main: fix codestyle etc.

main/models.py

+from datetime import timedelta
 from functools import cached_property
 
 from django.conf import settings
@@ -5,6 +6,7 @@ from django.core.paginator import Paginator
 from django.db import models
 from django.http import HttpResponseRedirect
 from django.shortcuts import render
+from django.utils import timezone
 from modelcluster.contrib.taggit import ClusterTaggableManager
 from modelcluster.fields import ParentalKey
 from taggit.models import TaggedItemBase
@@ -172,7 +174,7 @@ class MainHomePage(MenuMixin, ExtendedMetadataHomePageMixin, MetadataPageMixin,
 
 class MainWorkPage(ExtendedMetadataPageMixin, SubpageMixin, MetadataPageMixin, Page):
     perex = models.TextField()
-    timeline = StreamField(
+    timeline = StreamField(  # TODO delete
         [
             (
                 "article_list",
@@ -198,6 +200,14 @@ class MainWorkPage(ExtendedMetadataPageMixin, SubpageMixin, MetadataPageMixin, P
     class Meta:
         verbose_name = "Piráti pracují"
 
+    def get_context(self, request, *args, **kwargs):
+        ctx = super().get_context(request, args, kwargs)
+        last_month = timezone.now().today().replace(day=1) - timedelta(days=1)
+        first_day_of_last_month = last_month.replace(day=1)
+        article_qs = MainArticlePage.objects.filter(date__gt=first_day_of_last_month)
+        # article_data_list =
+        return ctx
+
 
 class MainArticleTag(TaggedItemBase):
     content_object = ParentalKey("main.MainArticlePage", on_delete=models.CASCADE)
@@ -229,6 +239,7 @@ class MainArticlePage(
 
     content_panels = ArticleMixin.content_panels + [
         FieldPanel("author_page"),
+        FieldPanel("region"),
         FieldPanel("tags"),
     ]