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/TripWizardFlowTests.swift

@@ -0,0 +1,71 @@
+//
+//  TripWizardFlowTests.swift
+//  SportsTimeUITests
+//
+//  Tests the trip planning wizard: date range mode, calendar navigation,
+//  sport/region selection, and planning engine results.
+//
+
+import XCTest
+
+final class TripWizardFlowTests: BaseUITestCase {
+
+    /// Full flow: Start Planning → Date Range → Select dates → MLB → Central → Plan.
+    /// Asserts the planning engine returns results.
+    @MainActor
+    func testDateRangeTripPlanningFlow() {
+        let home = HomeScreen(app: app)
+        home.waitForLoad()
+        home.tapStartPlanning()
+
+        let wizard = TripWizardScreen(app: app)
+        wizard.waitForLoad()
+
+        // Step 1: Select "By Dates" mode
+        wizard.selectDateRangeMode()
+
+        // Step 2: Navigate to June 2026 and select June 11-16
+        // Scroll to see dates step
+        wizard.nextMonthButton.scrollIntoView(in: app.scrollViews.firstMatch)
+        wizard.selectDateRange(
+            targetMonth: "June",
+            targetYear: "2026",
+            startDay: "2026-06-11",
+            endDay: "2026-06-16"
+        )
+
+        // Step 3: Select MLB
+        wizard.selectSport("mlb")
+
+        // Step 4: Select Central region
+        wizard.selectRegion("central")
+
+        // Step 5: Tap Plan My Trip
+        wizard.tapPlanTrip()
+
+        // Assert: Trip Options screen appears with results
+        let options = TripOptionsScreen(app: app)
+        options.waitForLoad()
+        options.assertHasResults()
+
+        captureScreenshot(named: "TripWizard-PlanningResults")
+    }
+
+    /// Verifies the wizard can be dismissed via Cancel.
+    @MainActor
+    func testWizardCanBeDismissed() {
+        let home = HomeScreen(app: app)
+        home.waitForLoad()
+        home.tapStartPlanning()
+
+        let wizard = TripWizardScreen(app: app)
+        wizard.waitForLoad()
+        wizard.tapCancel()
+
+        // Assert: Back on home screen
+        XCTAssertTrue(
+            home.startPlanningButton.waitForExistence(timeout: BaseUITestCase.defaultTimeout),
+            "Should return to Home after cancelling wizard"
+        )
+    }
+}