Fix 23 failing UI tests: accessibility hierarchy, test mode, and interaction issues

App fixes:
- Remove empty_state identifier from EmptyHomeView VStack (was overriding mood_header)
- Fix resetAppState to set needsOnboarding=true (fresh state) instead of false
- Set bypassSubscription explicitly based on launch arg presence (was defaulting to true in DEBUG)

Test fixes:
- TabBarScreen: use coordinate tap to avoid iOS 26 Liquid Glass hittability issues
- SettingsScreen: use coordinate tap for segments, handle Settings label ambiguity with tab bar
- EntryDetailScreen: use mood_button_ identifiers instead of label matching (was matching entry rows)

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

Tests iOS/Screens/EntryDetailScreen.swift

@@ -18,9 +18,9 @@ struct EntryDetailScreen {
     var moodGrid: XCUIElement { app.otherElements["entry_detail_mood_grid"] }
 
     /// Mood buttons inside the detail sheet's mood grid.
-    /// These use accessibilityLabel (the mood name text), not identifiers.
-    func moodButton(label: String) -> XCUIElement {
-        app.buttons.matching(NSPredicate(format: "label CONTAINS[cd] %@", label)).firstMatch
+    /// Match by the mood_button_ identifier prefix to avoid matching entry rows.
+    func moodButton(for mood: MoodChoice) -> XCUIElement {
+        app.buttons["mood_button_\(mood.rawValue)"]
     }
 
     // MARK: - Actions
@@ -30,7 +30,7 @@ struct EntryDetailScreen {
     }
 
     func selectMood(_ mood: MoodChoice) {
-        let button = moodButton(label: mood.rawValue.capitalized)
+        let button = moodButton(for: mood)
         button.tapWhenReady()
     }