feat(web): loosen user-row layout — more breathing room

- Card row: gap-2 -> gap-3, p-3 -> p-4
- Row inner gap: gap-2 -> gap-3 (between identity block and buttons)
- Identity block: add space-y-1.5 + leading-none on username so the
  badge row has visible separation from the username
- Badge / 'you' chip gap: 1.5 -> 2
- Button group gap: 1 -> 1.5
- CardContent space between rows: space-y-3 -> space-y-4

Pure layout — no behaviour change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/app/settings/users/page.tsx

@@ -42,7 +42,7 @@ export default async function UsersPage() {
             demoted or deleted.
           </CardDescription>
         </CardHeader>
-        <CardContent className="space-y-3">
+        <CardContent className="space-y-4">
           {rows.map((u) => (
             <UserRowClient
               key={u.id}

apps/web/src/app/settings/users/user-row-client.tsx

@@ -58,11 +58,13 @@ export function UserRowClient({ user, isSelf, isLastAdmin }: UserRowClientProps)
   const deleteDisabled = pending || isSelf || isLastAdmin;
 
   return (
-    <div className="flex flex-col gap-2 rounded-lg border p-3">
+    <div className="flex flex-col gap-3 rounded-lg border p-4">
-      <div className="flex items-center justify-between gap-2">
+      <div className="flex items-center justify-between gap-3">
-        <div className="min-w-0">
+        <div className="min-w-0 space-y-1.5">
-          <p className="text-sm font-medium truncate">{user.username}</p>
+          <p className="text-sm font-medium leading-none truncate">
-          <div className="flex items-center gap-1.5">
+            {user.username}
+          </p>
+          <div className="flex items-center gap-2">
             <Badge
               variant="secondary"
               className={
@@ -78,7 +80,7 @@ export function UserRowClient({ user, isSelf, isLastAdmin }: UserRowClientProps)
             )}
           </div>
         </div>
-        <div className="flex flex-wrap justify-end gap-1">
+        <div className="flex flex-wrap justify-end gap-1.5">
           <Button
             type="button"
             size="sm"