feat: replace email flows with in-app notifications

Add recipient notification detail and filtering, a queued admin composer, and contextual automatic titles. Retire email delivery, obsolete auth routes, newsletter data, and related templates and settings.

apps/communications/resources.py

@@ -3,7 +3,7 @@ from django.contrib.auth import get_user_model
 from import_export import resources, fields
 from import_export.widgets import ForeignKeyWidget
 
-from apps.communications.models import Announcement, NewsletterSubscription, PushNotificationDevice
+from apps.communications.models import Announcement, PushNotificationDevice
 
 User = get_user_model()
 
@@ -19,24 +19,7 @@ class AnnouncementResource(resources.ModelResource):
         model = Announcement
         fields = (
             'id', 'title', 'content', 'announcement_type', 'priority',
-            'author', 'is_published', 'publish_date', 'send_email', 'send_push',
-            'target_audience', 'created_at', 'updated_at'
-        )
-        export_order = fields
-
-
-class NewsletterSubscriptionResource(resources.ModelResource):
-    user = fields.Field(
-        column_name='user',
-        attribute='user',
-        widget=ForeignKeyWidget(User, 'username')
-    )
-
-    class Meta:
-        model = NewsletterSubscription
-        fields = (
-            'id', 'email', 'user', 'is_active', 'subscribed_categories',
-            'confirmed_at', 'created_at', 'updated_at'
+            'author', 'is_published', 'publish_date', 'created_at', 'updated_at'
         )
         export_order = fields