fix: user-select style and pre-create iframe in embed.js #8093
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Fixes the user-select style: Prevents the iframe element itself from being selected by adding the
'user-select: none'
property to the CSS style. This ensures that users cannot accidentally select or highlight the iframe element within the embedded content.Pre-creates the iframe: Adds functionality to pre-create the iframe when
embed.js
loads. This resolves the issue where the first click to open the iframe results in a delay, improving performance and user experience by ensuring the iframe is ready in advance.