Bluetooth, no console output (Web IDE + Screen)

I've just updated the Web IDE to a newer version, so that could be it. Did you try more than once though? You may be able to fix the non-responiveness via screen with: [Ctrl+C] echo(1); [enter] but it doesn't explain console.log not working.

Are you sure it's not that you're using tty. rather than cu.?

Otherwise you could try downloading and manually installing the older version of the Web IDE. Instructions here (the link goes straight to the older version):

https://github.com/espruino/EspruinoWebI­DE/tree/85aaab87b2fe85c310a3916e9873a4d4­effe5975