Summary: draw.io adds collaboration and sharing features

Why It Matters: The tool is moving from a solo diagram editor to a team-based workspace. This makes it more useful for groups working together in real-time.

What Changed:

• Added a "Share" button to the main interface.
• Added a "Comments" section for user feedback.
• Added a "Change user" option for account management.
• Updated the page title from "Page-1" to "draw.io".
• Removed several legacy toolbar icons including Undo, Redo, and specific shape shortcuts from the footer area.