hermes - 💡(How to fix) Fix TUI slash completion: /model disappears after space+backspace

Bug Description

TUI slash command selector/filtering can desync after overtype + backspace, causing expected command entries to disappear from suggestions.

/model is one visible example, but this is not limited to /model.

Steps to Reproduce

1. Launch TUI (hermes --tui)
2. Type / and begin a command (example: /foo)
3. Overtype (e.g., add a space or extra characters)
4. Backspace to the previous command token
5. Observe slash suggestions

Expected Behavior

When backspacing to a valid command token, matching slash commands should remain visible in the selector.

Actual Behavior

Filtering/suggestions can fail to show expected matches after overtype/backspace transitions.

Scope

• Affects slash selector/filter UX broadly
• Not specific to one command

Environment

• OS: Windows 10 (git-bash shell backend)
• Repo: NousResearch/hermes-agent
• Area: TUI slash completion/filter path

Note

A prior local experimental patch was reverted and is not part of this report.