feat(ui): add critical app update screen (#148)

Author: pwltr

Bitkit/AppScene.swift

@@ -25,6 +25,11 @@ struct AppScene: View {
     @State private var isPinVerified: Bool = false
     @State private var showRecoveryScreen = false
 
+    // Check if there's a critical update available
+    private var hasCriticalUpdate: Bool {
+        AppUpdateService.shared.availableUpdate?.critical == true
+    }
+
     init() {
         let sheetViewModel = SheetViewModel()
         let navigationViewModel = NavigationViewModel()
@@ -98,6 +103,8 @@ struct AppScene: View {
             if showRecoveryScreen {
                 RecoveryRouter()
                     .accentColor(.white)
+            } else if hasCriticalUpdate {
+                AppUpdateScreen()
             } else {
                 walletContent
             }

Bitkit/Views/AppUpdateScreen.swift

@@ -0,0 +1,25 @@
+import SwiftUI
+
+struct AppUpdateScreen: View {
+    var body: some View {
+        OnboardingView(
+            navTitle: t("other__update_critical_nav_title"),
+            title: t("other__update_critical_title"),
+            description: t("other__update_critical_text"),
+            imageName: "exclamation-mark",
+            buttonText: t("other__update_critical_button"),
+            showBackButton: false,
+            showMenuButton: false,
+            onButtonPress: {
+                openAppStore()
+            },
+            imagePosition: .center,
+            testID: "CriticalUpdate"
+        )
+        .navigationBarHidden(true)
+    }
+
+    private func openAppStore() {
+        UIApplication.shared.open(URL(string: Env.appStoreUrl)!)
+    }
+}

Bitkit/Views/OnboardingView.swift

@@ -9,7 +9,9 @@ struct OnboardingView: View {
     let onButtonPress: () -> Void
 
     // Optional parameters with defaults
-    let navTitle: String?
+    let navTitle: String
+    let showBackButton: Bool
+    let showMenuButton: Bool
     let titleColor: Color
     let accentColor: Color
     let imagePosition: ImagePosition
@@ -26,17 +28,21 @@ struct OnboardingView: View {
         description: String,
         imageName: String,
         buttonText: String,
+        showBackButton: Bool? = nil,
+        showMenuButton: Bool? = nil,
         onButtonPress: @escaping () -> Void,
         titleColor: Color = .textPrimary,
         accentColor: Color = .brandAccent,
         imagePosition: ImagePosition = .bottom,
         testID: String? = nil
     ) {
-        self.navTitle = navTitle
+        self.navTitle = navTitle ?? ""
         self.title = title
         self.description = description
         self.imageName = imageName
         self.buttonText = buttonText
+        self.showBackButton = showBackButton ?? true
+        self.showMenuButton = showMenuButton ?? true
         self.onButtonPress = onButtonPress
         self.titleColor = titleColor
         self.accentColor = accentColor
@@ -46,7 +52,7 @@ struct OnboardingView: View {
 
     var body: some View {
         VStack(spacing: 0) {
-            NavigationBar(title: navTitle ?? "")
+            NavigationBar(title: navTitle, showBackButton: showBackButton, showMenuButton: showMenuButton)
 
             VStack(spacing: 0) {
                 VStack {

Bitkit/Views/Sheets/AppUpdateSheet.swift

@@ -10,8 +10,6 @@ struct AppUpdateSheet: View {
     @EnvironmentObject private var sheets: SheetViewModel
     let config: AppUpdateSheetItem
 
-    private let appUpdateService = AppUpdateService.shared
-
     var body: some View {
         Sheet(id: .appUpdate, data: config) {
             SheetIntro(