bug: Cannot type 'exit' command in AI (F5) tab - tries to search as text instead

[brainJamStark]

Description

When in the AI tab (F5), typing "exit" does not execute the exit command but instead tries to search it as text.

Steps to Reproduce

• Launch cqlai
• Press F5 to switch to AI tab
• Type "exit" and press Enter
• Observe that it searches for "exit" as text instead of executing the exit command

Expected Behavior

Typing "exit" in the AI tab should exit the application (same as other tabs)

Actual Behavior

"exit" is treated as search text instead of a command

Environment

• cqlai version: current
• Affected view: AI tab (F5)

[hshimizu]

the ai prompt is a free text area with no special commands.

I think we may not implement the special word "exit" for now.