upd: implement radius setting

to keep things manageable i merged a lot of one off values into just a
handful of common sizes, so some parts of the ui will look different than
upstream even with the "Misskey" rounding mode

packages/frontend/src/pages/user/index.files.vue

@@ -89,7 +89,7 @@ onMounted(() => {
 
 .img {
 	height: 128px;
-	border-radius: 6px;
+	border-radius: var(--radius-sm);
 	overflow: clip;
 }