feat: Demo app waits for experience

ConfidenceDemoApp/ConfidenceDemoApp/ContentView.swift

@@ -6,34 +6,46 @@ struct ContentView: View {
     @EnvironmentObject var status: ExperimentationFlags
     @AppStorage("loggedUser") private var loggedUser: String?
     @State var isLoggingOut: Bool = false
+    @State var loggedOut: Bool = false
 
-    private let color: Color
     private let confidence: Confidence
 
     init(confidence: Confidence) {
         self.confidence = confidence
-        self.color = ContentView.getColor(color: confidence.getValue(key: "swift-demoapp.color", defaultValue: "Gray"))
     }
 
     var body: some View {
         NavigationStack {
-            VStack {
-                Text("Hello World!")
-                    .foregroundStyle(color)
-            }
-            .padding()
-            Button("Logout") {
-                loggedUser = nil
-                status.state = .loading
-                Task {
-                    await confidence.removeContext(key: "user_id")
-                    status.state = .ready
+            if (status.state == .loading && !isLoggingOut) {
+                VStack {
+                    Spacer()
+                    Text("Welcome \(loggedUser ?? "?")")
+                    Text("We are preparing your experience...")
+                    ProgressView()
+                    Spacer()
+                }
+            } else {
+                VStack {
+                    Text("Hello World!")
+                        .font(.largeTitle)
+                        .foregroundStyle(ContentView.getColor(color: confidence.getValue(key: "swift-demoapp.color", defaultValue: "Gray")))
+                }
+                .padding()
+                Button("Logout") {
+                    isLoggingOut = true
+
+                    loggedUser = nil
+                    status.state = .loading
+                    Task {
+                        await confidence.removeContext(key: "user_id")
+                        status.state = .ready
+                    }
+                    loggedUser = nil
+                    loggedOut = true
+                }
+                .navigationDestination(isPresented: $loggedOut) {
+                    LoginView(confidence: confidence)
                 }
-                loggedUser = nil
-                isLoggingOut = true
-            }
-            .navigationDestination(isPresented: $isLoggingOut) {
-                LoginView(confidence: confidence)
             }
         }
     }