Feature request: allow customizing spinner verb text via settings

Feature Request

Allow users to customize the rotating spinner verbs (e.g., "Thinking...", "Reasoning...") that display while Claude is processing.

Proposed Setting

A spinnerVerbs field in settings.json:

{
  "spinnerVerbs": {
    "mode": "replace",
    "verbs": ["In progress", "Processing", "Working"]
  }
}

• mode: "replace" - use only custom verbs
• mode: "append" - add custom verbs to the defaults

Use Cases

• Professional environments where playful verbs feel out of place ("In progress..." instead of whimsical text)
• Fun personalization (rotating fun facts, themed messages, etc.)
• Accessibility/localization (verbs in the user's preferred language)

Notes

spinnerTipsEnabled exists today but only toggles tips on/off. This would give users control over the verb text itself.