diff --git a/src/components/tickets/ticket-summary-header.tsx b/src/components/tickets/ticket-summary-header.tsx
index 393c00b..012ee33 100644
--- a/src/components/tickets/ticket-summary-header.tsx
+++ b/src/components/tickets/ticket-summary-header.tsx
@@ -19,7 +19,7 @@ import { DeleteTicketDialog } from "@/components/tickets/delete-ticket-dialog"
 import { StatusSelect } from "@/components/tickets/status-select"
 import { CloseTicketDialog, type AdjustWorkSummaryResult } from "@/components/tickets/close-ticket-dialog"
 import { TicketCustomFieldsSection } from "@/components/tickets/ticket-custom-fields"
-import { CheckCircle2 } from "lucide-react"
+import { CheckCircle2, RotateCcw } from "lucide-react"
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
 import { Button } from "@/components/ui/button"
 import { Input } from "@/components/ui/input"
@@ -147,7 +147,8 @@ export function TicketSummaryHeader({ ticket }: TicketHeaderProps) {
         : null
   const viewerId = convexUserId ?? null
   const viewerRole = (role ?? "").toLowerCase()
-  const viewerEmail = (session?.user?.email ?? machineContext?.assignedUserEmail ?? "").trim().toLowerCase()
+  const viewerEmailRaw = session?.user?.email ?? machineContext?.assignedUserEmail ?? null
+  const viewerEmail = (viewerEmailRaw ?? "").trim().toLowerCase()
   const [status, setStatus] = useState<TicketStatus>(ticket.status)
   const rawReopenDeadline = ticket.reopenDeadline ?? null
   const fallbackClosedMs = ticket.closedAt?.getTime() ?? ticket.resolvedAt?.getTime() ?? null
@@ -174,19 +175,18 @@ export function TicketSummaryHeader({ ticket }: TicketHeaderProps) {
       return null
     }
   }, [inferredDeadline, rawReopenDeadline])
-  const viewerEmail = session?.user?.email ?? machineContext?.assignedUserEmail ?? null
   const viewerAvatar = session?.user?.avatarUrl ?? null
   const viewerAgentMeta = useMemo(
     () => {
       if (!convexUserId) return null
       return {
         id: String(convexUserId),
-        name: agentName ?? viewerEmail ?? null,
-        email: viewerEmail,
+        name: agentName ?? viewerEmailRaw ?? null,
+        email: viewerEmailRaw,
         avatarUrl: viewerAvatar,
       }
     },
-    [convexUserId, agentName, viewerEmail, viewerAvatar]
+    [convexUserId, agentName, viewerEmailRaw, viewerAvatar]
   )
   useDefaultQueues(ticket.tenantId)
   const changeAssignee = useMutation(api.tickets.changeAssignee)
@@ -1097,13 +1097,25 @@ export function TicketSummaryHeader({ ticket }: TicketHeaderProps) {
   return (
     <div id="ticket-summary-header" className={cardClass}>
       <div className="absolute right-6 top-6 flex items-center gap-3">
-        <Button
-          type="button"
-          className="inline-flex items-center gap-2 rounded-lg border border-sidebar-border bg-sidebar-accent px-3 py-1.5 text-sm font-semibold text-sidebar-accent-foreground transition-all duration-200 ease-out hover:-translate-y-0.5 hover:border-sidebar-ring hover:bg-sidebar-accent focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--sidebar-ring)]/30 active:translate-y-0 active:border-sidebar-ring"
-          onClick={() => setCloseOpen(true)}
-        >
-          <CheckCircle2 className="size-4" /> Encerrar
-        </Button>
+        {status !== "RESOLVED" ? (
+          <Button
+            type="button"
+            className="inline-flex items-center gap-2 rounded-lg border border-sidebar-border bg-sidebar-accent px-3 py-1.5 text-sm font-semibold text-sidebar-accent-foreground transition-all duration-200 ease-out hover:-translate-y-0.5 hover:border-sidebar-ring hover:bg-sidebar-accent focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--sidebar-ring)]/30 active:translate-y-0 active:border-sidebar-ring"
+            onClick={() => setCloseOpen(true)}
+          >
+            <CheckCircle2 className="size-4" /> Encerrar
+          </Button>
+        ) : canReopenTicket ? (
+          <Button
+            type="button"
+            className="inline-flex items-center gap-2 rounded-lg border border-sidebar-border bg-white px-3 py-1.5 text-sm font-semibold text-neutral-800 transition-all duration-200 ease-out hover:-translate-y-0.5 hover:border-sidebar-ring hover:bg-slate-50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--sidebar-ring)]/30 active:translate-y-0 active:border-sidebar-ring"
+            onClick={handleReopenTicket}
+            disabled={isReopening}
+          >
+            {isReopening ? <Spinner className="size-4 text-neutral-600" /> : <RotateCcw className="size-4" />}
+            Reabrir
+          </Button>
+        ) : null}
         {workSummary ? (
           <Tooltip>
             <TooltipTrigger asChild>