调整 api 目录，代码优化

src/views/system/dict/form.vue

@@ -16,7 +16,7 @@
 </template>
 
 <script>
-import { add, edit } from '@/api/dict'
+import { add, edit } from '@/api/system/dict'
 export default {
   props: {
     isAdd: {

src/views/system/dict/index.vue

@@ -92,7 +92,7 @@
 <script>
 import checkPermission from '@/utils/permission'
 import initData from '@/mixins/initData'
-import { del, downloadDict } from '@/api/dict'
+import { del, downloadDict } from '@/api/system/dict'
 import dictDetail from '../dictDetail/index'
 import { downloadFile } from '@/utils/index'
 import eForm from './form'