Fix remaining 17 UI test failures: group defaults, identifiers, hittability, date format

- resetAppState: use correct suite name to clear group defaults (fixes stale subscription state)
- Reorder configureIfNeeded: set expireTrial before IAPManager init
- Add browse_themes_button identifier to CustomizeView Browse Themes button
- Add mood_button_* identifiers to Entry Detail mood grid in NoteEditorView
- Use coordinate-based tap throughout all test screens (iOS 26 Liquid Glass hittability)
- Fix HeaderMoodLogging date format: M/d/yyyy → yyyy/MM/dd to match entry_row identifiers
- AppLaunchTests: wait for isSelected state with NSPredicate instead of immediate check
- OnboardingTests: add waits between swipes and retry logic for skip button

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

Tests iOS/CustomizationTests.swift

@@ -24,8 +24,7 @@ final class CustomizationTests: BaseUITestCase {
         for themeName in themeNames {
             let button = app.buttons["customize_theme_\(themeName.lowercased())"]
             if button.waitForExistence(timeout: 3) {
-                button.tap()
-                // Brief pause for theme to apply
+                button.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
             }
         }
 
@@ -44,12 +43,12 @@ final class CustomizationTests: BaseUITestCase {
         for layout in layouts {
             let button = app.buttons["customize_voting_\(layout.lowercased())"]
             if button.waitForExistence(timeout: 2) {
-                button.tap()
+                button.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
             } else {
                 // Scroll right to find it
                 app.swipeLeft()
                 if button.waitForExistence(timeout: 2) {
-                    button.tap()
+                    button.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
                 }
             }
         }
@@ -77,12 +76,12 @@ final class CustomizationTests: BaseUITestCase {
         for style in styles {
             let button = app.buttons["customize_daystyle_\(style.lowercased())"]
             if button.waitForExistence(timeout: 2) {
-                button.tap()
+                button.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
             } else {
                 // Scroll to find it
                 app.swipeLeft()
                 if button.waitForExistence(timeout: 2) {
-                    button.tap()
+                    button.coordinate(withNormalizedOffset: CGVector(dx: 0.5, dy: 0.5)).tap()
                 }
             }
         }