Type mutation inputs with shared Zod schemas instead of Record<string, unknown>

Replaced loose Record<string, unknown> types on useCreateTicket,
useUpdateTicket, useCreateUser, useUpdateUser, useUpdateWebhook,
and useCreateSavedView with their corresponding shared schema types.
Fixed three type errors this surfaced at call sites.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/pages/NewTicket.tsx

@@ -38,9 +38,10 @@ export default function NewTicketModal({ onClose }: NewTicketModalProps) {
   const onSubmit = async (data: CreateTicketInput) => {
     setError('');
     try {
-      const payload: Record<string, unknown> = { ...data };
-      if (!data.assigneeId) delete payload.assigneeId;
-      const created = await createTicket.mutateAsync(payload);
+      const { assigneeId, ...rest } = data;
+      const created = await createTicket.mutateAsync(
+        assigneeId ? { ...rest, assigneeId } : rest,
+      );
       onClose();
       navigate(`/${created.displayId}`);
     } catch {

client/src/pages/Tickets.tsx

@@ -154,7 +154,7 @@ export default function Tickets() {
   const currentFilters = useMemo(
     () => ({
       status: status || undefined,
-      severity: severity || undefined,
+      severity: severity ? Number(severity) : undefined,
       assigneeId: assigneeId || undefined,
       categoryId: categoryId || undefined,
       typeId: typeId || undefined,

client/src/pages/admin/Users.tsx

@@ -4,6 +4,7 @@ import { toast } from 'sonner';
 import Layout from '../../components/Layout';
 import Modal from '../../components/Modal';
 import { User, Role } from '../../types';
+import type { CreateUserInput } from '../../../../shared/schemas/user';
 import { useAuth } from '../../contexts/AuthContext';
 import {
   useUsers,
@@ -105,14 +106,13 @@ export default function AdminUsers() {
     e.preventDefault();
     setError('');
     try {
-      const payload: Record<string, string> = {
+      const created = await createUser.mutateAsync({
         username: form.username,
         email: form.email,
         displayName: form.displayName,
-        role: form.role,
-      };
-      if (form.password) payload.password = form.password;
-      const created = await createUser.mutateAsync(payload);
+        role: form.role as CreateUserInput['role'],
+        password: form.password,
+      });
       if (created.apiKey) setNewApiKey(created.apiKey);
       else closeModal();
     } catch (err: unknown) {