spinnerVerbs: Add suffix customization + fix orange shimmer emoji rendering

Summary

The spinnerVerbs setting (added in v2.1.23) allows customizing the action verbs displayed in the spinner, but the trailing ellipsis (...) is hardcoded and cannot be removed or customized.

Problem

When using custom spinner verbs that include emoji or have a specific aesthetic, the forced ... suffix creates visual redundancy:

📱 this is going on my story... (2m 35s · ↓ 1.9k tokens · thinking)
✨ **excited Claude noises** ✨...
🐕 im just a chill guy...

The ellipsis conflicts with verbs that:

• Already imply continuation or trailing off
• End with emoji that serve as natural terminators
• Have a specific stylistic choice that the ... undermines

Proposed Solution

Add a spinnerSuffix option to the spinnerVerbs configuration:

{
  "spinnerVerbs": {
    "mode": "replace",
    "verbs": ["thinking", "processing"],
    "suffix": ""
  }
}

Or a simpler boolean:

{
  "spinnerVerbs": {
    "mode": "replace", 
    "verbs": ["thinking", "processing"],
    "showEllipsis": false
  }
}

Alternatives Considered

• Including trailing spaces or zero-width characters in verb strings (hacky, may not work)
• Using tweakcc third-party tool (requires patching the installation)

Environment

• Claude Code version: 2.1.25
• OS: macOS