feat: improve filters and class pricing controls in dashboard

Add session class filter, distinct partial payment tag, richer notifications list, class discount/frontend toggles, and remove unused course discount column.

src/views/classes/ClassFormView.vue

@@ -40,6 +40,31 @@
           <InputNumber v-model="form.tuitionFee" :min="0" class="w-full text-sm" suffix=" تومان" />
         </div>
 
+        <div class="col-12 md:col-3 flex flex-column gap-2">
+          <label class="font-semibold text-sm">ظرفیت آزاد (نمایش در وب)</label>
+          <InputNumber v-model="form.freeSpots" :min="0" class="w-full text-sm" placeholder="دستی" />
+        </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">
+              <Checkbox v-model="form.hasDiscount" binary inputId="class-has-discount" />
+              <label for="class-has-discount" class="font-semibold text-sm cursor-pointer">تخفیف روی شهریه</label>
+            </div>
+            <div v-if="form.hasDiscount" class="grid mt-1">
+              <div class="col-12 md:col-4 flex flex-column gap-2">
+                <label class="font-semibold text-sm">مبلغ تخفیف (تومان)</label>
+                <InputNumber v-model="form.discount" :min="0" :max="form.tuitionFee || 0" class="w-full text-sm" suffix=" تومان" />
+              </div>
+              <div class="col-12 md:col-8 flex align-items-end">
+                <span class="font-semibold text-color text-sm">
+                  شهریه نهایی: {{ toPersianDigits(finalTuitionFee.toLocaleString()) }} تومان
+                </span>
+              </div>
+            </div>
+          </div>
+        </div>
+
         <div class="col-12 md:col-4 flex flex-column gap-2">
           <label class="font-semibold text-sm">تاریخ شروع</label>
           <DatePicker v-model="form.startDate" class="w-full text-sm" placeholder="1403/01/01" />
@@ -50,9 +75,19 @@
           <DatePicker v-model="form.endDate" class="w-full text-sm" placeholder="1403/03/01" />
         </div>
 
-        <div class="col-12 md:col-4 flex align-items-center gap-2 mt-4">
-          <InputSwitch v-model="form.isActive" />
-          <label class="font-semibold text-sm">کلاس فعال است</label>
+        <div class="col-12 md:col-4 flex flex-column gap-2">
+          <div class="flex align-items-center gap-2 mt-4">
+            <InputSwitch v-model="form.isActive" />
+            <label class="font-semibold text-sm">کلاس فعال است</label>
+          </div>
+        </div>
+
+        <div class="col-12 md:col-8 flex flex-column gap-1 mt-4">
+          <div class="flex align-items-center gap-2">
+            <InputSwitch v-model="form.showOnFrontend" />
+            <label class="font-semibold text-sm">نمایش در وب‌سایت</label>
+          </div>
+          <small class="text-muted text-xs">مستقل از «فعال بودن» — کلاس غیرفعال می‌تواند در سایت پنهان یا نمایش داده شود.</small>
         </div>
 
         <div class="col-12">
@@ -259,6 +294,10 @@ const form = reactive({
   professor: null,
   capacity: 20,
   tuitionFee: 0,
+  hasDiscount: false,
+  discount: 0,
+  freeSpots: null,
+  showOnFrontend: true,
   startDate: '',
   endDate: '',
   days: [],
@@ -269,6 +308,12 @@ const form = reactive({
 });
 const weekdays = WEEKDAYS;
 
+const finalTuitionFee = computed(() => {
+  const tuition = Number(form.tuitionFee) || 0;
+  if (!form.hasDiscount) return tuition;
+  return Math.max(0, tuition - (Number(form.discount) || 0));
+});
+
 const removeDialogMessage = computed(() => {
   const name = studentToRemove.value?.name;
   return name
@@ -346,6 +391,10 @@ const fetchData = async () => {
         professor: data.professor?._id || data.professor || null,
         capacity: data.capacity || 20,
         tuitionFee: data.tuitionFee || 0,
+        hasDiscount: Boolean(data.hasDiscount),
+        discount: data.discount || 0,
+        freeSpots: data.freeSpots ?? null,
+        showOnFrontend: data.showOnFrontend !== false,
         startDate: toJalaliDisplay(data.startDate),
         endDate: toJalaliDisplay(data.endDate),
         days: Array.isArray(data.days) ? data.days.map(Number).filter((day) => day >= 0 && day <= 6) : [],
@@ -385,6 +434,10 @@ const handleSubmit = async () => {
       professor: form.professor || undefined,
       capacity: form.capacity,
       tuitionFee: form.tuitionFee,
+      hasDiscount: form.hasDiscount,
+      discount: form.hasDiscount ? form.discount : 0,
+      freeSpots: form.freeSpots,
+      showOnFrontend: form.showOnFrontend,
       startDate: toGregorianIso(form.startDate),
       endDate: toGregorianIso(form.endDate),
       days: form.days || [],