[FEATURE] Add real-time/streaming output for long-running commands so users can see compilation progress, not just final results

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I often do long running compiles and other operations which it would be nice to see the output from so that I know if everything is proceeding correctly. In Gemini CLI this is put into a "window" inside the cli which is useful, but the implementation isn't explained to the user and can be confusing. Maybe asking the user if they would like an output display in window would work?

Proposed Solution

Have the option to display console output from long running processes in a sub window of Claude CLI.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

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Additional Context

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