Clean data and update mockup api spec

cms/src/routes/qualifying/+page.server.ts

@@ -1,4 +1,5 @@
 
+import { error } from '@sveltejs/kit';
 import type {CalendarEvent,Exam} from '$lib/data/CMSDataType'
 import dayjs from 'dayjs'
 import type { PageServerLoad } from './$types'
@@ -10,16 +11,18 @@ export const load: PageServerLoad = async ({fetch}) => {
 		content = (await res.json()).content
 	}
 	res = await fetch("/api/qualifying")
-	if(res.ok){
-		exams = await res.json()
+	if(!res.ok){
+        throw error(res.status, 'ไม่สามารถอ่านข้อมูลการสอบได้');
 	}
+    exams = await res.json()
+
     const events:CalendarEvent[]=[]
     exams.forEach((e)=>{
         if(!e.start){
             e.date=""
             return
         }
-        e.date= dayjs(e.start).format("DD MMM BBBB")
+        e.date = e.start? dayjs(e.start).format("DD MMM BBBB"):""
         const {id,title,start,end,category_id} = e
         let backgroundColor =""
         switch (category_id) {