Trust & Decoration | Show specific decryption error for messages sent by a user in Verification Violation

[BillCarsonFr]

part of https://github.com/element-hq/crypto-internal/issues/308

Alternative (stop gap) for element-hq/element-meta#2523, that is the wanted final behavior where we want to display the decrypted content, alongside a warning that the sender has changed identity.

When OnlySignedDeviceIsolationMode is enabled, messages sent from insecure devices will fail to decrypt.

Currently these messages will be displayed as regular UTD:

We need to show a specific decryption error now.
Web went with this temporary design, see here element-hq/matrix-react-sdk#93

Need a design for the temporary solution where it's in UTD

Updated Design

[andybalaam]

@BillCarsonFr will paste in the Web solution that we will copy here, and link to the final version of this task.

[BillCarsonFr]

@BillCarsonFr will paste in the Web solution that we will copy here, and link to the final version of this task.

Done element-hq/element-meta#2523

[BillCarsonFr]

For reference