Summary: v0 adds File Explorer and Refactor Preview tools

Why It Matters: The platform is moving from a simple chat interface to a more complete coding environment. These new tools help developers manage multiple files and review code changes more easily.

What Changed:

• Added a File Explorer sidebar to manage project files and folders.
• Added a "Find in Files" search feature with a keyboard shortcut.
• Added a Refactor Preview section to track code improvements.
• Updated the template gallery with new featured items like "Ai Chat Interface" and "Integrations Page."
• Updated usage counts and popularity metrics for existing community templates.