodgingType = .hotel,
         numberOfDrivers: Int = 1,
         maxDrivingHoursPerDriver: Double? = nil,
-        maxTripOptions: Int = 10
+        allowRepeatCities: Bool = true,
+        selectedRegions: Set<Region> = [.east, .central, .west]
     ) {
         self.planningMode = planningMode
         self.startLocation = startLocation
@@ -268,7 +270,8 @@ struct TripPreferences: Codable, Hashable {
         self.lodgingType = lodgingType
         self.numberOfDrivers = numberOfDrivers
         self.maxDrivingHoursPerDriver = maxDrivingHoursPerDriver
-        self.maxTripOptions = maxTripOptions
+        self.allowRepeatCities = allowRepeatCities
+        self.selectedRegions = selectedRegions
     }
 
     var totalDriverHoursPerDay: Double {