v0.1.0 — initialer Sprint, vollständige Auth-Reise als SwiftUI

Phase 2 aus dem Native-Auth-Vollausbau-Plan (Option A, siehe
../mana/docs/MANA_SWIFT.md). Entstanden weil drei Apps fast-
byte-identische LoginView.swift hatten und Sign-Up/Forgot-PW
komplett fehlten.

ManaAuthUI-Library mit:
- ManaBrandConfig — App-injizierte Theme-Werte (forest für Cards/
  Manaspur, mana-default für Memoro), Environment-Key, View-Modifier
- Base-Components: ManaAuthScaffold, ManaPrimaryButton, ManaTextField,
  ManaSecureField + .manaEmailField()-Modifier
- ManaLoginView + LoginViewModel — Email/PW-Login, schaltet bei
  AuthError.emailNotVerified automatisch auf ManaEmailVerifyGateView
- ManaSignUpView + SignUpViewModel — Email/Name/PW + awaiting-
  Verification-Hinweis-Screen
- ManaEmailVerifyGateView + ViewModel — Resend-Verification
- ManaForgotPasswordView + ViewModel — Reset-Mail anfordern (immer
  generischer Hinweis, User-Enumeration-Schutz)
- ManaResetPasswordView + ViewModel — neues PW mit Token aus
  Universal-Link
- ManaChangeEmailView, ManaChangePasswordView, ManaDeleteAccountView
  + internal ViewModels — Account-Bausteine
- ManaDeleteAccountView ist zweistufig (Bestätigungs-Wort tippen
  + Passwort) → App-Store-Guideline 5.1.1(v) Pflicht-Surface

26/26 ViewModel-Tests grün via per-test-ID URLProtocol-Routing
(löst Parallel-Pollution zwischen .serialized Suites).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Sources/ManaAuthUI/Components/ManaAuthScaffold.swift

@@ -0,0 +1,67 @@
+import SwiftUI
+
+/// Gemeinsames Layout-Gerüst für alle Auth-Screens: brand-getöntes
+/// Background, scrollbarer Content-Stack mit max-width, optional
+/// ein zentriertes Logo + App-Name + Tagline-Block am Anfang.
+///
+/// Apps brauchen keine eigene NavigationStack-Wrapper — das ist die
+/// Aufgabe der konsumierenden View (Login/SignUp etc. sitzen ggf.
+/// in einer Sheet oder einem NavigationStack der App).
+public struct ManaAuthScaffold<Content: View>: View {
+    @Environment(\.manaBrand) private var brand
+    private let showsHeader: Bool
+    private let content: Content
+
+    /// - Parameters:
+    ///   - showsHeader: Wenn `true`, wird oben Logo + AppName + Tagline
+    ///     gerendert. Default `true`. Auf Account-Sub-Views (Change-
+    ///     Password etc.) sinnvollerweise `false`.
+    public init(showsHeader: Bool = true, @ViewBuilder content: () -> Content) {
+        self.showsHeader = showsHeader
+        self.content = content()
+    }
+
+    public var body: some View {
+        ZStack {
+            brand.background.ignoresSafeArea()
+
+            ScrollView {
+                VStack(spacing: 24) {
+                    if showsHeader {
+                        header
+                    }
+                    content
+                }
+                .padding(.horizontal, 24)
+                .padding(.top, showsHeader ? 64 : 24)
+                .padding(.bottom, 32)
+                .frame(maxWidth: 480)
+                .frame(maxWidth: .infinity)
+            }
+            #if os(iOS)
+            .scrollDismissesKeyboard(.interactively)
+            #endif
+        }
+    }
+
+    @ViewBuilder
+    private var header: some View {
+        VStack(spacing: 12) {
+            if let symbol = brand.logoSymbol {
+                Image(systemName: symbol)
+                    .font(.system(size: 44, weight: .medium))
+                    .foregroundStyle(brand.primary)
+            }
+            Text(brand.appName)
+                .font(.system(size: 40, weight: .bold))
+                .foregroundStyle(brand.primary)
+                .multilineTextAlignment(.center)
+            if let tagline = brand.tagline {
+                Text(tagline)
+                    .font(.subheadline)
+                    .foregroundStyle(brand.mutedForeground)
+                    .multilineTextAlignment(.center)
+            }
+        }
+    }
+}