Improve add account screen

IceCubesApp/App/Tabs/Settings/AddAccountsView.swift

@@ -44,8 +44,10 @@ struct AddAccountView: View {
         if let instanceFetchError {
           Text(instanceFetchError)
         }
-        if let instance {
+        if instance != nil || !instanceName.isEmpty {
           signInSection
+        }
+        if let instance {
           InstanceInfoSection(instance: instance)
         } else {
           instancesListView
@@ -68,7 +70,10 @@ struct AddAccountView: View {
         isInstanceURLFieldFocused = true
         let client = InstanceSocialClient()
         Task {
-          self.instances = await client.fetchInstances()
+          let instances = await client.fetchInstances()
+          withAnimation {
+            self.instances = instances
+          }
         }
         isSigninIn = false
       }
@@ -76,16 +81,22 @@ struct AddAccountView: View {
         instanceNamePublisher.send(newValue)
       }
       .onReceive(instanceNamePublisher.debounce(for: .milliseconds(500), scheduler: DispatchQueue.main)) { newValue in
+       let newValue = newValue
+          .replacingOccurrences(of: "http://", with: "")
+          .replacingOccurrences(of: "https://", with: "")
         let client = Client(server: newValue)
         Task {
           do {
-            self.instance = try await client.get(endpoint: Instances.instance)
-            self.instanceFetchError = nil
+            let instance: Instance = try await client.get(endpoint: Instances.instance)
+            withAnimation {
+              self.instance = instance
+            }
+            instanceFetchError = nil
           } catch _ as DecodingError {
-            self.instance = nil
-            self.instanceFetchError = "account.add.error.instance-not-supported"
+            instance = nil
+            instanceFetchError = "account.add.error.instance-not-supported"
           } catch {
-            self.instance = nil
+            instance = nil
           }
         }
       }
@@ -102,6 +113,11 @@ struct AddAccountView: View {
           await continueSignIn(url: url)
         }
       })
+      .onChange(of: oauthURL, perform: { newValue in
+        if newValue == nil {
+          isSigninIn = false
+        }
+      })
       .sheet(item: $oauthURL, content: { url in
         SafariView(url: url)
       })
@@ -111,15 +127,18 @@ struct AddAccountView: View {
   private var signInSection: some View {
     Section {
       Button {
-        isSigninIn = true
+        withAnimation {
+          isSigninIn = true
+        }
         Task {
           await signIn()
         }
       } label: {
         HStack {
           Spacer()
-          if isSigninIn {
+          if isSigninIn || !instanceName.isEmpty && instance == nil {
             ProgressView()
+              .id(instanceName)
               .tint(theme.labelColor)
           } else {
             Text("account.add.sign-in")