feat(dashboard): add professor user selection, loading overlays on all edit/detail views, and SMS bypass management

src/views/sessions/SessionFormView.vue

@@ -8,7 +8,8 @@
       <Button label="انصراف" text severity="secondary" @click="$router.push('/sessions')" />
     </PageHeader>
 
-    <div class="surface-card p-4 sm:p-5 border-round border-1 border-color shadow-sm">
+    <div class="surface-card p-4 sm:p-5 border-round border-1 border-color shadow-sm relative overflow-hidden">
+      <LoadingOverlay :loading="isFetching" message="در حال دریافت اطلاعات جلسه..." />
       <form @submit.prevent="handleSubmit" class="grid">
         <div class="col-12 md:col-6 flex flex-column gap-2">
           <label class="font-semibold text-sm">انتخاب دوره *</label>
@@ -102,6 +103,7 @@ import { professorApi } from '@/api/professorApi';
 import { usePersianDate } from '@/composables/usePersianDate';
 import { useToast } from '@/composables/useToast';
 import PageHeader from '@/components/common/PageHeader.vue';
+import LoadingOverlay from '@/components/common/LoadingOverlay.vue';
 import AdminNotesField from '@/components/common/AdminNotesField.vue';
 import InputText from 'primevue/inputtext';
 import Textarea from 'primevue/textarea';
@@ -117,6 +119,7 @@ const { toLatinDigits, toJalaliPickerValue, toGregorianIso, getTodayJalali } = u
 const sessionId = route.params.id;
 const isEditMode = computed(() => !!sessionId);
 
+const isFetching = ref(false);
 const isSubmitting = ref(false);
 const courses = ref([]);
 const classes = ref([]);
@@ -163,6 +166,7 @@ const onCourseChange = async () => {
 };
 
 const fetchData = async () => {
+  isFetching.value = true;
   try {
     const [cResult, pResult] = await Promise.allSettled([
       courseApi.getAll({ limit: 100 }),
@@ -205,6 +209,8 @@ const fetchData = async () => {
     }
   } catch (err) {
     showError(err);
+  } finally {
+    isFetching.value = false;
   }
 };