feat(editor): enable ticket mentions on new-ticket forms and fix @mention popup layering\n\n- New Ticket page/dialog/portal now support @ to link tickets\n- Mention popup uses fixed strategy + high z-index\n- Add minimal Tippy box styling to globals.css\n- Keeps existing server-side permissions for mentions

src/components/portal/portal-ticket-form.tsx

@@ -198,6 +198,7 @@ export function PortalTicketForm() {
                 placeholder="Compartilhe passos para reproduzir, mensagens de erro ou informações adicionais."
                 className="rounded-2xl border border-slate-200 shadow-sm focus-within:border-neutral-900 focus-within:ring-neutral-900/20"
                 disabled={machineInactive || isSubmitting}
+                ticketMention={{ enabled: allowTicketMentions }}
               />
             </div>
           </div>
@@ -252,3 +253,4 @@ export function PortalTicketForm() {
     </Card>
   )
 }
+  const allowTicketMentions = true