Ban Yaro Go — Phase 1 Foundation

SwiftUI/SwiftData iOS-Client, redet mit https://banyaro.app FastAPI-Backend.
Bundle-ID app.banyaro.ios, Xcode-26-Projekt mit synchronisierten Ordnern.

Drin:
- APIClient (URLSession + Bearer + convertFromSnakeCase Decoder)
- KeychainStore + AuthSession (@Observable) für persistenten Login
- LoginView, MainTabView, SettingsView (mit Logout)
- RoutesListView + RouteDetailView mit MapKit-Polyline aus preview_track
- DogsListView mit Foto-Avatar
- App-Icon (Pfote auf Banyaro-Amber)

BanYaroGo/Views/LoginView.swift

@@ -0,0 +1,78 @@
+import SwiftUI
+
+struct LoginView: View {
+    @Environment(AuthSession.self) private var auth
+
+    @State private var email = ""
+    @State private var password = ""
+
+    var body: some View {
+        VStack(spacing: 24) {
+            Spacer()
+
+            Image(systemName: "pawprint.fill")
+                .font(.system(size: 80))
+                .foregroundStyle(Color.accentColor)
+
+            VStack(spacing: 6) {
+                Text("Ban Yaro Go")
+                    .font(.largeTitle.bold())
+                Text("Melde dich mit deinem banyaro-Account an.")
+                    .font(.callout)
+                    .foregroundStyle(.secondary)
+                    .multilineTextAlignment(.center)
+            }
+
+            VStack(spacing: 12) {
+                TextField("E-Mail", text: $email)
+                    .textContentType(.emailAddress)
+                    .keyboardType(.emailAddress)
+                    .textInputAutocapitalization(.never)
+                    .autocorrectionDisabled()
+                    .padding()
+                    .background(.background.secondary, in: RoundedRectangle(cornerRadius: 12))
+
+                SecureField("Passwort", text: $password)
+                    .textContentType(.password)
+                    .padding()
+                    .background(.background.secondary, in: RoundedRectangle(cornerRadius: 12))
+            }
+
+            if let error = auth.errorMessage {
+                Text(error)
+                    .font(.footnote)
+                    .foregroundStyle(.red)
+                    .multilineTextAlignment(.center)
+            }
+
+            Button {
+                Task {
+                    await auth.login(
+                        email: email.trimmingCharacters(in: .whitespacesAndNewlines),
+                        password: password
+                    )
+                }
+            } label: {
+                Group {
+                    if auth.isLoggingIn {
+                        ProgressView().tint(.white)
+                    } else {
+                        Text("Login").bold()
+                    }
+                }
+                .frame(maxWidth: .infinity, minHeight: 50)
+            }
+            .background(Color.accentColor, in: RoundedRectangle(cornerRadius: 12))
+            .foregroundStyle(.white)
+            .disabled(auth.isLoggingIn || email.isEmpty || password.isEmpty)
+
+            Spacer()
+        }
+        .padding(.horizontal, 28)
+    }
+}
+
+#Preview {
+    LoginView()
+        .environment(AuthSession())
+}