Stream: Grok Prompt Navigator

Adds a PromptList button and code block collapse to grok.com chat to view user message previews

**Stream: Grok Prompt Navigator** Enhance your Grok experience with faster navigation and cleaner chats. Stream adds two lightweight, native-looking buttons to grok.com chats and projects: • **My Prompts button** – Instantly open a beautiful dropdown showing short previews of all your previous messages. Click any preview to smoothly scroll straight to that message. Perfect for long conversations and complex reasoning threads. • **Code Block Collapse button** – One click to collapse (or expand) every code block in the conversation, instantly decluttering the page when you’re focusing on text or quickly revealing code when needed. Features: - Clean, native-style UI that blends perfectly with Grok’s design - Dropdown previews (first 5 words of each of your messages) - Smooth scrolling navigation - Works on grok.com/chat/*, grok.com/c/*, and grok.com/project/* - Zero permissions, no tracking, no external resources – completely lightweight and private