fix undefined

src/features/library/inspect/MarkHeader.vue

@@ -8,7 +8,11 @@
     v-if="store.setting"
   >
     <div>
-      {{ store.setting.subject.code + "-" + store.setting.subject.name }}
+      {{
+        `${store.setting.subject.code ?? ""}-${
+          store.setting.subject.name ?? ""
+        }`
+      }}
     </div>
     <div class="tw-flex tw-gap-1">
       <div>

src/features/student/inspect/MarkHeader.vue

@@ -1,10 +1,18 @@
 <template>
   <div
-    class="tw-flex tw-gap-4 tw-justify-between tw-items-center header-container tw-px-1"
+    class="
+      tw-flex tw-gap-4 tw-justify-between tw-items-center
+      header-container
+      tw-px-1
+    "
     v-if="store.setting"
   >
     <div>
-      {{ store.setting.subject.code + "-" + store.setting.subject.name }}
+      {{
+        `${store.setting.subject.code ?? ""}-${
+          store.setting.subject.name ?? ""
+        }`
+      }}
     </div>
     <div class="tw-flex tw-gap-1">
       <div>