[Bug]: Reverting loses context

### Platform

macOS

### Operating system version

Tahoe 26.3.1 (a)

### System architecture

ARM64 (M1, M2, etc)

### PolyScope Version

0.19.0

### Bug description

When using the "Revert to here" feature, it seems that the context gets lost.

### Steps to reproduce

Ask it something:

Then revert and re-ask it the same thing:

### Relevant log output

```shell

```