Fix JSX tag mismatches in mobile card layouts

Fixed build errors caused by incomplete sed script replacement.
Changed mismatched closing </CardContent> and </Card> tags to </div>
in mobile card layouts across admin pages.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/pages/admin/AdminMembers.tsx

@@ -193,8 +193,8 @@ export default function AdminMembers() {
                         {adminIds.has(member.id) ? "Hapus Admin" : "Jadikan Admin"}
                       </Button>
                     </div>
-                  </CardContent>
-                </Card>
+                  </div>
+                </div>
               ))}
               {members.length === 0 && (
                 <div className="text-center py-8 text-muted-foreground">