Features: 1) Add media property in ProductAdmin to include custom Select2 JS and CSS integration for improved admin interface;

Fixes: 1) Correct list_filter fields for brand and category in ProductAdmin to use proper lookup names;

Extra: 1) Add missing import for forms and get_select2_language from

core/admin.py

@@ -3,9 +3,11 @@ from contextlib import suppress
 from constance.admin import Config
 from constance.admin import ConstanceAdmin as BaseConstanceAdmin
 from dalf.admin import DALFRelatedFieldAjax, DALFRelatedOnlyField
+from django import forms
 from django.apps import apps
 from django.contrib import admin
 from django.contrib.admin import ModelAdmin, TabularInline
+from django.contrib.admin.widgets import get_select2_language
 from django.contrib.gis.admin import GISModelAdmin
 from django.db.models import Model
 from django.utils.translation import gettext_lazy as _
@@ -240,8 +242,8 @@ class ProductAdmin(FieldsetsMixin, BasicModelAdmin):
     list_filter = (
         "is_active",
         "is_digital",
-        ("brand__name", DALFRelatedFieldAjax),
-        ("category__name", DALFRelatedFieldAjax),
+        ("brand", DALFRelatedFieldAjax),
+        ("category", DALFRelatedFieldAjax),
         ("tags", DALFRelatedOnlyField),
         ("stocks__vendor", DALFRelatedOnlyField),
         "created",
@@ -262,6 +264,27 @@ class ProductAdmin(FieldsetsMixin, BasicModelAdmin):
     general_fields = ["is_active", "name", "partnumber", "is_digital"]
     relation_fields = ["category", "brand", "tags"]
 
+    @property
+    def media(self):
+        i18n_name = get_select2_language()
+        i18n_file = (f"admin/js/vendor/select2/i18n/{i18n_name}.js",) if i18n_name else ()
+        return super().media + forms.Media(
+            js=(
+                "admin/js/vendor/jquery/jquery.min.js",
+                "admin/js/vendor/select2/select2.full.min.js",
+                *i18n_file,
+                "admin/js/jquery.init.js",
+                "admin/js/django_admin_list_filter.js",
+            ),
+            css={
+                "screen": (
+                    "admin/css/vendor/select2/select2.min.css",
+                    "admin/css/autocomplete.css",
+                    "admin/css/django_admin_list_filter.css",
+                ),
+            },
+        )
+
 
 @admin.register(ProductTag)
 class ProductTagAdmin(FieldsetsMixin, BasicModelAdmin):