What does this PR do?

This pull request introduces several changes to src/agent/grok-agent.ts and a minor update to src/ui/components/chat-interface.tsx. The main focus is on improving code readability, adding a new utility method, and refining logic for handling specific models. Below is a summary of the most important changes:

Code readability improvements:

• Reformatted long lines of code for better readability, including console logs, token calculations, and JSON serialization. [1] [2] [3] [4]

Feature enhancements:

• Added a new utility method isGrokModel() to determine if the current model is a Grok model. This method is used to conditionally apply specific logic in multiple places. [1] [2] [3] [4]

Minor updates:

• Replaced single quotes with double quotes for consistency across the file. [1] [2] [3]
• Updated the UI to display a new symbol (≋) instead of ⚡ for the current model in the chat interface.

Fixes #48

Checklist

• I tested my changes
• I reviewed my own code