Fix Video Camera auto enabling on Electron (and Tauri) clients using Sable Call.

[Rawrington]

Description

Fixes #285 for good. Element Call (and thus Sable Call) use a callIntent paramter derived from the intent parameter to decide if the Camera should be requested. The Camera was being requested on every call, and thus auto approved on Electron clients (and Tauri clients). This affected both starting a room call and joining a VC room. This is likely due to the fact that in Element they are 'Video Rooms'. This change simply uses JoinExistingDMVoice which sets the correct parameters to join a VC room OR call from the room header. The StartCall and JoinExisting intents function the same on Sable Call's end, this can be changed if they start to diverge in future updates of course though.

I have tested this change in both scenarios of calling with multiple people and it has functioned as intended.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

AI disclosure:

• Partially AI assisted (clarify which code was AI assisted and briefly explain what it does).
• Fully AI generated (explain what all the generated code does in moderate detail).

[henk717]

Works for me on tauri where most solutions fail.
Unrelated to this i'd like to see that change that was discussed on discord in the past where it won't remember the camera state when its not obvious. For example joining from a room list you don't see the current camera button state and can end up joining with a camera enabled without noticing.

[Rawrington]

Works for me on tauri where most solutions fail. Unrelated to this i'd like to see that change that was discussed on discord in the past where it won't remember the camera state when its not obvious. For example joining from a room list you don't see the current camera button state and can end up joining with a camera enabled without noticing.

that would definitely be a seperate solution. Since with this change Sable Call respects the video on/off of the user on joining. It could be worth always forcing video off after leaving a call so it's more inline with discord but I didn't feel that was in scope of a small change like this