feat: add XCUITest suite with 10 critical flow tests and QA test plan

Add comprehensive UI test infrastructure with Page Object pattern,
accessibility identifiers, UI test mode (--ui-testing, --reset-state,
--disable-animations), and 10 passing tests covering app launch, tab
navigation, trip wizard, trip saving, settings, schedule, and
accessibility at XXXL Dynamic Type. Also adds a 229-case QA test plan
Excel workbook for manual QA handoff.

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

SportsTimeUITests/Tests/TripSavingTests.swift

@@ -0,0 +1,66 @@
+//
+//  TripSavingTests.swift
+//  SportsTimeUITests
+//
+//  Tests the end-to-end trip saving flow: plan → select → save → verify in My Trips.
+//
+
+import XCTest
+
+final class TripSavingTests: BaseUITestCase {
+
+    /// Plans a trip, selects an option, saves it, and verifies it appears in My Trips.
+    @MainActor
+    func testSaveTripAppearsInMyTrips() {
+        let home = HomeScreen(app: app)
+        home.waitForLoad()
+        home.tapStartPlanning()
+
+        // Plan a trip using date range mode
+        let wizard = TripWizardScreen(app: app)
+        wizard.waitForLoad()
+        wizard.selectDateRangeMode()
+
+        wizard.nextMonthButton.scrollIntoView(in: app.scrollViews.firstMatch)
+        wizard.selectDateRange(
+            targetMonth: "June",
+            targetYear: "2026",
+            startDay: "2026-06-11",
+            endDay: "2026-06-16"
+        )
+        wizard.selectSport("mlb")
+        wizard.selectRegion("central")
+        wizard.tapPlanTrip()
+
+        // Select first trip option
+        let options = TripOptionsScreen(app: app)
+        options.waitForLoad()
+        options.selectTrip(at: 0)
+
+        // Save the trip
+        let detail = TripDetailScreen(app: app)
+        detail.waitForLoad()
+        detail.assertSaveState(isSaved: false)
+        detail.tapFavorite()
+
+        // Allow save to persist
+        detail.assertSaveState(isSaved: true)
+
+        captureScreenshot(named: "TripSaving-Favorited")
+
+        // Navigate back to My Trips tab
+        // Dismiss the entire wizard sheet: Detail → Options → Wizard → Cancel
+        app.navigationBars.buttons.firstMatch.tap()  // Back from detail to options
+        // Back from options to wizard
+        let wizardBackBtn = app.navigationBars.buttons.firstMatch
+        wizardBackBtn.waitUntilHittable(timeout: BaseUITestCase.shortTimeout).tap()
+        // Cancel the wizard sheet
+        wizard.tapCancel()
+        // Now the tab bar is accessible
+        home.switchToTab(home.myTripsTab)
+
+        // Assert: Saved trip appears (empty state should NOT be visible)
+        let myTrips = MyTripsScreen(app: app)
+        myTrips.assertHasTrips()
+    }
+}