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/attendances/AttendanceEntryView.vue

@@ -5,7 +5,7 @@
       :title="$t('attendances.title')"
       :subtitle="`دوره: ${session.course?.title || '-'} | کلاس: ${session.class?.name || '-'} | تاریخ: ${formatJalali(session.day)} (${session.startTime || ''} تا ${session.endTime || ''})`"
     >
-      <Button label="بازگشت" icon="pi pi-arrow-left" text severity="secondary" @click="$router.push('/attendances')" />
+      <Button label="بازگشت" icon="pi pi-arrow-left" text severity="secondary" @click="$router.push('/attendance')" />
     </PageHeader>
 
     <div class="surface-card p-4 sm:p-5 border-round border-1 border-color shadow-sm mb-3" v-if="session.note">
@@ -56,7 +56,7 @@
       </DataTable>
 
       <div class="flex justify-content-end gap-2 mt-4 pt-3 border-top-1 border-color">
-        <Button label="انصراف" text severity="secondary" @click="$router.push('/attendances')" />
+        <Button label="انصراف" text severity="secondary" @click="$router.push('/attendance')" />
         <Button
           :label="$t('attendances.submitAttendance')"
           icon="pi pi-save"
@@ -147,7 +147,7 @@ const handleSubmit = async () => {
     }));
     await attendanceApi.recordSessionAttendance(sessionId, payloadList);
     showSuccess('حضور و غیاب جلسه با موفقیت ثبت شد');
-    router.push('/attendances');
+    router.push('/attendance');
   } catch (err) {
     showError(err);
   } finally {