fix: 5 failing UI tests — scroll direction, sport availability race, launch args, demo toggle conflict

- Screens.swift: selectPlanningMode scrolls UP (modes are at top of wizard)
- TripWizardFlowTests: F040 selects sport before dates to avoid async
  availability check disabling MLB for December off-season
- SportsTimeUITests: add --ui-testing/--disable-animations/--reset-state
  launch args to accessibility, demo, and manual flow tests
- Demo test: remove -DemoMode flag that caused double-toggle (demo
  auto-selects + manual taps toggled sports/regions off)
- Manual test: replace blind swipes with scrollIntoView + wait-for-enabled
  for Plan button; use waitForExistence for trip card selection

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

SportsTimeUITests/Tests/TripWizardFlowTests.swift

@@ -273,14 +273,20 @@ final class TripWizardFlowTests: BaseUITestCase {
         let (_, wizard) = openWizard()
         wizard.selectDateRangeMode()
 
-        // Pick December 2026 — MLB off-season, no games expected
+        // Select sport BEFORE dates so the async sport-availability check
+        // (triggered by date selection) doesn't disable the button.
+        wizard.selectSport("mlb")
+
+        // Pick December 2026 — MLB off-season, no games expected.
+        // Scroll up to the dates section first since sport step is below dates.
+        wizard.monthLabel.scrollIntoView(in: app.scrollViews.firstMatch, direction: .up)
         wizard.selectDateRange(
             targetMonth: "December",
             targetYear: "2026",
             startDay: "2026-12-01",
             endDay: "2026-12-07"
         )
-        wizard.selectSport("mlb")
+        wizard.selectRegion("central")
 
         wizard.tapPlanTrip()