fix(settings): let the profile section use the full width

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/features/settings/UserSettingsView.tsx

@@ -581,7 +581,7 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
           {/* SECTION 1: PROFIL & SICHERHEIT */}
           {/* ================================================================= */}
           {section === 'profile' && (
-            <div className="space-y-5 max-w-2xl">
+            <div className="space-y-5">
               <div className="border-b border-border pb-3">
                 <h2 className="text-sm font-bold text-main">Profil & Anmeldedaten</h2>
                 <p className="text-muted mt-0.5">