Show both sign-ins on the first screen and find servers automatically

mac/Sources/Byre/Startup.swift

@@ -265,7 +265,6 @@ final class ConnectForm {
     var problem: String?
     var missing: [Check] = []
     var connecting = false
-    var serviceLogin: TailnetInfo?
 
     func connect() async -> URL? {
         guard let origin = parseOrigin(serverText) else {
@@ -303,7 +302,6 @@ final class ConnectForm {
             try await waitForServer(origin)
         } catch {
             connecting = false
-            serviceLogin = nil
             problem = errorText(error)
             return nil
         }
@@ -315,13 +313,11 @@ final class ConnectForm {
         while true {
             let info = try? await Server.tailnet(loopback)
             if let info, info.state == "Running" {
-                serviceLogin = nil
                 guard let origin = URL(string: info.origin), !info.origin.isEmpty else {
                     throw ProcessFailure(errorDescription: noCertificates)
                 }
                 return origin
             }
-            serviceLogin = info
             if info == nil, Date().timeIntervalSince(started) > 10 {
                 throw ProcessFailure(errorDescription: "byre was installed but \(loopback.absoluteString) didn't answer within 10 s.")
             }
@@ -408,9 +404,6 @@ struct ConnectView: View {
                 Button("Run byre on this Mac", action: installHere)
             }
             .disabled(form.connecting)
-            if let login = form.serviceLogin {
-                ServiceLoginView(info: login)
-            }
             if let problem = form.problem {
                 Text(problem)
                     .foregroundStyle(Palette.danger)
@@ -484,7 +477,7 @@ struct ServerWindow: View {
 
     @ViewBuilder
     private var content: some View {
-        if !Tailnet.shared.running {
+        if !Tailnet.shared.signedIn {
             TailnetLoginView()
         } else if let connection {
             switch connection.phase {