When iframe code is pasted, inject it into the editor

web/components/contract/contract-description.tsx

@@ -99,9 +99,6 @@ function RichEditContract(props: { contract: Contract; isAdmin?: boolean }) {
               .setContent(contract.description)
               .focus('end')
               .insertContent(`<p>${editTimestamp()}</p>`)
-              .insertContent(
-                `<iframe src="https://manifold.markets/embed/Austin/how-many-upvotes-will-the-new-versi" frameborder="0"></iframe>`
-              )
               .run()
           }}
         >

web/components/editor.tsx

@@ -71,12 +71,20 @@ export function useTextEditor(props: {
           (file) => file.type.startsWith('image')
         )
 
-        if (!imageFiles.length) {
-          return // if no files pasted, use default paste handler
-        }
-
+        if (imageFiles.length) {
           event.preventDefault()
           upload.mutate(imageFiles)
+        }
+
+        // If the pasted content is iframe code, directly inject it
+        const text = event.clipboardData?.getData('text/plain').trim() ?? ''
+        const isValidIframe = /^<iframe.*<\/iframe>$/.test(text)
+        if (isValidIframe) {
+          editor.chain().insertContent(text).run()
+          return true // Prevent the code from getting pasted as text
+        }
+
+        return // Otherwise, use default paste handler
       },
     },
   })