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/SpanishLocalizationTests.swift

@@ -0,0 +1,68 @@
+//
+//  SpanishLocalizationTests.swift
+//  Tests iOS
+//
+//  TC-137: Spanish localization displays correctly.
+//
+
+import XCTest
+
+final class SpanishLocalizationTests: BaseUITestCase {
+    override var seedFixture: String? { "week_of_moods" }
+    override var bypassSubscription: Bool { true }
+
+    override func setUp() {
+        // Do NOT call super — we need custom language launch args
+        continueAfterFailure = false
+
+        let application = XCUIApplication()
+        let args: [String] = [
+            "--ui-testing", "--disable-animations",
+            "--reset-state",
+            "--bypass-subscription",
+            "--skip-onboarding",
+            "-AppleLanguages", "(es)",
+            "-AppleLocale", "es_ES"
+        ]
+        application.launchArguments = args
+        application.launchEnvironment = ["UI_TEST_FIXTURE": "week_of_moods"]
+        application.launch()
+        app = application
+    }
+
+    /// TC-137: Key Spanish strings appear when launched in Spanish locale.
+    func testSpanishLocale_DisplaysSpanishStrings() {
+        // Day tab should load with data
+        let tabBar = app.tabBars.firstMatch
+        XCTAssertTrue(tabBar.waitForExistence(timeout: 5), "Tab bar should exist")
+
+        captureScreenshot(name: "spanish_day_tab")
+
+        // Tap the Settings tab by its Spanish label "Ajustes"
+        let settingsTabButton = app.tabBars.buttons["Ajustes"]
+        XCTAssertTrue(
+            settingsTabButton.waitForExistence(timeout: 5),
+            "Settings tab should show Spanish label 'Ajustes'"
+        )
+        settingsTabButton.tap()
+
+        // Verify Settings header is visible via accessibility ID
+        let settingsHeader = app.element(UITestID.Settings.header)
+        XCTAssertTrue(
+            settingsHeader.waitForExistence(timeout: 5),
+            "Settings header should be visible"
+        )
+
+        // Verify Spanish text "Ajustes" appears as a static text on screen
+        let ajustesText = app.staticTexts.matching(
+            NSPredicate(format: "label == %@", "Ajustes")
+        ).firstMatch
+
+        XCTAssertTrue(
+            ajustesText.waitForExistence(timeout: 5),
+            "Settings should display 'Ajustes' in Spanish locale"
+        )
+
+        captureScreenshot(name: "spanish_settings_tab")
+    }
+}