replace mock passport flows with live server integration

Switch the app to the real passport enrollment, dashboard, device, alert, and challenge APIs so it can pair with idp.global and act on server-backed state instead of demo data.

swift/Sources/Features/Home/HomePanels.swift

@@ -231,27 +231,31 @@ struct NotificationCenterView: View {
 
 struct DevicesView: View {
     @ObservedObject var model: AppViewModel
-    @State private var isPairingCodePresented = false
 
     private var devices: [DevicePresentation] {
         guard let session else { return [] }
 
-        let current = DevicePresentation(
-            name: session.deviceName,
-            systemImage: symbolName(for: session.deviceName),
-            lastSeen: .now,
-            isCurrent: true,
-            isTrusted: true
-        )
+        if !model.devices.isEmpty {
+            return model.devices.map { device in
+                DevicePresentation(
+                    name: device.label,
+                    systemImage: symbolName(for: device.label),
+                    lastSeen: device.lastSeenAt ?? session.pairedAt,
+                    isCurrent: device.isCurrent,
+                    isTrusted: true
+                )
+            }
+        }
 
-        let others = [
-            DevicePresentation(name: "Phil's iPad Pro", systemImage: "ipad", lastSeen: .now.addingTimeInterval(-60 * 18), isCurrent: false, isTrusted: true),
-            DevicePresentation(name: "Berlin MacBook Pro", systemImage: "laptopcomputer", lastSeen: .now.addingTimeInterval(-60 * 74), isCurrent: false, isTrusted: true),
-            DevicePresentation(name: "Apple Watch", systemImage: "applewatch", lastSeen: .now.addingTimeInterval(-60 * 180), isCurrent: false, isTrusted: false)
+        return [
+            DevicePresentation(
+                name: session.deviceName,
+                systemImage: symbolName(for: session.deviceName),
+                lastSeen: .now,
+                isCurrent: true,
+                isTrusted: true
+            )
         ]
-
-        let count = max((model.profile?.deviceCount ?? 1) - 1, 0)
-        return [current] + Array(others.prefix(count))
     }
 
     private var session: AuthSession? {
@@ -274,10 +278,9 @@ struct DevicesView: View {
 
             Section {
                 VStack(spacing: 12) {
-                    Button("Pair another device") {
-                        isPairingCodePresented = true
-                    }
-                    .buttonStyle(PrimaryActionStyle())
+                    Text("Start new device pairing from your idp.global web session, then scan the fresh pairing QR in this app.")
+                        .font(.footnote)
+                        .foregroundStyle(.secondary)
 
                     Button("Sign out everywhere") {
                         model.signOut()
@@ -288,11 +291,6 @@ struct DevicesView: View {
             }
         }
         .navigationTitle("Devices")
-        .sheet(isPresented: $isPairingCodePresented) {
-            if let session {
-                OneTimePasscodeSheet(session: session)
-            }
-        }
     }
 
     private func symbolName(for deviceName: String) -> String {