refactor: Replace Webpack with Vite (#53)

src/pages/background/lib/deleteSchedule.ts

@@ -0,0 +1,20 @@
+import { UserScheduleStore } from '@shared/storage/UserScheduleStore';
+
+export default async function deleteSchedule(scheduleName: string): Promise<string | undefined> {
+    const [schedules, activeIndex] = await Promise.all([
+        UserScheduleStore.get('schedules'),
+        UserScheduleStore.get('activeIndex'),
+    ]);
+
+    const scheduleIndex = schedules.findIndex(schedule => schedule.name === scheduleName);
+    if (scheduleIndex === -1) {
+        return `Schedule ${scheduleName} does not exist`;
+    }
+    if (scheduleIndex === activeIndex) {
+        return 'Cannot delete active schedule';
+    }
+
+    schedules.splice(scheduleIndex, 1);
+    await UserScheduleStore.set('schedules', schedules);
+    return undefined;
+}