Importing or downloading a PGP public key attachment from a PGP encrypted message doesn't work

[mindsolve]

Describe the bug
When trying to open or download a PGP public key (with .asc ending) from within a decrypted PGP message, nothing happens in the UI (it silently fails to download or open).
In the browser console, a Content-Security-Policy error is logged regarding accessing a "data:application/pgp-keys;[...]" URL (see below).

To Reproduce
Steps to reproduce the behavior:

1. Receive a PGP-encrypted e-mail, with a public PGP key as attachment
2. Open and decrypt the message
3. Click on the attachment
4. Observe nothing in the UI to happen

Expected behavior
I would expect either the "Import PGP key" dialog to open (as it does with a non-encrypted message with a .asc/PGP public key attached), or otherwise to simply download the file.

Screenshots
I don't think a screenshot would add any information here

Please complete the following information:

• Browser: Firefox 123.0.1
• IMAP daemon: dovecot
• PHP version: 8.1.2-1ubuntu2.14
• SnappyMail Version: 2.35.3
• Mode: standalone

Debug/logging information
Snappymail Debug Log (only lines were written during opening the message, none were written during decryption or attempted attachment download)
snappymail-debug-pgp-attachment-download.log

Browser Console Log:
(note: translation for the german first log line is: Content-Security-Policy: The page settings have blocked the loading of a resource on data:application/pgp-keys;base64,LS0tLS1... )

Content-Security-Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf data:application/pgp-keys;base64,LS0tLS1… blockiert ("connect-src"). snappy.felix-ern.de:13:121114

Uncaught (in promise) TypeError: NetworkError when attempting to fetch resource.
    fetch https://snappy.felix-ern.de/#/mailbox/INBOX:13
    Vr https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    onBuild https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    onBuild https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    Ss https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    ks https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    ks https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    parse https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/libs.min.js:1
    l https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/libs.min.js:1
    l https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/libs.min.js:1
    init https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/libs.min.js:1
    Ms https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    start https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    Gi https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    promise callback*Gi https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    start https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    bootstart https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    bootstart https://snappy.felix-ern.de/snappymail/v/2.35.3/static/js/min/app.min.js:1
    c https://snappy.felix-ern.de/#/mailbox/INBOX:13
    <anonymous> https://snappy.felix-ern.de/#/mailbox/INBOX:13
    promise callback* https://snappy.felix-ern.de/#/mailbox/INBOX:13
    promise callback* https://snappy.felix-ern.de/#/mailbox/INBOX:13
    <anonymous> https://snappy.felix-ern.de/#/mailbox/INBOX:13
snappy.felix-ern.de:13:121114

Additional context
Add any other context about the problem here.

[the-djmaze]

It's not only PGP decrypted messages.
It failed for any message that is parsed in JavaScript.

[mindsolve]

Thanks a lot! It now works exactly as expected 👍