[Bug]: CLAUDE.md not updated on init

The init suggests it's going to paste the AGENT_GUIDELINES into CLAUDE.md during init

I ran: 

```
mkdir foo; cd foo; touch CLAUDE.md; git init; git add .; git commit -m 'lol'; backlog init example
```

Then selected CLAUDE.md interactively and hit enter and init exited status code 0.

```
cat CLAUDE.md
```

Yielded an empty file. 

Had to dig through the repo to extract agent guidelines manually