[FEATURE] Add setting to disable varied thinking status messages (same issue as requested in unresolved, unaddressed #17367, #16865, #9530)

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

Add a configuration option to disable the varied "clever" thinking status messages (like "Schlepping...", "Pondering...", etc.) and replace them with a simple, consistent "Thinking..." message.

A simple "Thinking..." message would:

Reduce visual distraction
Provide a more professional appearance
Be more predictable and less surprising

Proposed Solution

Add a configuration option to disable the varied "clever" thinking status messages (like "Schlepping...", "Pondering...", etc.) and replace them with a simple, consistent "Thinking..." message.

Alternative Solutions

Currently there seems to no way to configure this.

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_