Permissions stuck in auto mode after changing back to interactive

### Describe the bug

When changing permissions from auto mode back to interactive, the agent keeps making code changes without permission requests as it does normally in "interactive mode". I have observed this behavior for multiple models.

### Affected version

1.0.78

### Steps to reproduce the behavior

go from auto mode where it implements something, back to interactive and do more code changes then

### Expected behavior

_No response_

### Additional context

_No response_

Start by reproducing the permission-mode transition in Copilot CLI 1.0.78: perform a change in auto mode, switch back to interactive mode, and request another code change. Trace the mode transition and verify that interactive mode resumes permission requests after the switch.

Written by the indexing model from the issue text.