Fix remaining 12 UI test failures: subscription state, hittability, tab selection

- IAPManager: add resetForTesting() to discard stale cached subscription state
- UITestMode: call resetForTesting() after clearing defaults (fixes 5 banner tests)
- StabilityTests: use NSPredicate wait for isSelected (iOS 26 Liquid Glass)
- SettingsActionTests: use coordinate tap for clear data and analytics toggle
- IconPackTests: add horizontal scroll fallback for off-screen icon packs

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

Tests iOS/IconPackTests.swift

@@ -36,7 +36,11 @@ final class IconPackTests: BaseUITestCase {
         for pack in allIconPacks {
             let button = app.buttons["customize_iconpack_\(pack)"]
             if !button.exists {
-                // Scroll more to reveal buttons off-screen
+                // Icon packs may be in a horizontal scroll — try swipe left first
+                app.swipeLeft()
+            }
+            if !button.exists {
+                // If still not found, try scrolling the page down
                 app.swipeUp()
             }
             if button.waitForExistence(timeout: 3) {

Tests iOS/SettingsActionTests.swift

@@ -47,7 +47,7 @@ final class SettingsActionTests: BaseUITestCase {
             return
         }
 
-        clearButton.tap()
+        clearButton.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
 
         // Navigate back to Day tab
         tabBar.tapDay()
@@ -94,7 +94,7 @@ final class SettingsActionTests: BaseUITestCase {
         }
 
         // Tap the toggle
-        analyticsToggle.tap()
+        analyticsToggle.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
 
         captureScreenshot(name: "analytics_toggled")
     }

Tests iOS/StabilityTests.swift

@@ -15,7 +15,7 @@ final class StabilityTests: BaseUITestCase {
         let tabBar = TabBarScreen(app: app)
 
         // 1. Day tab (default) - verify loaded
-        XCTAssertTrue(tabBar.dayTab.isSelected, "Should start on Day tab")
+        assertTabSelected(tabBar.dayTab, name: "Day (initial)")
         captureScreenshot(name: "stability_day")
 
         // 2. Open entry detail
@@ -34,22 +34,22 @@ final class StabilityTests: BaseUITestCase {
 
         // 3. Month tab
         tabBar.tapMonth()
-        XCTAssertTrue(tabBar.monthTab.isSelected, "Month tab should be selected")
+        assertTabSelected(tabBar.monthTab, name: "Month")
         captureScreenshot(name: "stability_month")
 
         // 4. Year tab
         tabBar.tapYear()
-        XCTAssertTrue(tabBar.yearTab.isSelected, "Year tab should be selected")
+        assertTabSelected(tabBar.yearTab, name: "Year")
         captureScreenshot(name: "stability_year")
 
         // 5. Insights tab
         tabBar.tapInsights()
-        XCTAssertTrue(tabBar.insightsTab.isSelected, "Insights tab should be selected")
+        assertTabSelected(tabBar.insightsTab, name: "Insights")
         captureScreenshot(name: "stability_insights")
 
         // 6. Settings tab - Customize sub-tab
         tabBar.tapSettings()
-        XCTAssertTrue(tabBar.settingsTab.isSelected, "Settings tab should be selected")
+        assertTabSelected(tabBar.settingsTab, name: "Settings")
         captureScreenshot(name: "stability_settings_customize")
 
         // 7. Settings tab - Settings sub-tab
@@ -63,8 +63,16 @@ final class StabilityTests: BaseUITestCase {
 
         // 9. Back to Day
         tabBar.tapDay()
-        XCTAssertTrue(tabBar.dayTab.isSelected, "Day tab should be selected")
+        assertTabSelected(tabBar.dayTab, name: "Day")
 
         captureScreenshot(name: "stability_full_navigation_complete")
     }
+
+    /// Wait for a tab to become selected (iOS 26 Liquid Glass may delay state updates).
+    private func assertTabSelected(_ tab: XCUIElement, name: String, timeout: TimeInterval = 3) {
+        let predicate = NSPredicate(format: "isSelected == true")
+        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: tab)
+        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
+        XCTAssertEqual(result, .completed, "\(name) tab should be selected")
+    }
 }