직원정보수정오류 해결

frontend/employee/[id].vue

@@ -217,10 +217,15 @@ async function updateEmployee() {
   try {
     await $fetch(`/api/employee/${route.params.id}/update`, {
       method: 'PUT',
-      body: form.value
+      body: {
+        ...form.value,
+        joinDate: form.value.joinDate || null,
+        employeePhone: form.value.employeePhone || null,
+        employeePosition: form.value.employeePosition || null
+      }
     })
     alert('저장되었습니다.')
-    await loadEmployee()
+    router.push('/employee')
   } catch (e: any) {
     alert(e.data?.message || e.message || '저장에 실패했습니다.')
   } finally {