Add XCUITest suite with 27 test files covering unmapped P1 test cases

- Add 8 new test files: HeaderMoodLogging (TC-002), DayViewGrouping (TC-019),
  AllDayViewStyles (TC-021), MonthViewInteraction (TC-030), PaywallGate
  (TC-032/039/048), AppTheme (TC-070), IconPack (TC-072),
  PremiumCustomization (TC-075)
- Add accessibility IDs for paywall overlays, icon packs, app theme cards,
  and day view section headers
- Add --expire-trial launch argument to UITestMode for paywall gate testing
- Update QA test plan spreadsheet with XCUITest names for 14 test cases
- Include existing test infrastructure: screen objects, helpers, base class,
  and 19 previously written test files

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

Tests iOS/OnboardingTests.swift

@@ -0,0 +1,130 @@
+//
+//  OnboardingTests.swift
+//  Tests iOS
+//
+//  Onboarding flow completion and non-repetition tests.
+//
+
+import XCTest
+
+final class OnboardingTests: BaseUITestCase {
+    override var seedFixture: String? { "empty" }
+    override var skipOnboarding: Bool { false }
+
+    /// TC-120: Complete the full onboarding flow.
+    func testOnboarding_CompleteFlow() {
+        // Welcome screen should appear
+        let welcomeText = app.staticTexts.matching(
+            NSPredicate(format: "label CONTAINS[cd] %@", "Welcome to Feels")
+        ).firstMatch
+        XCTAssertTrue(
+            welcomeText.waitForExistence(timeout: 10),
+            "Welcome screen should appear on first launch"
+        )
+
+        captureScreenshot(name: "onboarding_welcome")
+
+        // Swipe to Time screen
+        app.swipeLeft()
+
+        captureScreenshot(name: "onboarding_time")
+
+        // Swipe to Day screen
+        app.swipeLeft()
+
+        // Select "Today" if the button exists
+        let todayButton = app.descendants(matching: .any)
+            .matching(identifier: "onboarding_day_today")
+            .firstMatch
+        if todayButton.waitForExistence(timeout: 3) {
+            todayButton.tap()
+        }
+
+        captureScreenshot(name: "onboarding_day")
+
+        // Swipe to Style screen
+        app.swipeLeft()
+
+        captureScreenshot(name: "onboarding_style")
+
+        // Swipe to Subscription screen
+        app.swipeLeft()
+
+        captureScreenshot(name: "onboarding_subscription")
+
+        // Tap "Maybe Later" to complete onboarding
+        let skipButton = app.descendants(matching: .any)
+            .matching(identifier: "onboarding_skip_button")
+            .firstMatch
+        XCTAssertTrue(
+            skipButton.waitForExistence(timeout: 5),
+            "Skip/Maybe Later button should exist on subscription screen"
+        )
+        skipButton.tap()
+
+        // After onboarding, the tab bar should appear
+        let tabBar = app.tabBars.firstMatch
+        XCTAssertTrue(
+            tabBar.waitForExistence(timeout: 10),
+            "Tab bar should be visible after completing onboarding"
+        )
+
+        captureScreenshot(name: "onboarding_complete")
+    }
+
+    /// TC-121: After completing onboarding, relaunch should go directly to Day view.
+    func testOnboarding_DoesNotRepeatAfterCompletion() {
+        // First, complete onboarding
+        let welcomeText = app.staticTexts.matching(
+            NSPredicate(format: "label CONTAINS[cd] %@", "Welcome to Feels")
+        ).firstMatch
+
+        if welcomeText.waitForExistence(timeout: 5) {
+            // Swipe through all screens
+            app.swipeLeft() // -> Time
+            app.swipeLeft() // -> Day
+            app.swipeLeft() // -> Style
+            app.swipeLeft() // -> Subscription
+
+            let skipButton = app.descendants(matching: .any)
+                .matching(identifier: "onboarding_skip_button")
+                .firstMatch
+            if skipButton.waitForExistence(timeout: 5) {
+                skipButton.tap()
+            }
+        }
+
+        // Wait for main app to load
+        let tabBar = app.tabBars.firstMatch
+        XCTAssertTrue(
+            tabBar.waitForExistence(timeout: 10),
+            "Tab bar should appear after onboarding"
+        )
+
+        // Terminate and relaunch (keeping --reset-state OUT to preserve onboarding completion)
+        app.terminate()
+
+        // Relaunch WITHOUT reset-state so onboarding completion is preserved
+        let freshApp = XCUIApplication()
+        freshApp.launchArguments = ["--ui-testing", "--disable-animations", "--bypass-subscription", "--skip-onboarding"]
+        freshApp.launch()
+
+        // Tab bar should appear immediately (no onboarding)
+        let freshTabBar = freshApp.tabBars.firstMatch
+        XCTAssertTrue(
+            freshTabBar.waitForExistence(timeout: 10),
+            "Tab bar should appear immediately on relaunch (no onboarding)"
+        )
+
+        // Welcome screen should NOT appear
+        let welcomeAgain = freshApp.staticTexts.matching(
+            NSPredicate(format: "label CONTAINS[cd] %@", "Welcome to Feels")
+        ).firstMatch
+        XCTAssertFalse(
+            welcomeAgain.waitForExistence(timeout: 2),
+            "Onboarding should not appear on second launch"
+        )
+
+        captureScreenshot(name: "no_onboarding_on_relaunch")
+    }
+}