feat: support Pubky signup

Bitkit/AppScene.swift

@@ -66,7 +66,10 @@ struct AppScene: View {
         PaykitFeatureFlags.enforceBuildAvailability()
         ContactPaymentsService.enableAllPaymentOptions()
 
-        _app = StateObject(wrappedValue: AppViewModel(sheetViewModel: sheetViewModel, navigationViewModel: navigationViewModel))
+        _app = StateObject(wrappedValue: AppViewModel(
+            sheetViewModel: sheetViewModel,
+            navigationViewModel: navigationViewModel
+        ))
         _sheets = StateObject(wrappedValue: sheetViewModel)
         _navigation = StateObject(wrappedValue: navigationViewModel)
         let feeEstimatesManager = FeeEstimatesManager()
@@ -885,6 +888,10 @@ struct AppScene: View {
                             wallet.resetSendState(speed: settings.defaultTransactionSpeed)
                             return
                         }
+                    } catch ScanHandlingError.pubkyAuthRequest {
+                        guard paykitPaymentRequestManager.isCurrentPresentation(request) else { return }
+                        _ = paykitPaymentRequestManager.markPresentedIfPending(request)
+                        continue
                     } catch is CancellationError {
                         if app.ownsContactPaymentContext(contactPaymentContext) {
                             app.resetSendState()

Bitkit/MainNavView.swift

@@ -1,5 +1,35 @@
 import SwiftUI
 
+enum PendingProfileSetupResumeState {
+    case inactive
+    case waiting
+    case ready
+
+    func shouldResume(didResume: inout Bool) -> Bool {
+        if self == .inactive {
+            didResume = false
+        }
+        guard self == .ready, !didResume else { return false }
+        didResume = true
+        return true
+    }
+}
+
+func resolvePendingProfileSetupResumeState(
+    isProfileSetupPending: Bool,
+    isPaykitUIActive: Bool,
+    isAuthenticated: Bool,
+    hasActiveSheet: Bool,
+    isReplacingSheet: Bool,
+    currentRoute: Route?
+) -> PendingProfileSetupResumeState {
+    guard isProfileSetupPending else { return .inactive }
+    guard isPaykitUIActive, isAuthenticated, !hasActiveSheet, !isReplacingSheet, currentRoute != .createProfile else {
+        return .waiting
+    }
+    return .ready
+}
+
 struct MainNavView: View {
     @AppStorage(PaykitFeatureFlags.uiEnabledKey) private var isPaykitUIEnabled = false
 
@@ -20,11 +50,23 @@ struct MainNavView: View {
 
     @State private var showClipboardAlert = false
     @State private var clipboardUri: String?
+    @State private var didResumePendingPubkyProfileSetup = false
 
     private var isPaykitUIActive: Bool {
         PaykitFeatureFlags.isUIAvailable && isPaykitUIEnabled
     }
 
+    private var pendingProfileSetupResumeState: PendingProfileSetupResumeState {
+        resolvePendingProfileSetupResumeState(
+            isProfileSetupPending: pubkyProfile.isProfileSetupPending,
+            isPaykitUIActive: isPaykitUIActive,
+            isAuthenticated: pubkyProfile.isAuthenticated,
+            hasActiveSheet: sheets.activeSheetConfiguration != nil,
+            isReplacingSheet: sheets.isReplacingSheet,
+            currentRoute: navigation.currentRoute
+        )
+    }
+
     // Delay constants for clipboard processing
     private static let nodeReadyDelayNanoseconds: UInt64 = 500_000_000 // 0.5 seconds
     private static let statePropagationDelayNanoseconds: UInt64 = 500_000_000 // 0.5 seconds
@@ -39,6 +81,10 @@ struct MainNavView: View {
                 navigation.navigate(.spendingHwSigned)
             }
         }
+        .onChange(of: pendingProfileSetupResumeState, initial: true) { _, resumeState in
+            guard resumeState.shouldResume(didResume: &didResumePendingPubkyProfileSetup) else { return }
+            navigation.navigate(.createProfile)
+        }
         .sheet(
             item: $sheets.addTagSheetItem,
             onDismiss: {