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/AdminConsulting.tsx

@@ -484,8 +484,8 @@ export default function AdminConsulting() {
                             </Button>
                           </div>
                         )}
-                      </CardContent>
-                    </Card>
+                      </div>
+                    </div>
                   ))}
                   {upcomingSlots.length === 0 && (
                     <div className="text-center py-8 text-muted-foreground">
@@ -565,8 +565,8 @@ export default function AdminConsulting() {
                             <Badge variant="outline" className="text-xs">{slot.topic_category}</Badge>
                           </div>
                         </div>
-                      </CardContent>
-                    </Card>
+                      </div>
+                    </div>
                   ))}
                   {pastSlots.length === 0 && (
                     <div className="text-center py-8 text-muted-foreground">