[Feature]: Multi-Device-Profile

Is there an existing issue for this?

• I have searched the existing issues

Platform

all

App version

No response

Feature

Hey, I'm starting a new issue, because #444 led in the wrong direction.

Aim: User A and User B chat with each other on multiple devices. e.g. PC, Smartphone, Tablet

Current Workaround: Create a Group-Chat with all devices in it.

My Idea: Make that a feature!!

1. Add devices to your Profil as "own Devices" - that makes it a Multi-Device-Profile
2. When creating a Chat its automatically a group chat and all your devices will be added to it
3. Chat UI is adjusted so all messages from your devices look like your message (appearing on right side)
4. when opening a chat send a read status to your other devices

Additional:

1. this has the benefit of having a back up on your other devices.
2. security concerns: It will be easy to overlook an unknown device in a chat. Also this device can run some commands like creating a chat, mark messages read .....

Please let me know your thoughts on this.

The issue names no files, tests, or entry points. Start by reviewing the discussion on #5518 and the prior issue #444, then map the proposed device linking, chat creation, message presentation, and read-status behavior across supported clients. Done would require an agreed design that addresses the listed security concerns.