fix(ui): re-enable swipe-to-back gesture

Bitkit/Extensions/UINavigationController+SwipeBack.swift

@@ -0,0 +1,25 @@
+import UIKit
+
+/// Shared state for swipe-back gesture. Views can set this via the `.allowSwipeBack(_:)` modifier
+/// to disable the gesture on screens that don't show a back button (e.g. SheetHeader without back).
+enum SwipeBackState {
+    /// When false, the interactive pop gesture is disabled. Set by views that hide the back button.
+    static var allowSwipeBack: Bool = true
+}
+
+/// Re-enables the interactive swipe-back gesture when the navigation bar is hidden
+/// (e.g. when using a custom NavigationBar with `.navigationBarHidden(true)`).
+/// Without this, the system disables the gesture when the bar is hidden.
+/// Use `.allowSwipeBack(false)` on views that don't show a back button to disable the gesture there.
+extension UINavigationController: @retroactive UIGestureRecognizerDelegate {
+    override open func viewDidLoad() {
+        super.viewDidLoad()
+        interactivePopGestureRecognizer?.delegate = self
+    }
+
+    public func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
+        // Only allow swipe-back when not at root — avoids iOS 17+ freeze when re-pushing after swiping to root
+        guard viewControllers.count > 1 else { return false }
+        return SwipeBackState.allowSwipeBack
+    }
+}

Bitkit/Extensions/View+AllowSwipeBack.swift

@@ -0,0 +1,21 @@
+import SwiftUI
+
+extension View {
+    /// Controls whether the interactive swipe-back gesture is enabled on this screen.
+    /// Use `.allowSwipeBack(false)` on screens that use a custom header without a back button
+    /// (e.g. `SheetHeader` with default `showBackButton: false`) so users can't swipe to dismiss.
+    /// Default is `true`; only apply this modifier when you want to disable the gesture.
+    func allowSwipeBack(_ allowed: Bool) -> some View {
+        modifier(AllowSwipeBackModifier(allowed: allowed))
+    }
+}
+
+private struct AllowSwipeBackModifier: ViewModifier {
+    let allowed: Bool
+
+    func body(content: Content) -> some View {
+        content
+            .onAppear { SwipeBackState.allowSwipeBack = allowed }
+            .onDisappear { SwipeBackState.allowSwipeBack = true }
+    }
+}

Bitkit/Views/Backup/BackupMnemonic.swift

@@ -99,6 +99,7 @@ struct BackupMnemonicView: View {
             .padding(.horizontal, 16)
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
         .frame(maxWidth: .infinity, maxHeight: .infinity)

Bitkit/Views/Backup/BackupPassphrase.swift

@@ -7,7 +7,7 @@ struct BackupPassphrase: View {
 
     var body: some View {
         VStack(alignment: .leading, spacing: 0) {
-            SheetHeader(title: t("security__pass_your"))
+            SheetHeader(title: t("security__pass_your"), showBackButton: true)
 
             VStack(spacing: 0) {
                 BodyMText(t("security__pass_text"))

Bitkit/Views/Gift/GiftError.swift

@@ -30,6 +30,7 @@ struct GiftFailed: View {
             }
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
         .accessibilityIdentifier("GiftError")

Bitkit/Views/Gift/GiftUsed.swift

@@ -30,6 +30,7 @@ struct GiftUsed: View {
             }
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
         .accessibilityIdentifier("GiftUsed")

Bitkit/Views/Gift/GiftUsedUp.swift

@@ -30,6 +30,7 @@ struct GiftUsedUp: View {
             }
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
         .accessibilityIdentifier("GiftUsedUp")

Bitkit/Views/Settings/Security/SecuritySheet/SecurityBiometrics.swift

@@ -60,6 +60,7 @@ struct SecurityBiometrics: View {
             .padding(.horizontal, 16)
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
         .alert(

Bitkit/Views/Settings/Security/SecuritySheet/SecurityPin.swift

@@ -52,6 +52,7 @@ struct SecurityPin: View {
             }
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .sheetBackground()
     }
 

Bitkit/Views/Settings/Security/SecuritySheet/SecuritySuccess.swift

@@ -60,6 +60,7 @@ struct SecuritySuccess: View {
             .padding(.horizontal, 16)
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
     }

Bitkit/Views/Transfer/FundManualSuccessView.swift

@@ -47,7 +47,7 @@ struct FundManualSuccessView: View {
             .accessibilityIdentifier("ExternalSuccess")
         }
         .navigationBarHidden(true)
-        .interactiveDismissDisabled()
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
     }
 }

Bitkit/Views/Transfer/SavingsProgressView.swift

@@ -42,7 +42,7 @@ struct SavingsProgressContentView: View {
 
     var body: some View {
         VStack(alignment: .leading, spacing: 0) {
-            NavigationBar(title: navTitle)
+            NavigationBar(title: navTitle, showBackButton: false)
                 .padding(.bottom, 16)
 
             DisplayText(title, accentColor: .brandAccent)
@@ -113,9 +113,9 @@ struct SavingsProgressContentView: View {
             .accessibilityIdentifierIfPresent(progressState == .success ? "TransferSuccess-button" : nil)
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .bottomSafeAreaPadding()
-        .interactiveDismissDisabled()
     }
 }
 

Bitkit/Views/Transfer/SettingUpView.swift

@@ -194,9 +194,9 @@ struct SettingUpView: View {
             }
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .bottomSafeAreaPadding()
-        .interactiveDismissDisabled()
         .onAppear {
             Logger.debug("View appeared - TransferViewModel is handling order updates")
 

Bitkit/Views/Wallets/Send/SendFailure.swift

@@ -31,6 +31,7 @@ struct SendFailure: View {
                 .padding(.horizontal, 16)
             }
             .navigationBarHidden(true)
+            .allowSwipeBack(false)
             .sheetBackground()
         }
     }

Bitkit/Views/Wallets/Send/SendPendingScreen.swift

@@ -70,6 +70,7 @@ struct SendPendingScreen: View {
             }
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
         .frame(maxWidth: .infinity, maxHeight: .infinity)

Bitkit/Views/Wallets/Send/SendQuickpay.swift

@@ -72,6 +72,7 @@ struct SendQuickpay: View {
             DisplayText(t("wallet__send_quickpay__title"), accentColor: .purpleAccent)
         }
         .navigationBarHidden(true)
+        .allowSwipeBack(false)
         .padding(.horizontal, 16)
         .sheetBackground()
         .frame(maxWidth: .infinity, maxHeight: .infinity)

Bitkit/Views/Wallets/Send/SendSuccess.swift

@@ -77,6 +77,7 @@ struct SendSuccess: View {
                 .padding(.horizontal, 16)
             }
             .navigationBarHidden(true)
+            .allowSwipeBack(false)
             .sheetBackground()
         }
         .task {