feat(calendar): enhance loading behavior and mobile layout for subscriptions

src/views/subscribe/FullCalendarView.vue

@@ -642,7 +642,7 @@ async function eventsHander(subscribe: Subscribe) {
 
 // 调用API查询所有订阅
 async function getSubscribes() {
-  if (!isLoaded.value) openProgressDialog()
+  if (!isLoaded.value && display.mdAndUp.value) openProgressDialog()
   try {
     // 订阅
     loading.value = true
@@ -767,6 +767,9 @@ onActivated(() => {
   </FullCalendar>
 
   <div v-else class="mobile-subscribe-calendar">
+    <LoadingBanner v-if="!isLoaded" class="mt-12" />
+
+    <template v-else>
       <section class="mobile-calendar-filter-card">
       <div class="mobile-calendar-filter-head">
         <div class="mobile-calendar-filter-copy">
@@ -894,6 +897,7 @@ onActivated(() => {
       <h2>{{ t('common.noData') }}</h2>
       <p>{{ t('calendar.noMatchingEvents') }}</p>
       </div>
+    </template>
   </div>
 </template>