Fix OTP/SMS, ledger accounting, order tracking, and add reviews app

- Add MessageTemplate.runtime_field_labels so mobile's per-field
  execution-time labels are actually persisted (were silently dropped)
- Fix AdvanceOrderStageView reading the wrong extra-input key, and be
  honest about SMS send failures instead of always claiming success
- Add admin gift-gem SMS notification via Kavenegar
- Post real double-entry Transactions for plain (non-invoice) ledger
  entries so trial balance, the معین screen, and CSV/XLSX exports
  actually include everyday income/expense entries; backfill existing
  historical entries via data migration
- Rewrite CSV ledger export to produce an actual دفتر معین structure
  (per-account running balance) instead of a flat row dump
- Add invoice percent/promotional discounts, tax presets, ledger
  discount-percent handling, product SKU/category/expiry fields, and
  manual ledger-book archiving (replacing auto-archive on new book)
- Add reviews app (models, API, admin) for the comments/reviews feature
- Update tests for the above; fix two stale assertions left over from
  earlier work in this branch (معین sheet name, book auto-close)

apps/bizapps/api/serializers.py

@@ -81,6 +81,9 @@ class LedgerEntrySerializer(serializers.ModelSerializer):
     category_display = serializers.CharField(source="get_category_display", read_only=True)
     account_name = serializers.CharField(source="account.name", read_only=True, default="")
     account_code = serializers.CharField(source="account.code", read_only=True, default="")
+    discount_amount = serializers.FloatField(read_only=True)
+    tax_amount = serializers.FloatField(read_only=True)
+    computed_amount = serializers.FloatField(read_only=True)
 
     class Meta:
         model = LedgerEntry
@@ -88,6 +91,8 @@ class LedgerEntrySerializer(serializers.ModelSerializer):
             "id", "entry_type", "title", "amount", "category", "category_display",
             "entry_date", "note", "total_amount", "counterparty_name", "counterparty_phone",
             "linked_invoice", "account_name", "account_code",
+            "base_amount", "discount_percent", "tax_percent",
+            "discount_amount", "tax_amount", "computed_amount",
             "is_debt", "professional_type", "paid_amount", "remaining_amount",
             "installments", "updated_at",
         ]
@@ -112,7 +117,8 @@ class ProductSerializer(serializers.ModelSerializer):
         fields = [
             "id", "name", "sku", "category", "unit", "quantity",
             "unit_price", "purchase_price", "total_purchase_value",
-            "low_stock_threshold", "is_low_stock", "notes", "updated_at",
+            "low_stock_threshold", "is_low_stock", "is_active",
+            "production_date", "expiry_date", "notes", "updated_at",
         ]
         read_only_fields = ["total_purchase_value", "is_low_stock", "updated_at"]
 
@@ -153,7 +159,9 @@ class InvoiceSerializer(serializers.ModelSerializer):
             "id", "invoice_number", "invoice_date", "customer",
             "buyer_name", "buyer_phone", "buyer_address",
             "seller_name", "seller_phone", "seller_address",
-            "total_amount", "discount_amount", "tax_lines", "final_amount",
+            "total_amount", "discount_percent", "discount_amount",
+            "extra_discount_label", "extra_discount_percent", "extra_discount_amount",
+            "tax_lines", "final_amount",
             "payment_type", "payment_type_display",
             "payment_status", "payment_status_display",
             "order_status", "order_status_display",
@@ -188,7 +196,17 @@ class CreateInvoiceSerializer(serializers.Serializer):
     seller_name = serializers.CharField(max_length=150, required=False, allow_blank=True, default="")
     seller_phone = serializers.CharField(max_length=20, required=False, allow_blank=True, default="")
     seller_address = serializers.CharField(max_length=255, required=False, allow_blank=True, default="")
+    # درصد اولویت دارد: اگر discount_percent مثبت باشد، discount_amount از
+    # روی همان محاسبه می‌شود (هم‌الگو با تخفیفِ درصدیِ هر قلم فاکتور)؛
+    # discount_amount خامْ فقط برای سازگاری با کلاینت‌های قدیمی نگه داشته
+    # شده — اگر درصد صفر باشد همان مقدار مستقیم استفاده می‌شود.
+    discount_percent = serializers.FloatField(required=False, default=0, min_value=0, max_value=100)
     discount_amount = serializers.FloatField(required=False, default=0, min_value=0)
+    # تخفیفِ ویژه/دوره‌ای — جدا از تخفیفِ بالا، روی مبلغِ بعد از آن اعمال
+    # می‌شود. یا با درصد یا با مبلغِ ثابت پر می‌شود.
+    extra_discount_label = serializers.CharField(max_length=100, required=False, allow_blank=True, default="")
+    extra_discount_percent = serializers.FloatField(required=False, default=0, min_value=0, max_value=100)
+    extra_discount_amount = serializers.FloatField(required=False, default=0, min_value=0)
     tax_lines = serializers.ListField(child=serializers.DictField(), required=False, default=list)
     payment_type = serializers.ChoiceField(choices=Invoice.PaymentType.choices, required=False)
     shipping_method = serializers.ChoiceField(choices=Invoice.ShippingMethod.choices, required=False)