diff --git a/frontend/src/app/(dashboard)/staff/page.tsx b/frontend/src/app/(dashboard)/staff/page.tsx
index ae4c389..958e489 100644
--- a/frontend/src/app/(dashboard)/staff/page.tsx
+++ b/frontend/src/app/(dashboard)/staff/page.tsx
@@ -25,7 +25,9 @@ import { Badge } from '@/components/ui/shared/Badge';
 import { Input } from '@/components/ui/shared/Input';
 import { Checkbox } from '@/components/ui/shared/Checkbox';
 import { Table } from '@/components/ui/shared/Table';
-import type { ApiError } from '@/types/api';
+import { ToastStack } from '@/components/ui/shared/Toast';
+import { formatApiErrorMessage } from '@/components/shared/formatApiError';
+import { useToast } from '@/lib/hooks/useToast';
 
 type StoredInviteLink = {
   membershipId: string;
@@ -54,14 +56,6 @@ function writeStoredInviteLinks(orgId: string, links: Record<string, StoredInvit
   window.localStorage.setItem(inviteLinksStorageKey(orgId), JSON.stringify(links));
 }
 
-function formatApiMessage(err: unknown): string {
-  if (!err || typeof err !== 'object') return 'Something went wrong';
-  const m = (err as ApiError).message;
-  if (Array.isArray(m)) return m.join(', ');
-  if (typeof m === 'string') return m;
-  return 'Something went wrong';
-}
-
 function canShareStaffInviteLink(member: StaffMemberDto): boolean {
   return !member.isOwner && member.invitationStatus !== 'ACTIVE';
 }
@@ -136,8 +130,7 @@ export default function StaffPage() {
     unlimited: boolean;
   } | null>(null);
   const [loading, setLoading] = useState(true);
-  const [error, setError] = useState('');
-  const [success, setSuccess] = useState('');
+  const toast = useToast();
 
   const [inviteOpen, setInviteOpen] = useState(false);
   const [inviteEmail, setInviteEmail] = useState('');
@@ -169,14 +162,14 @@ export default function StaffPage() {
   }, [seats]);
 
   const load = useCallback(async () => {
-    setError('');
+    toast.setError('');
     setLoading(true);
     try {
       const res = await staffApi.list();
       setMembers(res.data.members);
       setSeats(res.data.seats);
     } catch (e) {
-      setError(formatApiMessage(e));
+      toast.showError(formatApiErrorMessage(e, 'Failed to load staff.'));
     } finally {
       setLoading(false);
     }
@@ -221,17 +214,11 @@ export default function StaffPage() {
     }
   }, [currentOrganization, router]);
 
-  useEffect(() => {
-    if (!success) return;
-    const t = setTimeout(() => setSuccess(''), 4000);
-    return () => clearTimeout(t);
-  }, [success]);
-
   async function copyStaffInviteLink(member: StaffMemberDto) {
     if (!canShareStaffInviteLink(member)) return;
 
     setCopyingInviteMembershipId(member.id);
-    setError('');
+    toast.setError('');
     try {
       let invitationUrl = pendingInviteLinks[member.id]?.invitationUrl;
       if (!invitationUrl || member.invitationStatus === 'EXPIRED') {
@@ -257,7 +244,7 @@ export default function StaffPage() {
         await load();
       }
     } catch (e) {
-      setError(formatApiMessage(e));
+      toast.showError(formatApiErrorMessage(e, 'Could not copy invitation link.'));
     } finally {
       setCopyingInviteMembershipId(null);
     }
@@ -265,7 +252,7 @@ export default function StaffPage() {
 
   async function submitInvite() {
     setInviteLoading(true);
-    setError('');
+    toast.setError('');
     setLastInviteInfo(null);
     const displayName = inviteName.trim();
     const displayEmail = inviteEmail.trim();
@@ -295,14 +282,13 @@ export default function StaffPage() {
         setPendingInviteLinks(nextLinks);
         writeStoredInviteLinks(currentOrganization.id, nextLinks);
       }
-      setSuccess('');
       setInviteOpen(false);
       setInviteEmail('');
       setInviteName('');
       setInvitePerms(emptyFeaturePermissionState());
       await load();
     } catch (e) {
-      setError(formatApiMessage(e));
+      toast.showError(formatApiErrorMessage(e, 'Failed to send invitation.'));
     } finally {
       setInviteLoading(false);
     }
@@ -320,17 +306,17 @@ export default function StaffPage() {
   async function submitEdit() {
     if (!editing) return;
     setEditLoading(true);
-    setError('');
+    toast.setError('');
     try {
       await staffApi.updateMember(editing.id, {
         name: editName.trim(),
         permissionNames: permissionNamesFromFeatureState(editPerms),
       });
-      setSuccess('Member updated');
+      toast.showSuccess('Member updated.');
       setEditing(null);
       await load();
     } catch (e) {
-      setError(formatApiMessage(e));
+      toast.showError(formatApiErrorMessage(e, 'Failed to update member.'));
     } finally {
       setEditLoading(false);
     }
@@ -343,13 +329,13 @@ export default function StaffPage() {
     } else {
       if (!confirm(`Remove ${m.name} from this organization?`)) return;
     }
-    setError('');
+    toast.setError('');
     try {
       await staffApi.removeMember(m.id);
-      setSuccess('Member removed');
+      toast.showSuccess('Member removed.');
       await load();
     } catch (e) {
-      setError(formatApiMessage(e));
+      toast.showError(formatApiErrorMessage(e, 'Failed to remove member.'));
     }
   }
 
@@ -383,6 +369,8 @@ export default function StaffPage() {
         </Button>
       </div>
 
+      <ToastStack {...toast.messages} />
+
       {seats && (
         <p className="text-sm text-text-secondary">
           Seats:{' '}
@@ -400,18 +388,6 @@ export default function StaffPage() {
         </p>
       )}
 
-      {error && (
-        <div className="rounded-[var(--radius-md)] border border-red-500/40 bg-red-500/10 px-4 py-3 text-sm text-red-700 dark:text-red-300">
-          {error}
-        </div>
-      )}
-
-      {success && (
-        <div className="rounded-[var(--radius-md)] border border-primary/30 bg-primary-soft/40 px-4 py-3 text-sm text-text-primary">
-          {success}
-        </div>
-      )}
-
       {lastInviteInfo && (
         <div className="relative rounded-[var(--radius-md)] border border-border-strong bg-background-secondary/90 px-4 py-3 pr-12 shadow-[inset_0_1px_0_rgba(255,255,255,0.04)] space-y-3">
           <button
@@ -453,7 +429,7 @@ export default function StaffPage() {
                   }
                   void (async () => {
                     setCopyingInviteMembershipId(lastInviteInfo.membershipId);
-                    setError('');
+                    toast.setError('');
                     try {
                       const res = await staffApi.getInvitationLink(lastInviteInfo.membershipId);
                       if (currentOrganization?.id) {
@@ -473,7 +449,7 @@ export default function StaffPage() {
                       setCopiedInviteMembershipId(lastInviteInfo.membershipId);
                       setTimeout(() => setCopiedInviteMembershipId(null), 1500);
                     } catch (e) {
-                      setError(formatApiMessage(e));
+                      toast.showError(formatApiErrorMessage(e, 'Could not copy invitation link.'));
                     } finally {
                       setCopyingInviteMembershipId(null);
                     }