This PR hardcodes the font size for the OS notification and adjusts the
copywriting on the `DoneStreaming` scenario.
1. Reason for the former change is because notifications always have a
fixed width and height, so any responsive design strategy here wouldn't
fully work.
2. Reason for the latter is because when the assistant response is done
streaming, that _can_ mean "changes have been applied" (previous label)
but it can also not mean that. So, I'm making it more generic now.
Release Notes:
- N/A
Danilo Leal
df6ee1fc4a