fix: adjust user menu button height for avatar content (#77)

Override the fixed h-6.5 from Kumo's sm size with h-auto and py-1 so
the button sizes naturally around the avatar. The sm size is still used
for text size, gap, and border-radius — only the height is overridden,
since this is a usage-specific concern (tall content inside a small
button) rather than a design system issue.

Co-authored-by: Matt Kane <mkane@cloudflare.com>

packages/admin/src/components/Header.tsx

@@ -55,7 +55,7 @@ export function Header() {
 				{/* User menu */}
 				<Popover open={userMenuOpen} onOpenChange={setUserMenuOpen}>
 					<Popover.Trigger asChild>
-						<Button variant="ghost" size="sm" className="gap-2">
+						<Button variant="ghost" size="sm" className="gap-2 py-1 h-auto">
 							{user?.avatarUrl ? (
 								<img src={user.avatarUrl} alt="" className="h-6 w-6 rounded-full object-cover" />
 							) : (