Simplify login error-handling process

Shared/Account/AccountLoginView.swift

@@ -65,11 +65,10 @@ struct AccountLoginView: View {
                 .padding()
             }
         }
-        .alert(isPresented: $model.account.hasError) {
-            guard let accountError = model.account.currentError else { fatalError() }
-            return Alert(
+        .alert(isPresented: $model.isPresentingLoginErrorAlert) {
+            Alert(
                 title: Text("Error Logging In"),
-                message: Text(accountError.localizedDescription),
+                message: Text(model.loginErrorMessage ?? "An unknown error occurred while trying to login."),
                 dismissButton: .default(Text("OK"))
             )
         }

Shared/Account/AccountModel.swift

@@ -37,12 +37,7 @@ struct AccountModel {
 
     var server: String = ""
     var username: String = ""
-    var hasError: Bool = false
-    var currentError: AccountError? {
-        didSet {
-            hasError = true
-        }
-    }
+
     private(set) var user: WFUser?
     private(set) var isLoggedIn: Bool = false
 

Shared/Models/WriteFreelyModel.swift

@@ -26,11 +26,14 @@ class WriteFreelyModel: ObservableObject {
         }
     }
     @Published var isPresentingDeleteAlert: Bool = false
+    @Published var isPresentingLoginErrorAlert: Bool = false
     @Published var postToDelete: WFAPost?
     #if os(iOS)
     @Published var isPresentingSettingsView: Bool = false
     #endif
 
+    var loginErrorMessage: String?
+
     // swiftlint:disable line_length
     let helpURL = URL(string: "https://discuss.write.as/c/help/5")!
     let licensesURL = URL(string: "https://github.com/writeas/writefreely-swiftui-multiplatform/tree/main/Shared/Resources/Licenses")!
@@ -188,17 +191,25 @@ private extension WriteFreelyModel {
             }
         } catch WFError.notFound {
             DispatchQueue.main.async {
-                self.account.currentError = AccountError.usernameNotFound
+                self.loginErrorMessage = AccountError.usernameNotFound.localizedDescription
+                self.isPresentingLoginErrorAlert = true
             }
         } catch WFError.unauthorized {
             DispatchQueue.main.async {
-                self.account.currentError = AccountError.invalidPassword
+                self.loginErrorMessage = AccountError.invalidPassword.localizedDescription
+                self.isPresentingLoginErrorAlert = true
             }
         } catch {
             if (error as NSError).domain == NSURLErrorDomain,
                (error as NSError).code == -1003 {
                 DispatchQueue.main.async {
-                    self.account.currentError = AccountError.serverNotFound
+                    self.loginErrorMessage = AccountError.serverNotFound.localizedDescription
+                    self.isPresentingLoginErrorAlert = true
+                }
+            } else {
+                DispatchQueue.main.async {
+                    self.loginErrorMessage = error.localizedDescription
+                    self.isPresentingLoginErrorAlert = true
                 }
             }
         }