refactor(web): kit consistency — focusRing, PageTitle, Badge, size-4, icon buttons (#66)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/shell/user-menu.tsx

@@ -24,7 +24,7 @@ export function UserMenu() {
       <MenuTrigger
         render={
           <Button variant="ghost" size="sm" className="max-w-44">
-            <CircleUser className="h-4 w-4" aria-hidden />
+            <CircleUser className="size-4" aria-hidden />
             <span className="truncate">{me.email}</span>
           </Button>
         }