video thumbnail generation

still not perfect

actually cache thumbnail
simplify media id

AobaClient/src/components/media_item.rs

@@ -12,12 +12,11 @@ pub fn MediaItem(props: MediaItemProps) -> Element {
 	if let Some(item) = props.item {
 		let mtype = item.media_type().as_str_name();
 		let filename = item.file_name;
-		let id = item.media_id.unwrap().value;
-
-		let src = format!("{HOST}/m/thumb/{id}");
+		let id = item.id.unwrap().value;
+		let thumb = item.thumb_url;
 		return rsx! {
 			a { class: "mediaItem", href: "{HOST}/m/{id}", target: "_blank",
-				img { src }
+				img { src: "{HOST}{thumb}" }
 				span { class: "info",
 					span { class: "name", "{filename}" }
 					span { class: "details",