Add UIKit navigation title helper

MinimedKit.xcodeproj/project.pbxproj

@@ -265,6 +265,7 @@
 		C1E34B3129C7ABF3009A50A5 /* UseMySentrySelectionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1E34B1929C7ABF3009A50A5 /* UseMySentrySelectionView.swift */; };
 		C1E34B3229C7ABF3009A50A5 /* DataSourceSelectionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1E34B1A29C7ABF3009A50A5 /* DataSourceSelectionView.swift */; };
 		C1E34B3329C7ABF3009A50A5 /* BatteryTypeSelectionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1E34B1B29C7ABF3009A50A5 /* BatteryTypeSelectionView.swift */; };
+		B65C7B5E69AAD31D20C66C6A /* View+UIKitNavigationTitle.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4918419DB490FB27EA2EC8FF /* View+UIKitNavigationTitle.swift */; };
 		C1E34B3429C7ABF3009A50A5 /* ReservoirHUDView.xib in Resources */ = {isa = PBXBuildFile; fileRef = C1E34B1C29C7ABF3009A50A5 /* ReservoirHUDView.xib */; };
 		C1E34B3529C7ABF3009A50A5 /* MinimedPumpSettingsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1E34B1D29C7ABF3009A50A5 /* MinimedPumpSettingsView.swift */; };
 		C1E34B3629C7ABF3009A50A5 /* ReservoirHUDView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1E34B1E29C7ABF3009A50A5 /* ReservoirHUDView.swift */; };
@@ -614,6 +615,7 @@
 		C1E34B1929C7ABF3009A50A5 /* UseMySentrySelectionView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UseMySentrySelectionView.swift; sourceTree = "<group>"; };
 		C1E34B1A29C7ABF3009A50A5 /* DataSourceSelectionView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DataSourceSelectionView.swift; sourceTree = "<group>"; };
 		C1E34B1B29C7ABF3009A50A5 /* BatteryTypeSelectionView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BatteryTypeSelectionView.swift; sourceTree = "<group>"; };
+		4918419DB490FB27EA2EC8FF /* View+UIKitNavigationTitle.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "View+UIKitNavigationTitle.swift"; sourceTree = "<group>"; };
 		C1E34B1C29C7ABF3009A50A5 /* ReservoirHUDView.xib */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.xib; path = ReservoirHUDView.xib; sourceTree = "<group>"; };
 		C1E34B1D29C7ABF3009A50A5 /* MinimedPumpSettingsView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MinimedPumpSettingsView.swift; sourceTree = "<group>"; };
 		C1E34B1E29C7ABF3009A50A5 /* ReservoirHUDView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ReservoirHUDView.swift; sourceTree = "<group>"; };
@@ -1148,6 +1150,7 @@
 				C1E34B1929C7ABF3009A50A5 /* UseMySentrySelectionView.swift */,
 				C1E34B1A29C7ABF3009A50A5 /* DataSourceSelectionView.swift */,
 				C1E34B1B29C7ABF3009A50A5 /* BatteryTypeSelectionView.swift */,
+				4918419DB490FB27EA2EC8FF /* View+UIKitNavigationTitle.swift */,
 				C1E34B1C29C7ABF3009A50A5 /* ReservoirHUDView.xib */,
 				C1E34B1D29C7ABF3009A50A5 /* MinimedPumpSettingsView.swift */,
 				C1E34B1E29C7ABF3009A50A5 /* ReservoirHUDView.swift */,
@@ -1681,6 +1684,7 @@
 				C1E34B2F29C7ABF3009A50A5 /* CommandResponseViewController.swift in Sources */,
 				C1E34B3529C7ABF3009A50A5 /* MinimedPumpSettingsView.swift in Sources */,
 				C1E34B3329C7ABF3009A50A5 /* BatteryTypeSelectionView.swift in Sources */,
+				B65C7B5E69AAD31D20C66C6A /* View+UIKitNavigationTitle.swift in Sources */,
 				C1E34B2929C7ABF3009A50A5 /* MinimedPumpSentrySetupViewController.swift in Sources */,
 				C1E34B9229C7B46C009A50A5 /* TimeZone.swift in Sources */,
 				C1E34B8E29C7B34F009A50A5 /* NibLoadable.swift in Sources */,

MinimedKitUI/Views/BatteryTypeSelectionView.swift

@@ -31,6 +31,6 @@ struct BatteryTypeSelectionView: View {
             }
         }
         .insetGroupedListStyle()
-        .navigationTitle(LocalizedString("Pump Battery Type", comment: "navigation title for pump battery type selection"))
+        .uikitNavigationTitle(LocalizedString("Pump Battery Type", comment: "navigation title for pump battery type selection"))
     }
 }

MinimedKitUI/Views/DataSourceSelectionView.swift

@@ -30,6 +30,6 @@ struct DataSourceSelectionView: View {
             }
         }
         .insetGroupedListStyle()
-        .navigationTitle(LocalizedString("Preferred Data Source", comment: "navigation title for pump battery type selection"))
+        .uikitNavigationTitle(LocalizedString("Preferred Data Source", comment: "navigation title for pump battery type selection"))
     }
 }

MinimedKitUI/Views/MinimedPumpSettingsView.swift

@@ -156,7 +156,8 @@ struct MinimedPumpSettingsView: View {
 
             Section(header: Text(LocalizedString("Configuration", comment: "The title of the configuration section in MinimedPumpManager settings")))
             {
-                NavigationLink(destination: InsulinTypeSetting(initialValue: viewModel.pumpManager.state.insulinType, supportedInsulinTypes: supportedInsulinTypes, allowUnsetInsulinType: false, didChange: viewModel.didChangeInsulinType)) {
+                NavigationLink(destination: InsulinTypeSetting(initialValue: viewModel.pumpManager.state.insulinType, supportedInsulinTypes: supportedInsulinTypes, allowUnsetInsulinType: false, didChange: viewModel.didChangeInsulinType)
+                    .uikitNavigationTitle(LocalizedString("Insulin Type", comment: "Text for confidence reminders navigation link"))) {
                     HStack {
                         Text(LocalizedString("Insulin Type", comment: "Text for confidence reminders navigation link")).foregroundColor(Color.primary)
                         if let currentTitle = viewModel.pumpManager.state.insulinType?.brandName {

MinimedKitUI/Views/UseMySentrySelectionView.swift

@@ -29,6 +29,6 @@ struct UseMySentrySelectionView: View {
             }
         }
         .insetGroupedListStyle()
-        .navigationTitle(LocalizedString("Use MySentry", comment: "navigation title for pump battery type selection"))
+        .uikitNavigationTitle(LocalizedString("Use MySentry", comment: "navigation title for pump battery type selection"))
     }
 }

MinimedKitUI/Views/View+UIKitNavigationTitle.swift

@@ -0,0 +1,91 @@
+//
+//  View+UIKitNavigationTitle.swift
+//  MinimedKitUI
+//
+//  Copyright © 2026 LoopKit Authors. All rights reserved.
+//
+
+import SwiftUI
+import UIKit
+
+extension View {
+    /// Sets the navigation bar title (and large-title display mode) for a SwiftUI screen pushed
+    /// via `NavigationLink` while the flow is hosted inside a UIKit `UINavigationController`
+    /// (as the Medtronic settings screens are, via `MinimedUICoordinator`).
+    func uikitNavigationTitle(
+        _ title: String,
+        displayMode: NavigationBarItem.TitleDisplayMode = .automatic
+    ) -> some View {
+        self
+            .navigationTitle(title)
+            .navigationBarTitleDisplayMode(displayMode)
+            .background(NavigationItemTitleSetter(title: title, largeTitleDisplayMode: displayMode.uiKitLargeTitleDisplayMode))
+    }
+}
+
+private extension NavigationBarItem.TitleDisplayMode {
+    var uiKitLargeTitleDisplayMode: UINavigationItem.LargeTitleDisplayMode {
+        switch self {
+        case .inline: return .never
+        case .large: return .always
+        case .automatic: return .automatic
+        @unknown default: return .automatic
+        }
+    }
+}
+
+/// Sets `navigationItem.title` and `largeTitleDisplayMode` on the enclosing navigation
+/// controller's top view controller. See `View.uikitNavigationTitle(_:displayMode:)`.
+private struct NavigationItemTitleSetter: UIViewControllerRepresentable {
+    let title: String
+    let largeTitleDisplayMode: UINavigationItem.LargeTitleDisplayMode
+
+    func makeUIViewController(context: Context) -> TitleProxyViewController {
+        TitleProxyViewController(title: title, largeTitleDisplayMode: largeTitleDisplayMode)
+    }
+
+    func updateUIViewController(_ uiViewController: TitleProxyViewController, context: Context) {
+        uiViewController.proxyTitle = title
+        uiViewController.largeTitleDisplayMode = largeTitleDisplayMode
+    }
+
+    final class TitleProxyViewController: UIViewController {
+        var proxyTitle: String {
+            didSet { applyTitle() }
+        }
+
+        var largeTitleDisplayMode: UINavigationItem.LargeTitleDisplayMode {
+            didSet { applyTitle() }
+        }
+
+        init(title: String, largeTitleDisplayMode: UINavigationItem.LargeTitleDisplayMode) {
+            self.proxyTitle = title
+            self.largeTitleDisplayMode = largeTitleDisplayMode
+            super.init(nibName: nil, bundle: nil)
+            view.isHidden = true
+        }
+
+        @available(*, unavailable)
+        required init?(coder: NSCoder) {
+            fatalError("init(coder:) has not been implemented")
+        }
+
+        override func viewWillAppear(_ animated: Bool) {
+            super.viewWillAppear(animated)
+            applyTitle()
+        }
+
+        override func viewDidAppear(_ animated: Bool) {
+            super.viewDidAppear(animated)
+            applyTitle()
+        }
+
+        private func applyTitle() {
+            // The pushed SwiftUI screen is the navigation controller's top view controller;
+            // set the title and display mode the navigation bar actually uses.
+            guard let host = navigationController?.topViewController else { return }
+            host.navigationItem.title = proxyTitle
+            host.navigationItem.largeTitleDisplayMode = largeTitleDisplayMode
+        }
+    }
+}