To integrate Roundcube better into Nextcloud, I published this plugin:
https://github.com/andreas-p/roundcube-nextcloud-embed
It also catches session errors, preventing embedded redirects to Roundcube login on timeouts. This was actually the primary reason to start the plugin.
Additionally, color styling is overwritten from Nextcloud styles.
To integrate Roundcube better into Nextcloud, I published this plugin:
https://github.com/andreas-p/roundcube-nextcloud-embed
It also catches session errors, preventing embedded redirects to Roundcube login on timeouts. This was actually the primary reason to start the plugin.
Additionally, color styling is overwritten from Nextcloud styles.