diff --git a/apps/rebreak-native/app/(app)/index.tsx b/apps/rebreak-native/app/(app)/index.tsx
index 712dd3b..d39d9e7 100644
--- a/apps/rebreak-native/app/(app)/index.tsx
+++ b/apps/rebreak-native/app/(app)/index.tsx
@@ -80,7 +80,7 @@ export default function HomeScreen() {
   );
 
   return (
-    <View style={{ flex: 1, backgroundColor: colors.bg }}>
+    <View style={{ flex: 1, backgroundColor: colors.groupedBg }}>
       <AppHeader />
 
       <FlatList
diff --git a/apps/rebreak-native/components/mail/MailAccountSettingsSheet.tsx b/apps/rebreak-native/components/mail/MailAccountSettingsSheet.tsx
index 84025b1..25a8641 100644
--- a/apps/rebreak-native/components/mail/MailAccountSettingsSheet.tsx
+++ b/apps/rebreak-native/components/mail/MailAccountSettingsSheet.tsx
@@ -257,8 +257,12 @@ export function MailAccountSettingsSheet({
   async function handleSaveTitle() {
     const ok = await saveTitle(account.id, titleDraft);
     if (ok) {
-      onTitleSaved(titleDraft.trim() || null);
-      setMode('list');
+      const newTitle = titleDraft.trim() || null;
+      // Sheet ZUERST dismissen, dann nach Animation-Complete Parent informieren.
+      // Sonst rendern Sheet (closing) + SuccessAlert (opening) gleichzeitig → iOS
+      // wirft „already presenting"-Crash + Page-Freeze. ~350ms = FormSheet-Dismiss.
+      handleClose();
+      setTimeout(() => onTitleSaved(newTitle), 350);
     }
   }
 
@@ -266,10 +270,10 @@ export function MailAccountSettingsSheet({
     setLocalError(null);
     const result = await connect({ email: account.email, password: passwordDraft });
     if (result.ok) {
-      setPasswordDraft('');
-      setPasswordVisible(false);
-      onPasswordSaved();
-      setMode('list');
+      // Symmetrisch zu handleSaveTitle: Sheet zuerst dismissen, dann nach
+      // Animation-Complete Parent informieren — sonst Modal-Conflict-Crash.
+      handleClose();
+      setTimeout(() => onPasswordSaved(), 350);
     } else {
       setLocalError(result.error ?? t('mail.connect_failed'));
     }
diff --git a/apps/rebreak-native/stores/auth.ts b/apps/rebreak-native/stores/auth.ts
index 74d5515..5f52047 100644
--- a/apps/rebreak-native/stores/auth.ts
+++ b/apps/rebreak-native/stores/auth.ts
@@ -73,6 +73,14 @@ export const useAuthStore = create<AuthState>((set) => ({
 
   signOut: async () => {
     await supabase.auth.signOut();
+    // Google-OAuth-Cookie in SafariViewController/Chrome Custom Tabs leeren,
+    // sonst springt der nächste Sign-in stillschweigend auf den vorigen Account
+    // statt den Account-Picker zu zeigen.
+    try {
+      await WebBrowser.coolDownAsync();
+    } catch {
+      // ignore
+    }
     set({ session: null, user: null });
   },
 
@@ -91,6 +99,9 @@ export const useAuthStore = create<AuthState>((set) => ({
       options: {
         redirectTo: redirectUri,
         skipBrowserRedirect: true,
+        // Google: prompt=select_account erzwingt den Account-Picker,
+        // auch wenn der Browser noch eine aktive Google-Session hat.
+        ...(provider === 'google' ? { queryParams: { prompt: 'select_account' } } : {}),
       },
     });