Refactor travel segments and simplify trip options

Travel segment architecture:
- Remove departureTime/arrivalTime from TravelSegment (location-based, not date-based)
- Fix travel sections appearing after destination instead of between cities
- Fix missing travel segments when revisiting same city (consecutive grouping)
- Remove unwanted rest day at end of trip

Planning engine fixes:
- All three planners now group only consecutive games at same stadium
- Visiting A → B → A creates 3 stops with proper travel between

UI simplification:
- Remove redundant sort options (mostDriving/leastDriving, mostCities/leastCities)
- Remove unused "Find Other Sports Along Route" toggle (was dead code)

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

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

SportsTimeTests/ScenarioCPlannerTests.swift

@@ -1794,45 +1794,9 @@ struct ScenarioCPlannerTests {
         }
     }
 
-    @Test("Departure time before arrival time")
-    func plan_DepartureBeforeArrival() {
-        let planner = ScenarioCPlanner()
-        let sd = sdStadium
-        let la = laStadium
-        let sf = sfStadium
-
-        let game = makeGame(stadiumId: la.id, date: date("2026-06-10 19:00"))
-
-        let startLoc = LocationInput(
-            name: "San Diego",
-            coordinate: CLLocationCoordinate2D(latitude: sd.latitude, longitude: sd.longitude)
-        )
-        let endLoc = LocationInput(
-            name: "San Francisco",
-            coordinate: CLLocationCoordinate2D(latitude: sf.latitude, longitude: sf.longitude)
-        )
-
-        let request = makeRequest(
-            games: [game],
-            stadiums: [sd.id: sd, la.id: la, sf.id: sf],
-            startLocation: startLoc,
-            endLocation: endLoc,
-            startDate: date("2026-06-01 00:00"),
-            endDate: date("2026-06-30 23:59")
-        )
-
-        let result = planner.plan(request: request)
-
-        if case .success(let options) = result {
-            for option in options {
-                for segment in option.travelSegments {
-                    #expect(segment.departureTime < segment.arrivalTime)
-                }
-            }
-        } else {
-            Issue.record("Expected success")
-        }
-    }
+    // Note: "Departure time before arrival time" test removed
+    // Travel segments are now location-based, not time-based
+    // The user decides when to travel; segments only describe route info
 
     @Test("Games filtered to date range")
     func plan_GamesFilteredToDateRange() {