feat: Web <video> and <audio> element support src attribute (#19988)

web/app/components/base/markdown.tsx

 
 const VideoBlock: any = memo(({ node }: any) => {
   const srcs = node.children.filter((child: any) => 'properties' in child).map((child: any) => (child as any).properties.src)
-  if (srcs.length === 0)
+  if (srcs.length === 0) {
+    const src = node.properties?.src
+    if (src)
+      return <VideoGallery key={src} srcs={[src]} />
     return null
+  }
   return <VideoGallery key={srcs.join()} srcs={srcs} />
 })
 VideoBlock.displayName = 'VideoBlock'
 
 const AudioBlock: any = memo(({ node }: any) => {
   const srcs = node.children.filter((child: any) => 'properties' in child).map((child: any) => (child as any).properties.src)
-  if (srcs.length === 0)
+  if (srcs.length === 0) {
+    const src = node.properties?.src
+    if (src)
+      return <AudioGallery key={src} srcs={[src]} />
     return null
+  }
   return <AudioGallery key={srcs.join()} srcs={srcs} />
 })
 AudioBlock.displayName = 'AudioBlock'