Bugreport doesn't provide context of the subagent

[rkj]

What happened?

As part of #21761 I gathered the /bug report, but it doesn't really contain any info of what was going inside the subagent, just the main session.

What did you expect to happen?

Subagent context to be also included inside somewhere.

Client information

Client Information

Run gemini to enter the interactive CLI, then run the /about command.

> /about
│ CLI Version                                                0.34.0-nightly.20260304.28af4e127-git.337e4bc                                                                 │
│ Git Commit                                                 337e4bc                                                                                                       │
│ Model                                                      gemini-3-flash-preview                                                                                        │
│ Sandbox                                                    no sandbox                                                                                                    │
│ OS                                                         linux                                                                                                         │```

</details>

### Login information

_No response_

### Anything else we need to know?

_No response_

[gemini-cli]

Bug report missing subagent context. The CLI version 0.34.0 is older than 6 versions, so the status/need-retesting label is added.