refactor: split models into modules, remove template-based views, and clean up code style

- Split monolithic models.py into models/ package (customers, products, sales, payments, admin)
- Removed forms.py, all HTML templates, and associated template-based views
- Added api/ package with CatalogSaleView placeholder
- Updated all imports across project to use new model paths
- Removed obsolete tests (form, export, purchase, summary tests)
- Removed template-based URL patterns, kept only API endpoints
- Standardized string quotes (single to double) and reformatted code

tienda_ilusion/don_confiao/serializers.py

@@ -1,33 +1,51 @@
 from rest_framework import serializers
 
-from .models import Sale, SaleLine, Product, Customer, ReconciliationJar
+from .models.sales import Sale, SaleLine
+from .models.customers import Customer
+from .models.sales import Sale, SaleLine, Payment
+from .models.products import Product, ProductCategory
+from .models.payments import ReconciliationJar
 
 
 class SaleLineSerializer(serializers.ModelSerializer):
     class Meta:
         model = SaleLine
-        fields = ['id', 'sale', 'product', 'unit_price', 'quantity']
+        fields = ["id", "sale", "product", "unit_price", "quantity"]
 
 
 class SaleSerializer(serializers.ModelSerializer):
-    total = serializers.ReadOnlyField(source='get_total')
+    total = serializers.ReadOnlyField(source="get_total")
 
     class Meta:
         model = Sale
-        fields = ['id', 'customer', 'date', 'saleline_set',
-                  'total', 'payment_method', 'external_id']
+        fields = [
+            "id",
+            "customer",
+            "date",
+            "saleline_set",
+            "total",
+            "payment_method",
+            "external_id",
+        ]
 
 
 class ProductSerializer(serializers.ModelSerializer):
     class Meta:
         model = Product
-        fields = ['id', 'name', 'price', 'measuring_unit', 'categories', 'external_id']
+        fields = [
+            "id",
+            "name",
+            "price",
+            "measuring_unit",
+            "categories",
+            "external_id",
+        ]
 
 
 class CustomerSerializer(serializers.ModelSerializer):
     class Meta:
         model = Customer
-        fields = ['id', 'name', 'address', 'email', 'phone', 'external_id']
+        fields = ["id", "name", "address", "email", "phone", "external_id"]
 
 
 class ReconciliationJarSerializer(serializers.ModelSerializer):
@@ -36,13 +54,13 @@ class ReconciliationJarSerializer(serializers.ModelSerializer):
     class Meta:
         model = ReconciliationJar
         fields = [
-            'id',
-            'date_time',
-            'reconcilier',
-            'cash_taken',
-            'cash_discrepancy',
-            'total_cash_purchases',
-            'Sales',
+            "id",
+            "date_time",
+            "reconcilier",
+            "cash_taken",
+            "cash_discrepancy",
+            "total_cash_purchases",
+            "Sales",
         ]
 
 
@@ -52,8 +70,8 @@ class PaymentMethodSerializer(serializers.Serializer):
 
     def to_representation(self, instance):
         return {
-            'text': instance[1],
-            'value': instance[0],
+            "text": instance[1],
+            "value": instance[0],
         }
 
 
@@ -66,8 +84,8 @@ class SaleForRenconciliationSerializer(serializers.Serializer):
 
     def get_customer(self, sale):
         return {
-            'id': sale.customer.id,
-            'name': sale.customer.name,
+            "id": sale.customer.id,
+            "name": sale.customer.name,
         }
 
     def get_total(self, sale):
@@ -77,13 +95,13 @@ class SaleForRenconciliationSerializer(serializers.Serializer):
 class ListCustomerSerializer(serializers.ModelSerializer):
     class Meta:
         model = Customer
-        fields = ['id', 'name']
+        fields = ["id", "name"]
 
 
 class ListProductSerializer(serializers.ModelSerializer):
     class Meta:
         model = Product
-        fields = ['id', 'name']
+        fields = ["id", "name"]
 
 
 class SummarySaleLineSerializer(serializers.ModelSerializer):
@@ -91,13 +109,13 @@ class SummarySaleLineSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = SaleLine
-        fields = ['product', 'quantity', 'unit_price', 'description']
+        fields = ["product", "quantity", "unit_price", "description"]
 
 
 class SaleSummarySerializer(serializers.ModelSerializer):
     customer = ListCustomerSerializer()
-    lines = SummarySaleLineSerializer(many=True, source='saleline_set')
+    lines = SummarySaleLineSerializer(many=True, source="saleline_set")
 
     class Meta:
         model = Sale
-        fields = ['id', 'date', 'customer', 'payment_method', 'lines']
+        fields = ["id", "date", "customer", "payment_method", "lines"]