Improved Iframe Embedding Process

We've made it easier to embed iframes by allowing users to paste the full embed code directly into the "Iframe URL or Embed Code" field. The system will now automatically extract the URL for you.

Key changes:

• You can now paste the full embed code into the Project dialog.
• The "Embed" button is disabled by default and will be activated once the URL is successfully extracted.
• If no URL can be extracted, an error message will appear, guiding you with: "Error: No URL found."

This update simplifies the process, making it more user-friendly and efficient.