Major refactor of commerce and Stripe integration

Refactored commerce models to support refunds, invoices, and improved carrier/payment logic. Added new serializers and viewsets for products, categories, images, discount codes, and refunds. Introduced Stripe client integration and removed legacy Stripe admin/model code. Updated Dockerfile for PDF generation dependencies. Removed obsolete migration files and updated configuration app initialization. Added invoice template and tasks for order cleanup.

backend/vontor_cz/settings.py

@@ -51,12 +51,13 @@ DATETIME_INPUT_FORMATS = [
     "%Y-%m-%dT%H:%M:%S",     # '2025-07-25T14:30:59'
 ]
 
-LANGUAGE_CODE = 'cs'
+# -------------------- LOKALIZACE -------------------------
 
-TIME_ZONE = 'Europe/Prague'
+LANGUAGE_CODE = os.getenv("LANGUAGE_CODE", "cs")
+TIME_ZONE = os.getenv("TIME_ZONE", "Europe/Prague")
 
 USE_I18N = True
-
+USE_L10N = True
 USE_TZ = True
 
 
@@ -313,6 +314,10 @@ REST_FRAMEWORK = {
 	'DEFAULT_SCHEMA_CLASS': 'drf_spectacular.openapi.AutoSchema',
 	'DEFAULT_FILTER_BACKENDS': ['django_filters.rest_framework.DjangoFilterBackend'],
 
+    # Enable default pagination so custom list actions (e.g., /orders/detail) paginate
+    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
+    'PAGE_SIZE': 20,
+
 	'DEFAULT_THROTTLE_RATES': {
 		'anon': '100/hour',   # unauthenticated
 		'user': '2000/hour',  # authenticated
@@ -326,7 +331,8 @@ REST_FRAMEWORK = {
 MY_CREATED_APPS = [
     'account',
     'commerce',
-	
+	'configuration',
+
     'social.chat',
 
     'thirdparty.downloader',