fix: enable Ctrl-C in local runs

[socksy]

Using the same pattern for checking if in MCP mode as we do for remote runs, but on thinking about it I am not 100% sure it's necessary to differentiate any more — I would investigate and change it for both though, here I'm just trying to get the same behaviour as with remote runs.

Used AI to help me research the rust thing of "how do I get access to the ability to cancel the app".

First rabbithole was cloning the application cancellation token, and debugging lifecycle stuff. However, I found it simpler to follow by wrapping the app in an Arc<Mutex<>>, and have both the stream process and the main control loop have references to the same app, and call .terminate() on it directly.

[github-actions]

⚠️ WARNING: This PR targets main instead of develop

This PR is targeting main which will trigger a production deployment when merged.

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Current base: main
Recommended base: develop

[bradhe]

THANK YOU. This was really annoying me.