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>

SportsTime/Features/Home/Views/Variants/Classic/HomeContent_ClassicAnimated.swift

@@ -82,6 +82,7 @@ struct HomeContent_ClassicAnimated: View {
             }
             .pressableStyle()
             .glowEffect(color: Theme.warmOrange, radius: 12)
+            .accessibilityIdentifier("home.startPlanningButton")
         }
         .padding(Theme.Spacing.lg)
         .background(Theme.cardBackground(colorScheme))