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/Settings/Views/SettingsView.swift

@@ -317,6 +317,7 @@ struct SettingsView: View {
                         .accessibilityHidden(true)
                 }
             }
+        .accessibilityIdentifier("settings.analyticsToggle")
         } header: {
             Text("Privacy")
         } footer: {
@@ -334,6 +335,7 @@ struct SettingsView: View {
                 Spacer()
                 Text("\(viewModel.appVersion) (\(viewModel.buildNumber))")
                     .foregroundStyle(.secondary)
+                    .accessibilityIdentifier("settings.versionLabel")
             }
 
             Link(destination: URL(string: "https://sportstime.88oakapps.com/privacy.html")!) {