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/admin-user.vue

@@ -546,7 +546,7 @@ definePageMetadata(computed(() => ({
 			> .suspended, > .silenced, > .moderator {
 				display: inline-block;
 				border: solid 1px;
-				border-radius: 6px;
+				border-radius: var(--radius-sm);
 				padding: 2px 6px;
 				font-size: 85%;
 			}
@@ -638,7 +638,7 @@ definePageMetadata(computed(() => ({
 .announcementItem {
 	display: flex;
 	padding: 8px 12px;
-	border-radius: 6px;
+	border-radius: var(--radius-sm);
 	cursor: pointer;
 }
 </style>