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/AppLaunchTests.swift

@@ -0,0 +1,38 @@
+//
+//  AppLaunchTests.swift
+//  SportsTimeUITests
+//
+//  Verifies app boot, bootstrap, and initial screen rendering.
+//
+
+import XCTest
+
+final class AppLaunchTests: BaseUITestCase {
+
+    /// Verifies the app boots, shows the home screen, and all 5 tabs are present.
+    @MainActor
+    func testAppLaunchShowsHomeWithAllTabs() {
+        let home = HomeScreen(app: app)
+        home.waitForLoad()
+
+        // Assert: Hero card text visible
+        XCTAssertTrue(home.adventureAwaitsText.exists,
+                       "Hero card should display 'Adventure Awaits'")
+
+        // Assert: All tabs present
+        home.assertTabBarVisible()
+
+        captureScreenshot(named: "HomeScreen-Launch")
+    }
+
+    /// Verifies the bootstrap loading indicator disappears and content renders.
+    @MainActor
+    func testBootstrapCompletesWithContent() {
+        let home = HomeScreen(app: app)
+        home.waitForLoad()
+
+        // Assert: Start Planning button is interactable (proves bootstrap loaded data)
+        XCTAssertTrue(home.startPlanningButton.isHittable,
+                       "Start Planning should be hittable after bootstrap")
+    }
+}