Add numberOfSessions to class form and fix attendance navigation.

Editable session count on the class edit page and corrected redirects back to the attendance list route.

src/views/classes/ClassFormView.vue

@@ -45,6 +45,11 @@
           <InputNumber v-model="form.freeSpots" :min="0" class="w-full text-sm" placeholder="دستی" />
         </div>
 
+        <div class="col-12 md:col-3 flex flex-column gap-2">
+          <label class="font-semibold text-sm">تعداد جلسات</label>
+          <InputNumber v-model="form.numberOfSessions" :min="1" class="w-full text-sm" placeholder="مثلا ۱۲" />
+        </div>
+
         <div class="col-12">
           <div class="flex flex-column gap-2 p-3 border-1 border-color border-round">
             <div class="flex align-items-center gap-2">
@@ -303,6 +308,7 @@ const form = reactive({
   days: [],
   startTime: '',
   endTime: '',
+  numberOfSessions: null,
   isActive: true,
   adminNotes: []
 });
@@ -359,6 +365,9 @@ const applyCourseDefaults = (course) => {
   }
   if (course.capacity) form.capacity = course.capacity;
   if (course.price != null) form.tuitionFee = course.price;
+  if (form.numberOfSessions == null && course.sectionCount) {
+    form.numberOfSessions = course.sectionCount;
+  }
   if (course.sectionCount) defaultSessionCount.value = course.sectionCount;
 };
 
@@ -400,11 +409,16 @@ const fetchData = async () => {
         days: Array.isArray(data.days) ? data.days.map(Number).filter((day) => day >= 0 && day <= 6) : [],
         startTime: data.startTime || '',
         endTime: data.endTime || '',
+        numberOfSessions: data.numberOfSessions ?? null,
         isActive: data.isActive !== false,
         adminNotes: Array.isArray(data.adminNotes) ? [...data.adminNotes] : []
       });
       students.value = data.students || [];
-      if (data.course?.sectionCount) defaultSessionCount.value = data.course.sectionCount;
+      if (data.numberOfSessions) {
+        defaultSessionCount.value = data.numberOfSessions;
+      } else if (data.course?.sectionCount) {
+        defaultSessionCount.value = data.course.sectionCount;
+      }
     } else if (queryCourseId) {
       const linked = courses.value.find((c) => String(c._id) === String(queryCourseId));
       if (linked) {
@@ -443,6 +457,7 @@ const handleSubmit = async () => {
       days: form.days || [],
       startTime: form.startTime || '',
       endTime: form.endTime || '',
+      numberOfSessions: form.numberOfSessions,
       isActive: form.isActive,
       adminNotes: (form.adminNotes || []).map((n) => String(n).trim()).filter(Boolean)
     };