Allow hiding/customizing the "Thinking" label during extended thinking

Feature request

The spinnerVerbs setting allows customizing (or removing) the verb labels shown during tool execution, which is great. However, the "Thinking" label displayed during the model's extended thinking phase is not affected by this setting and cannot be configured.

Request: Extend the existing spinnerVerbs configuration (or add a separate setting) to allow hiding or customizing the "Thinking" label shown during extended thinking, so users who prefer a minimal/icon-only spinner experience can achieve it consistently across all phases.