migrate consts/datetime.js to ts

src/views/mobile/HomePage.vue

@@ -207,7 +207,7 @@ import { useUserStore } from '@/stores/user.js';
 import { useTransactionTemplatesStore } from '@/stores/transactionTemplate.js';
 import { useOverviewStore } from '@/stores/overview.js';
 
-import datetimeConstants from '@/consts/datetime.js';
+import { DateRange } from '@/core/datetime.ts';
 import { TemplateType } from '@/core/template.ts';
 import { formatUnixTime } from '@/lib/datetime.js';
 
@@ -239,7 +239,7 @@ export default {
             return allTemplates[TemplateType.Normal.type] || [];
         },
         allDateRanges() {
-            return datetimeConstants.allDateRanges;
+            return DateRange.all();
         },
         displayDateRange() {
             const self = this;