updated UserDefaults demo to not use AppVersionKey

Signed-off-by: Matt Bruce <mbrucedogs@gmail.com>

SecureStorageSample/Services/AppStorageCatalog.swift

@@ -10,6 +10,7 @@ struct AppStorageCatalog: StorageKeyCatalog {
         // Order here is purely for readability in audit reports.
         [
             .key(.appVersion),
+            .key(.userDefaultsDemoValue),
             .key(.userPreferences),
             .key(.credentials),
             .key(.lastLocation),

SecureStorageSample/StorageKeys/UserDefaults/AppVersionKey.swift

@@ -1,7 +1,7 @@
 import Foundation
 import LocalData
 
-/// UserDefaults key used in the demo and as a lightweight migration flag.
+/// UserDefaults key used as a lightweight migration flag.
 extension StorageKey where Value == String {
     /// Stores the app version in standard UserDefaults.
     /// - Domain: UserDefaults (standard)

SecureStorageSample/StorageKeys/UserDefaults/UserDefaultsDemoValueKey.swift

@@ -0,0 +1,20 @@
+import Foundation
+import LocalData
+
+/// UserDefaults key used exclusively by the UserDefaults demo screen.
+extension StorageKey where Value == String {
+    /// Stores a demo value in standard UserDefaults.
+    /// - Domain: UserDefaults (standard)
+    /// - Security: None
+    /// - Sync: Automatic for small data
+    nonisolated static let userDefaultsDemoValue = StorageKey(
+        name: "user_defaults_demo_value",
+        domain: .userDefaults(suite: nil),
+        security: .none,
+        serializer: .json,
+        owner: "SampleApp",
+        description: "Stores a demo value for the UserDefaults screen.",
+        availability: .all,
+        syncPolicy: .automaticSmall
+    )
+}

SecureStorageSample/Views/UserDefaultsDemo.swift

@@ -142,7 +142,7 @@ struct UserDefaultsDemo: View {
         isLoading = true
         Task {
             do {
-                let key = StorageKey.appVersion
+                let key = StorageKey.userDefaultsDemoValue
                 try await StorageRouter.shared.set(inputText, for: key)
                 statusMessage = "✓ Saved successfully"
             } catch {
@@ -157,7 +157,7 @@ struct UserDefaultsDemo: View {
         isLoading = true
         Task {
             do {
-                let key = StorageKey.appVersion
+                let key = StorageKey.userDefaultsDemoValue
                 let value = try await StorageRouter.shared.get(key)
                 storedValue = value
                 inputText = value // Sync to field
@@ -177,7 +177,7 @@ struct UserDefaultsDemo: View {
         isLoading = true
         Task {
             do {
-                let key = StorageKey.appVersion
+                let key = StorageKey.userDefaultsDemoValue
                 try await StorageRouter.shared.remove(key)
                 storedValue = ""
                 statusMessage = "✓ Removed successfully"