[FEATURE] Allow simple commands like /theme to execute while agent is running

Description

When an agent is actively running a task, executing simple commands like /theme does not provide a good response. Users currently need to wait for the agent to finish before they can successfully change settings like themes.

Expected Behavior

Simple, non-interfering commands (like theme selection) should be able to execute immediately without waiting for agent completion, since they:

• Don't require agent intelligence or planning
• Are straightforward configuration changes
• Don't interfere with the running task

Current Behavior

While an agent is running, executing /theme either:

• Doesn't respond properly
• Requires waiting for the agent to complete before the theme selection works

Suggested Solution

Consider implementing a command priority system where:

• Simple configuration commands (/theme, /help, etc.) can execute immediately
• Complex commands that require agent reasoning can be queued or wait for completion
• Users get clear feedback about which category a command falls into

Impact

This would improve user experience by allowing quick configuration changes without interrupting workflow or waiting for potentially long-running agent tasks to complete.

Related

This relates to the existing feature request about queued message sending (#existing-issue-if-found), but focuses specifically on the subset of commands that should bypass the queue entirely.