Session item in navigation pane should include session name

### Feature summary

Session name displayed

### What problem are you trying to solve?

If I name my sessions in copilot cli by project and day, when I look at copilot app, which doesn't have session, I'm lost.

### Proposed solution

Ability to display session name if it exists

### Workflow impact

_No response_

### Installation context

_No response_

### Additional context

_No response_