Fix typecheck.

frontend/app/components/TaskForm.tsx

@@ -10,6 +10,7 @@ import {
   Paper,
   Typography,
   Alert,
+  type SelectChangeEvent,
 } from '@mui/material'
 import { useNavigate } from 'react-router'
 import type { CreateTaskRequest, Task } from '~/types/task'
@@ -134,12 +135,10 @@ export function TaskForm({
       }
     }
 
-  const handleStatusChange = (
-    e: React.ChangeEvent<{ name?: string; value: unknown }>
-  ) => {
+  const handleStatusChange = (event: SelectChangeEvent<TaskStatus>) => {
     setFormData(prev => ({
       ...prev,
-      status: e.target.value as TaskStatus,
+      status: event.target.value as TaskStatus,
     }))
   }