add image conversion for telegram

internal/telegram/format.go

@@ -46,15 +46,19 @@ func formatMemory(mem *search.Memory, publicURL string) string {
 	return b.String()
 }
 
-// imageAttachments returns image attachments from the memo.
-func imageAttachments(memo *memos.Memo) []memos.Attachment {
-	var images []memos.Attachment
+// mediaAttachments splits memo attachments into images, videos, and audios.
+func mediaAttachments(memo *memos.Memo) (images, videos, audios []memos.Attachment) {
 	for _, att := range memo.Attachments {
-		if att.IsImage() {
+		switch {
+		case att.IsImage():
 			images = append(images, att)
+		case att.IsVideo():
+			videos = append(videos, att)
+		case att.IsAudio():
+			audios = append(audios, att)
 		}
 	}
-	return images
+	return
 }
 
 // splitText splits text into chunks of at most maxLen bytes,