diff --git a/src/app/(modules)/ticket/[ticketId]/assign/components/AssignTicketForm.tsx b/src/app/(modules)/ticket/[ticketId]/assign/components/AssignTicketForm.tsx
new file mode 100644
index 0000000..d762852
--- /dev/null
+++ b/src/app/(modules)/ticket/[ticketId]/assign/components/AssignTicketForm.tsx
@@ -0,0 +1,139 @@
+'use client';
+
+import { useMemo, useState } from 'react';
+import { Mail, Phone, Send, ShieldCheck, Users } from 'lucide-react';
+
+import { DatePickerSimple } from '@/components/form/DatePickerSimple';
+import { AssignableWorkerSelect } from '@/components/lookups/AssignableWorkerSelect';
+import { Button } from '@/components/ui/button';
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
+import { Label } from '@/components/ui/label';
+import { Textarea } from '@/components/ui/textarea';
+import type { AssignableTicketUser } from '@/types';
+
+import { useAssignTicketMutation } from '../../../hooks/useTicketQueries';
+
+interface AssignTicketFormProps {
+  ticketId: string;
+  onAssigned: () => void;
+}
+
+export function AssignTicketForm({
+  ticketId,
+  onAssigned,
+}: AssignTicketFormProps) {
+  const [selectedUserId, setSelectedUserId] = useState('');
+  const [selectedContractor, setSelectedContractor] =
+    useState<AssignableTicketUser | null>(null);
+  const [dueDate, setDueDate] = useState<Date>();
+  const [assignNote, setAssignNote] = useState('');
+
+  const assignMutation = useAssignTicketMutation(ticketId);
+  const today = useMemo(() => {
+    const date = new Date();
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }, []);
+  const maxDueMonth = useMemo(
+    () => new Date(today.getFullYear() + 20, 11),
+    [today],
+  );
+
+  return (
+    <Card>
+      <CardHeader>
+        <CardTitle className="flex items-center gap-2 text-base">
+          <Users className="text-primary" />
+          Contractor and schedule
+        </CardTitle>
+      </CardHeader>
+      <CardContent>
+        <div className="space-y-5">
+          <div className="space-y-2">
+            <Label>
+              Contractor <span className="text-destructive">*</span>
+            </Label>
+            <AssignableWorkerSelect
+              value={selectedUserId}
+              onValueChange={(userId, user) => {
+                setSelectedUserId(userId);
+                setSelectedContractor(user);
+              }}
+              disabled={assignMutation.isPending}
+            />
+          </div>
+
+          {selectedContractor ? (
+            <div className="space-y-2 rounded-lg border bg-muted/30 p-4">
+              <p className="text-sm font-medium">Contractor details</p>
+              {selectedContractor.phone_number ? (
+                <p className="flex items-center gap-2 text-sm text-muted-foreground">
+                  <Phone className="size-4 shrink-0" />
+                  {selectedContractor.phone_number}
+                </p>
+              ) : null}
+              <p className="flex items-center gap-2 text-sm text-muted-foreground">
+                <Mail className="size-4 shrink-0" />
+                <span className="truncate">{selectedContractor.email}</span>
+              </p>
+              <p className="flex items-center gap-2 text-sm text-muted-foreground">
+                <ShieldCheck className="size-4 shrink-0" />
+                {selectedContractor.role.name}
+              </p>
+            </div>
+          ) : null}
+
+          <div className="space-y-2">
+            <Label htmlFor="assign-due-date">
+              Due date <span className="text-destructive">*</span>
+            </Label>
+            <DatePickerSimple
+              id="assign-due-date"
+              value={dueDate}
+              onChange={setDueDate}
+              showLabel={false}
+              placeholder="Select due date"
+              disabled={assignMutation.isPending}
+              className="w-full"
+              startMonth={today}
+              endMonth={maxDueMonth}
+              disabledDates={{ before: today }}
+            />
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="assign-note">Assignment note (optional)</Label>
+            <Textarea
+              id="assign-note"
+              value={assignNote}
+              onChange={(event) => setAssignNote(event.target.value)}
+              placeholder="Add instructions or notes for the contractor..."
+              disabled={assignMutation.isPending}
+            />
+          </div>
+
+          <Button
+            type="button"
+            disabled={!selectedUserId || !dueDate || assignMutation.isPending}
+            onClick={() => {
+              if (!selectedUserId || !dueDate) return;
+
+              assignMutation.mutate(
+                {
+                  assigned_to_user_id: Number(selectedUserId),
+                  due_at: dueDate.toISOString(),
+                  note: assignNote || undefined,
+                },
+                { onSuccess: onAssigned },
+              );
+            }}
+            className="w-full sm:w-auto"
+          >
+            <Send />
+            {assignMutation.isPending ? 'Assigning...' : 'Assign ticket'}
+          </Button>
+        </div>
+      </CardContent>
+    </Card>
+  );
+}
diff --git a/src/app/(modules)/ticket/[ticketId]/assign/components/ChooseIssuesSection.tsx b/src/app/(modules)/ticket/[ticketId]/assign/components/ChooseIssuesSection.tsx
new file mode 100644
index 0000000..a0e0a32
--- /dev/null
+++ b/src/app/(modules)/ticket/[ticketId]/assign/components/ChooseIssuesSection.tsx
@@ -0,0 +1,102 @@
+'use client';
+
+import { useEffect, useMemo, useState } from 'react';
+import { Search } from 'lucide-react';
+
+import { MultiSelectPopover } from '@/components/form/MultiSelectPopover';
+import { Input } from '@/components/ui/input';
+import { useDebounce } from '@/hooks/useDebounce';
+
+import { useTicketDetectionsQuery } from '../../../hooks/useTicketQueries';
+import { useIssueColumns } from './IssueColumns';
+import { IssueTable } from './IssueTable';
+
+const DEFAULT_PAGE_SIZE = 10;
+
+interface IssueTypeOption {
+  class_name: string;
+  display_name: string;
+  count: number;
+}
+
+interface ChooseIssuesSectionProps {
+  videoId?: string;
+  issueTypes: IssueTypeOption[];
+}
+
+export function ChooseIssuesSection({
+  videoId,
+  issueTypes,
+}: ChooseIssuesSectionProps) {
+  const [selectedIssueTypes, setSelectedIssueTypes] = useState<string[]>([]);
+  const [detectionSearch, setDetectionSearch] = useState('');
+  const [skip, setSkip] = useState(0);
+  const [limit, setLimit] = useState(DEFAULT_PAGE_SIZE);
+  const debouncedSearch = useDebounce(detectionSearch.trim(), 350);
+  const columns = useIssueColumns();
+  const issueTypeOptions = useMemo(
+    () =>
+      issueTypes.map((issue) => ({
+        value: issue.class_name,
+        label: `${issue.display_name} (${issue.count})`,
+      })),
+    [issueTypes],
+  );
+
+  useEffect(() => {
+    setSkip(0);
+  }, [debouncedSearch, selectedIssueTypes]);
+
+  const queryParams = useMemo(
+    () => ({
+      skip,
+      limit,
+      class_name:
+        selectedIssueTypes.length > 0 ? selectedIssueTypes : undefined,
+      search: debouncedSearch || undefined,
+      sort: 'timestamp_asc',
+    }),
+    [debouncedSearch, limit, selectedIssueTypes, skip],
+  );
+  const detectionsQuery = useTicketDetectionsQuery(videoId, queryParams);
+  const result = detectionsQuery.data;
+
+  return (
+    <IssueTable
+      columns={columns}
+      issues={result?.items ?? []}
+      isLoading={detectionsQuery.isLoading || detectionsQuery.isFetching}
+      isError={detectionsQuery.isError}
+      toolbar={
+        <div className="flex flex-col gap-3 sm:flex-row sm:items-center">
+          <div className="w-fit">
+            <MultiSelectPopover
+              label="Issue Types"
+              options={issueTypeOptions}
+              values={selectedIssueTypes}
+              onValuesChange={setSelectedIssueTypes}
+              searchPlaceholder="Search issue types"
+              emptyMessage="No issue types found."
+              align="start"
+            />
+          </div>
+          <div className="relative w-full sm:ml-auto sm:w-72">
+            <Search className="pointer-events-none absolute top-1/2 left-3 size-4 -translate-y-1/2 text-muted-foreground" />
+            <Input
+              value={detectionSearch}
+              onChange={(event) => setDetectionSearch(event.target.value)}
+              placeholder="Search by detection ID"
+              aria-label="Search by detection ID"
+              className="pl-9"
+            />
+          </div>
+        </div>
+      }
+      skip={skip}
+      limit={limit}
+      total={result?.total ?? 0}
+      onPageChange={setSkip}
+      onLimitChange={setLimit}
+    />
+  );
+}
diff --git a/src/app/(modules)/ticket/[ticketId]/assign/components/IssueColumns.tsx b/src/app/(modules)/ticket/[ticketId]/assign/components/IssueColumns.tsx
new file mode 100644
index 0000000..e89743f
--- /dev/null
+++ b/src/app/(modules)/ticket/[ticketId]/assign/components/IssueColumns.tsx
@@ -0,0 +1,52 @@
+'use client';
+
+import { useMemo } from 'react';
+import type { ColumnDef } from '@tanstack/react-table';
+
+import type { DetectionResultItem } from '@/types';
+
+function formatTimestamp(seconds: number) {
+  const minutes = Math.floor(seconds / 60);
+  const remainingSeconds = Math.floor(seconds % 60);
+  return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}`;
+}
+
+export function useIssueColumns(): ColumnDef<DetectionResultItem>[] {
+  return useMemo(
+    () => [
+      {
+        id: 'detection_id',
+        header: 'Detection ID',
+        size: 140,
+        cell: ({ row }) => `#${row.original.detection.id}`,
+      },
+      {
+        id: 'issue_type',
+        header: 'Issue Type',
+        size: 180,
+        cell: ({ row }) => row.original.detection.display_name,
+      },
+      {
+        id: 'confidence',
+        header: 'Confidence',
+        size: 130,
+        cell: ({ row }) =>
+          `${Math.round(row.original.detection.confidence * 100)}%`,
+      },
+      {
+        id: 'frame',
+        header: 'Frame',
+        size: 100,
+        cell: ({ row }) => row.original.frame.number,
+      },
+      {
+        id: 'timestamp',
+        header: 'Timestamp',
+        size: 130,
+        cell: ({ row }) =>
+          formatTimestamp(row.original.frame.timestamp_seconds),
+      },
+    ],
+    [],
+  );
+}
diff --git a/src/app/(modules)/ticket/[ticketId]/assign/components/IssueTable.tsx b/src/app/(modules)/ticket/[ticketId]/assign/components/IssueTable.tsx
new file mode 100644
index 0000000..43edc35
--- /dev/null
+++ b/src/app/(modules)/ticket/[ticketId]/assign/components/IssueTable.tsx
@@ -0,0 +1,56 @@
+'use client';
+
+import type { ReactNode } from 'react';
+import type { ColumnDef } from '@tanstack/react-table';
+
+import { DataTable } from '@/components/data-table';
+import type { DetectionResultItem } from '@/types';
+
+interface IssueTableProps {
+  columns: ColumnDef<DetectionResultItem>[];
+  issues: DetectionResultItem[];
+  isLoading: boolean;
+  isError: boolean;
+  toolbar: ReactNode;
+  skip: number;
+  limit: number;
+  total: number;
+  onPageChange: (skip: number) => void;
+  onLimitChange: (limit: number) => void;
+}
+
+export function IssueTable({
+  columns,
+  issues,
+  isLoading,
+  isError,
+  toolbar,
+  skip,
+  limit,
+  total,
+  onPageChange,
+  onLimitChange,
+}: IssueTableProps) {
+  return (
+    <DataTable
+      title="Choose Issues"
+      columns={columns}
+      data={issues}
+      isLoading={isLoading}
+      toolbar={toolbar}
+      emptyTitle={isError ? 'Failed to load issues.' : 'No issues found.'}
+      emptyDescription={
+        isError
+          ? 'Please try again.'
+          : 'No detections match the current filters.'
+      }
+      pagination={{
+        skip,
+        limit,
+        totalItems: total,
+        onPageChange,
+        onLimitChange,
+      }}
+    />
+  );
+}
diff --git a/src/app/(modules)/ticket/[ticketId]/assign/page.tsx b/src/app/(modules)/ticket/[ticketId]/assign/page.tsx
new file mode 100644
index 0000000..912588f
--- /dev/null
+++ b/src/app/(modules)/ticket/[ticketId]/assign/page.tsx
@@ -0,0 +1,139 @@
+'use client';
+
+import { useParams, useRouter } from 'next/navigation';
+import { AlertTriangle, ArrowLeft, LockKeyhole } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+import { Card, CardContent } from '@/components/ui/card';
+import { Skeleton } from '@/components/ui/skeleton';
+import { PERMISSIONS } from '@/constants/permissions';
+import { PermissionGuard } from '@/guards';
+import { ROUTES } from '@/utils/routes';
+
+import { useTicketOverviewQuery } from '../../hooks/useTicketQueries';
+import { AssignTicketForm } from './components/AssignTicketForm';
+import { ChooseIssuesSection } from './components/ChooseIssuesSection';
+
+function AssignmentPageSkeleton() {
+  return (
+    <div className="space-y-5" aria-label="Loading assignment workspace">
+      <div className="flex items-center gap-3">
+        <Skeleton className="size-10 rounded-lg" />
+        <div className="space-y-2">
+          <Skeleton className="h-7 w-56" />
+          <Skeleton className="h-4 w-40" />
+        </div>
+      </div>
+      <div className="grid gap-5 xl:grid-cols-[minmax(0,1fr)_360px]">
+        <Skeleton className="h-[540px] rounded-xl" />
+        <Skeleton className="h-[430px] rounded-xl" />
+      </div>
+    </div>
+  );
+}
+
+export default function TicketAssignmentPage() {
+  const router = useRouter();
+  const { ticketId } = useParams() as { ticketId: string };
+  const overviewQuery = useTicketOverviewQuery(ticketId);
+  const overview = overviewQuery.data;
+  const videoId = overview?.video_id ?? overview?.video?.id ?? undefined;
+  const ticketDetailUrl = ROUTES.TICKET_DETAIL(ticketId);
+  const backToTicket = () => router.push(ticketDetailUrl);
+
+  if (overviewQuery.isLoading) {
+    return <AssignmentPageSkeleton />;
+  }
+
+  if (overviewQuery.isError || !overview) {
+    return (
+      <Card>
+        <CardContent className="flex min-h-80 flex-col items-center justify-center gap-3 text-center">
+          <AlertTriangle className="size-8 text-destructive" />
+          <div>
+            <p className="font-semibold">
+              Unable to open the assignment workspace.
+            </p>
+            <p className="mt-1 text-sm text-muted-foreground">
+              Ticket information is unavailable.
+            </p>
+          </div>
+          <div className="flex gap-2">
+            <Button type="button" variant="outline" onClick={backToTicket}>
+              Back to ticket
+            </Button>
+            <Button type="button" onClick={() => void overviewQuery.refetch()}>
+              Retry
+            </Button>
+          </div>
+        </CardContent>
+      </Card>
+    );
+  }
+
+  const ticketLabel = overview.ticket_name || overview.id;
+
+  return (
+    <main className="relative z-10 space-y-5">
+      <header className="flex items-start gap-3">
+        <Button
+          type="button"
+          variant="secondary"
+          size="icon"
+          onClick={backToTicket}
+          aria-label="Back to ticket"
+          className="shrink-0"
+        >
+          <ArrowLeft />
+        </Button>
+        <div className="min-w-0 space-y-1">
+          <h1 className="text-2xl font-semibold tracking-tight">
+            Assign ticket
+          </h1>
+          <p className="truncate text-sm text-muted-foreground">
+            Ticket: {ticketLabel}
+          </p>
+        </div>
+      </header>
+
+      <div className="grid min-w-0 items-start gap-5 xl:grid-cols-[minmax(0,1fr)_360px]">
+        <ChooseIssuesSection
+          videoId={videoId}
+          issueTypes={overview.ai_result.detections_by_class}
+        />
+
+        <aside className="min-w-0 xl:sticky xl:top-0">
+          <PermissionGuard
+            permissions={PERMISSIONS.TICKET.ASSIGN}
+            fallback={
+              <Card>
+                <CardContent className="flex min-h-72 flex-col items-center justify-center text-center">
+                  <LockKeyhole className="size-8 text-muted-foreground" />
+                  <p className="mt-3 font-semibold">
+                    Assignment access required
+                  </p>
+                  <p className="mt-1 max-w-sm text-sm text-muted-foreground">
+                    You do not have permission to assign this ticket.
+                  </p>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    className="mt-4"
+                    onClick={backToTicket}
+                  >
+                    Back to ticket
+                  </Button>
+                </CardContent>
+              </Card>
+            }
+          >
+            <AssignTicketForm
+              ticketId={ticketId}
+              onAssigned={() => router.replace(ticketDetailUrl)}
+            />
+          </PermissionGuard>
+        </aside>
+      </div>
+    </main>
+  );
+}
diff --git a/src/app/(modules)/ticket/[ticketId]/components/TicketDetailHeader.tsx b/src/app/(modules)/ticket/[ticketId]/components/TicketDetailHeader.tsx
index 188d09a..7b0f1da 100644
--- a/src/app/(modules)/ticket/[ticketId]/components/TicketDetailHeader.tsx
+++ b/src/app/(modules)/ticket/[ticketId]/components/TicketDetailHeader.tsx
@@ -4,12 +4,18 @@ import { ArrowLeft } from 'lucide-react';
 import { useRouter } from 'next/navigation';
 
 import { Button } from '@/components/ui/button';
+import { PERMISSIONS } from '@/constants/permissions';
+import { PermissionGuard } from '@/guards';
 import type { TicketOverviewDetail } from '@/types';
 
+import { AssignTicketAction } from './actions/AssignTicketAction';
+
 export function TicketDetailHeader({
   ticket,
+  canAssign = false,
 }: {
   ticket: TicketOverviewDetail;
+  canAssign?: boolean;
 }) {
   const router = useRouter();
   const ticketLabel = ticket.ticket_name || ticket.id;
@@ -22,10 +28,12 @@ export function TicketDetailHeader({
       </div>
 
       <div className="flex shrink-0 items-center gap-2">
-        <Button
-          variant="secondary"
-          onClick={() => router.push('/ticket')}
-        >
+        {canAssign ? (
+          <PermissionGuard permissions={PERMISSIONS.TICKET.ASSIGN}>
+            <AssignTicketAction ticketId={ticket.id} />
+          </PermissionGuard>
+        ) : null}
+        <Button variant="secondary" onClick={() => router.push('/ticket')}>
           <ArrowLeft className="size-4" />
           Back to List
         </Button>
diff --git a/src/app/(modules)/ticket/[ticketId]/components/TicketStatusActions.tsx b/src/app/(modules)/ticket/[ticketId]/components/TicketStatusActions.tsx
index 1b02c7f..8b3d8e9 100644
--- a/src/app/(modules)/ticket/[ticketId]/components/TicketStatusActions.tsx
+++ b/src/app/(modules)/ticket/[ticketId]/components/TicketStatusActions.tsx
@@ -5,7 +5,6 @@ import { PermissionGuard } from '@/guards';
 import type { TicketDetail } from '@/types';
 
 import { AssignedContractorAction } from './actions/AssignedContractorAction';
-import { AssignTicketAction } from './actions/AssignTicketAction';
 import { ClosedTicketAction } from './actions/ClosedTicketAction';
 import { NoTicketAction } from './actions/NoTicketAction';
 import { OpenRepairReviewAction } from './actions/OpenRepairReviewAction';
@@ -18,14 +17,7 @@ interface TicketStatusActionsProps {
 
 function getTicketAction(ticket: TicketDetail) {
   if (ticket.assignment_status === 'unassigned') {
-    return (
-      <PermissionGuard
-        permissions={PERMISSIONS.TICKET.ASSIGN}
-        fallback={<NoTicketAction />}
-      >
-        <AssignTicketAction ticket={ticket} />
-      </PermissionGuard>
-    );
+    return null;
   }
 
   if (ticket.assignment_status === 'assigned') {
@@ -71,5 +63,7 @@ function getTicketAction(ticket: TicketDetail) {
 }
 
 export function TicketStatusActions({ ticket }: TicketStatusActionsProps) {
-  return <div className="space-y-3">{getTicketAction(ticket)}</div>;
+  const action = getTicketAction(ticket);
+
+  return action ? <div className="space-y-3">{action}</div> : null;
 }
diff --git a/src/app/(modules)/ticket/[ticketId]/components/actions/AssignTicketAction.tsx b/src/app/(modules)/ticket/[ticketId]/components/actions/AssignTicketAction.tsx
index 921640c..c9a4232 100644
--- a/src/app/(modules)/ticket/[ticketId]/components/actions/AssignTicketAction.tsx
+++ b/src/app/(modules)/ticket/[ticketId]/components/actions/AssignTicketAction.tsx
@@ -1,111 +1,21 @@
 'use client';
 
-import { useMemo, useState } from 'react';
-import { Users, Mail, Phone, Send, ShieldCheck } from 'lucide-react';
+import { Users } from 'lucide-react';
+import { useRouter } from 'next/navigation';
 
-import { DatePickerSimple } from '@/components/form/DatePickerSimple';
 import { Button } from '@/components/ui/button';
-import { Label } from '@/components/ui/label';
-import { Textarea } from '@/components/ui/textarea';
-import { AssignableWorkerSelect } from '@/components/lookups/AssignableWorkerSelect';
-import type { AssignableTicketUser, TicketDetail } from '@/types';
+import { ROUTES } from '@/utils/routes';
 
-import { useAssignTicketMutation } from '../../../hooks/useTicketQueries';
-import { TicketActionCard } from './TicketActionCard';
-
-export function AssignTicketAction({ ticket }: { ticket: TicketDetail }) {
-  const [selectedUserId, setSelectedUserId] = useState('');
-  const [selectedContractor, setSelectedContractor] =
-    useState<AssignableTicketUser | null>(null);
-  const [dueDate, setDueDate] = useState<Date>();
-  const [assignNote, setAssignNote] = useState('');
-
-  const assignMutation = useAssignTicketMutation(ticket.id);
-  const today = useMemo(() => {
-    const date = new Date();
-    date.setHours(0, 0, 0, 0);
-    return date;
-  }, []);
-  const maxDueMonth = useMemo(
-    () => new Date(today.getFullYear() + 20, 11),
-    [today],
-  );
+export function AssignTicketAction({ ticketId }: { ticketId: string }) {
+  const router = useRouter();
 
   return (
-    <TicketActionCard icon={Users} title="Assign to Contractor">
-      <div className="space-y-4">
-        <div className="space-y-2">
-          <Label>Contractor *</Label>
-          <AssignableWorkerSelect
-            value={selectedUserId}
-            onValueChange={(userId, user) => {
-              setSelectedUserId(userId);
-              setSelectedContractor(user);
-            }}
-            disabled={assignMutation.isPending}
-          />
-        </div>
-        {selectedContractor ? (
-          <div className="space-y-2 rounded-lg border bg-muted/30 p-3">
-            <p className="text-sm font-medium">Contractor Details</p>
-            {selectedContractor.phone_number ? (
-              <p className="flex items-center gap-2 text-sm text-muted-foreground">
-                <Phone className="size-4 shrink-0" />
-                {selectedContractor.phone_number}
-              </p>
-            ) : null}
-            <p className="flex items-center gap-2 text-sm text-muted-foreground">
-              <Mail className="size-4 shrink-0" />
-              <span className="truncate">{selectedContractor.email}</span>
-            </p>
-            <p className="flex items-center gap-2 text-sm text-muted-foreground">
-              <ShieldCheck className="size-4 shrink-0" />
-              {selectedContractor.role.name}
-            </p>
-          </div>
-        ) : null}
-        <div className="space-y-2">
-          <Label htmlFor="assign-due-date">
-            Due Date <span className="text-destructive">*</span>
-          </Label>
-          <DatePickerSimple
-            id="assign-due-date"
-            value={dueDate}
-            onChange={setDueDate}
-            showLabel={false}
-            placeholder="Select due date"
-            disabled={assignMutation.isPending}
-            className="w-full"
-            startMonth={today}
-            endMonth={maxDueMonth}
-            disabledDates={{ before: today }}
-          />
-        </div>
-        <div className="space-y-2">
-          <Label>Assignment Note (Optional)</Label>
-          <Textarea
-            value={assignNote}
-            onChange={(event) => setAssignNote(event.target.value)}
-            placeholder="Add any instructions or notes for the contractor..."
-          />
-        </div>
-        <Button
-          disabled={!selectedUserId || !dueDate || assignMutation.isPending}
-          onClick={() => {
-            if (!selectedUserId || !dueDate) return;
-            assignMutation.mutate({
-              assigned_to_user_id: Number(selectedUserId),
-              defect_class: ticket.defect_class,
-              due_at: dueDate.toISOString(),
-              note: assignNote || undefined,
-            });
-          }}
-          className="w-full"
-        >
-          <Send />
-          Assign Ticket
-        </Button>
-      </div>
-    </TicketActionCard>
+    <Button
+      type="button"
+      onClick={() => router.push(ROUTES.TICKET_ASSIGN(ticketId))}
+    >
+      <Users />
+      Assign Ticket
+    </Button>
   );
 }
diff --git a/src/app/(modules)/ticket/[ticketId]/page.tsx b/src/app/(modules)/ticket/[ticketId]/page.tsx
index 97abea1..7f462be 100644
--- a/src/app/(modules)/ticket/[ticketId]/page.tsx
+++ b/src/app/(modules)/ticket/[ticketId]/page.tsx
@@ -61,7 +61,10 @@ export default function TicketDetailPage() {
     <main className="relative z-10 space-y-5 xl:flex xl:h-[calc(100vh-6.5rem)] xl:min-h-0 xl:flex-col xl:gap-5 xl:space-y-0 xl:overflow-hidden">
       <div className="xl:shrink-0">
         {overview ? (
-          <TicketDetailHeader ticket={overview} />
+          <TicketDetailHeader
+            ticket={overview}
+            canAssign={classDetail?.status === 'unassigned'}
+          />
         ) : (
           <TicketOverviewHeaderSkeleton />
         )}
diff --git a/src/app/(modules)/ticket/hooks/useTicketQueries.ts b/src/app/(modules)/ticket/hooks/useTicketQueries.ts
index 76d5e00..bac8afa 100644
--- a/src/app/(modules)/ticket/hooks/useTicketQueries.ts
+++ b/src/app/(modules)/ticket/hooks/useTicketQueries.ts
@@ -91,7 +91,7 @@ export function useTicketDefectClassesQuery(ticketId: string | undefined) {
   });
 }
 
-export function useTicketClassDetectionsQuery(
+export function useTicketDetectionsQuery(
   videoId: string | undefined,
   params: VideoDetectionsParams,
 ) {
@@ -118,10 +118,17 @@ export function useTicketClassDetectionsQuery(
     queryKey: ticketKeys.classDetections(videoId ?? '', queryParams),
     queryFn: () =>
       videoService.getVideoDetections(videoId as string, queryParams),
-    enabled: Boolean(videoId && queryParams.class_name),
+    enabled: Boolean(videoId),
   });
 }
 
+export function useTicketClassDetectionsQuery(
+  videoId: string | undefined,
+  params: VideoDetectionsParams,
+) {
+  return useTicketDetectionsQuery(videoId, params);
+}
+
 export function useTicketClassReviewDetectionsQuery(
   videoId: string | undefined,
   defectClass: string | undefined,
@@ -282,13 +289,14 @@ export function useAssignTicketMutation(ticketId: string) {
   return useMutation({
     mutationFn: (payload: AssignTicketPayload) =>
       ticketService.assignTicket(ticketId, payload),
-    onSuccess: (ticket, payload) => {
+    onSuccess: async () => {
       toast.success('Ticket assigned');
-      queryClient.setQueryData<TicketDetail>(
-        ticketKeys.classDetail(ticketId, payload.defect_class),
-        (current) => mergeTicketDetailResponse(current, ticket),
-      );
-      queryClient.invalidateQueries({ queryKey: ticketKeys.lists() });
+      await Promise.all([
+        queryClient.invalidateQueries({
+          queryKey: [...ticketKeys.details(), ticketId],
+        }),
+        queryClient.invalidateQueries({ queryKey: ticketKeys.lists() }),
+      ]);
     },
     onError: () => toast.error('Failed to assign ticket'),
   });
diff --git a/src/services/api/video.service.ts b/src/services/api/video.service.ts
index 94d5bbe..e037515 100644
--- a/src/services/api/video.service.ts
+++ b/src/services/api/video.service.ts
@@ -79,6 +79,9 @@ export const videoService = {
           sort: params?.sort ?? 'timestamp_asc',
           search: params?.search,
         },
+        paramsSerializer: {
+          indexes: null,
+        },
       },
     );
     return response.data;
diff --git a/src/types/ticket/actions.ts b/src/types/ticket/actions.ts
index 9c1485e..899c8a5 100644
--- a/src/types/ticket/actions.ts
+++ b/src/types/ticket/actions.ts
@@ -24,7 +24,6 @@ export interface AssignableTicketUsersResponse {
 
 export interface AssignTicketPayload {
   assigned_to_user_id: number;
-  defect_class: string;
   due_at: string;
   note?: string;
 }
diff --git a/src/utils/routes.ts b/src/utils/routes.ts
index 15285fa..197c753 100644
--- a/src/utils/routes.ts
+++ b/src/utils/routes.ts
@@ -16,6 +16,7 @@ export const ROUTES = {
   UPLOAD: '/upload',
   TICKET: '/ticket',
   TICKET_DETAIL: (ticketId: string) => `/ticket/${ticketId}`,
+  TICKET_ASSIGN: (ticketId: string) => `/ticket/${ticketId}/assign`,
   TICKET_CLASS_REVIEW: (ticketId: string, defectClass: string) =>
     `/ticket/${ticketId}/${defectClass}/review`,
 } as const;