Long invitation links (JWT tokens) broken by quoted-printable encoding in some email clients (SOGo / K-9)

Prerequisites • I have searched the existing Closed _AND_ Open [Issues]( _AND_ [Discussions]( • I have searched and read the [documentation]( Vaultwarden Support String Your environment (Generated via diagnostics page) • Vaultwarden version: v1.36.0 • Web-vault version: v2026.4.1 • OS/Arch: linux/x86_64 • Running within a container: true (Base: Debian) • Database type: SQLite • Database version: 3.51.3 • Uses config.json: true • Uses a reverse proxy: true • IP Header check: true (X-Real-IP) • Internet access: true • Internet access via a proxy: false • DNS Check: true • TZ environment: Europe/Berlin • Browser/Server Time Check: true • Server/NTP Time Check: true • Domain Configuration Check: true • HTTPS Check: true • Websocket Check: true • HTTP Response Checks: true Config & Details (Generated via diagnostics page) <details><summary>Show…