[bug]: Mythic doesn't save launch arguments after quitting

[tux300200]

Describe the bug

Mythic doesn't save launch arguments after you quit it

How to reproduce

1. Open Mythic
2. Set launch arguments for any game (in my case steam)
3. Quit Mythic
4. Open Mythic again
5. See that the launch arguments were deleted

https://discord.com/channels/1154998702650425397/1460654592248512789

Mac & App Information

Mac mini M4 Pro, MacOS 26.2, Mythic 0.6.0, Engine 3.0.0

Logs

https://discord.com/channels/1154998702650425397/1460654592248512789

Before submitting

• I've made research efforts
• I've searched for existing issues