Terminal commands fail when `$SHELL` is set to `tcsh` due to hardcoded `-l` shell flag

[MayurKishorKumar]

Before submitting your bug report

• I've tried using the "Ask AI" feature on the Continue docs site to see if the docs have an answer
• I'm not able to find a related conversation on GitHub discussions that reports the same bug
• I'm not able to find an open issue that reports the same bug
• I've seen the troubleshooting guide on the Continue Docs

Relevant environment info

- OS: Linux
- Continue version: 1.2.22
- IDE version: VSCode 1.105.1
- Model: Azure OpenAI

Description

When Continue runs a terminal command, it hardcodes the -l (login shell) flag for all Unix shells.
However, tcsh and csh do not support -l as a flag, causing every terminal command to fail immediately.

To reproduce

1. Have $SHELL set to /bin/tcsh
2. Open VS Code with Continue installed
3. Ask Continue to run any basic command e.g. pwd, ls -a, echo hello

Log output

Unknown option: `-l' 
Usage: tcsh [ -bcdefilmnqstvVxX ] [ argument ... ]. 
Command failed with exit code 1