Add 3 passing UI tests (batch 4): personality pack, Spanish locale, accessibility text size

- TC-052: Personality pack selection in Customize tab with accessibility IDs
- TC-137: Spanish localization verification (Ajustes, tab labels)
- TC-142: App navigable at XXL accessibility text size

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

Tests iOS/AccessibilityTextSizeTests.swift

@@ -0,0 +1,62 @@
+//
+//  AccessibilityTextSizeTests.swift
+//  Tests iOS
+//
+//  TC-142: App remains functional at largest accessibility text size.
+//
+
+import XCTest
+
+final class AccessibilityTextSizeTests: BaseUITestCase {
+    override var seedFixture: String? { "single_mood" }
+    override var bypassSubscription: Bool { true }
+
+    override func setUp() {
+        // Do NOT call super — we need custom content size launch args
+        continueAfterFailure = false
+
+        let application = XCUIApplication()
+        var args: [String] = [
+            "--ui-testing", "--disable-animations",
+            "--reset-state",
+            "--bypass-subscription",
+            "--skip-onboarding",
+            "-AppleLanguages", "(en)",
+            "-AppleLocale", "en_US",
+            "-UIPreferredContentSizeCategoryName", "UICTContentSizeCategoryAccessibilityXXL"
+        ]
+        application.launchArguments = args
+        application.launchEnvironment = ["UI_TEST_FIXTURE": "single_mood"]
+        application.launch()
+        app = application
+    }
+
+    /// TC-142: App launches and is navigable at largest accessibility text size.
+    func testLargestTextSize_AppRemainsNavigable() {
+        // Verify Day tab is loaded and has content
+        assertDayContentVisible()
+
+        captureScreenshot(name: "accessibility_xxl_day")
+
+        // Navigate through all tabs to verify nothing crashes
+        let tabBar = TabBarScreen(app: app)
+
+        tabBar.tapMonth()
+        XCTAssertTrue(
+            tabBar.monthTab.waitForExistence(timeout: 5),
+            "Month tab should be accessible at XXL text size"
+        )
+        captureScreenshot(name: "accessibility_xxl_month")
+
+        tabBar.tapYear()
+        XCTAssertTrue(
+            tabBar.yearTab.waitForExistence(timeout: 5),
+            "Year tab should be accessible at XXL text size"
+        )
+        captureScreenshot(name: "accessibility_xxl_year")
+
+        let settingsScreen = tabBar.tapSettings()
+        settingsScreen.assertVisible()
+        captureScreenshot(name: "accessibility_xxl_settings")
+    }
+}