feat(notifications): add translation activity summary notification (#19517)

This allows users to follow activity without being overwhelmed with all
the details.

Fixes #13071

Author: nijel

docs/changes.rst

@@ -7,6 +7,7 @@ Weblate 2026.5
 
 * Added :ref:`file_format_params` for :ref:`markdown`, including ``line_max_length``, ``md_extract_code_blocks``, ``md_extract_frontmatter``, and ``md_no_placeholders``.
 * Added :ref:`mdx` support for translating Markdown text while preserving JSX syntax.
+* Added a digest-only translation activity summary notification, see :ref:`notifications`.
 * :ref:`CSV <csv>` and :ref:`XLSX <xlsx>` downloads in :ref:`download` now export plural strings as separate plural-form rows that can be imported back.
 * :ref:`file_format_params` now include ``po_set_language_team``, ``po_set_last_translator``, ``po_set_x_generator``, and ``po_report_msgid_bugs_to`` to control whether Weblate updates the ``Language-Team``, ``Last-Translator``, ``X-Generator``, and ``Report-Msgid-Bugs-To`` headers in Gettext PO and POT files.
 * Added a :ref:`backup-management-command` to run configured backup services synchronously.

docs/specs/openapi.yaml

@@ -170,6 +170,10 @@ example about new strings to translate), while some trigger at component level
 (for example merge errors). These two groups of notifications are visually
 separated in the settings.
 
+The :guilabel:`Translation activity summary` notification is digest-only and
+summarizes added, updated, translated, approved, needs editing, and unfinished
+strings.
+
 You can toggle notifications for watched projects and administered projects and it
 can be further tweaked (or muted) per project and component. Visit the component
 overview page and select appropriate choice from the :guilabel:`Watching` menu.

docs/user/profile.rst

@@ -34,7 +34,7 @@
     (
         NotificationScope.SCOPE_WATCHED,
         NotificationFrequency.FREQ_WEEKLY,
-        "NewStringNotificaton",
+        "TranslationActivitySummaryNotification",
     ),
     (
         NotificationScope.SCOPE_ADMIN,

weblate/accounts/data.py

@@ -0,0 +1,66 @@
+# Copyright © Michal Čihař <michal@weblate.org>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# Generated by Django 6.0.5 on 2026-05-12 13:58
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("accounts", "0028_alter_profile_codesite_alter_profile_fediverse_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="subscription",
+            name="notification",
+            field=models.CharField(
+                choices=[
+                    (
+                        "RepositoryNotification",
+                        "Operation was performed in the repository",
+                    ),
+                    ("LockNotification", "Component was locked or unlocked"),
+                    ("LicenseNotification", "License was changed"),
+                    ("ParseErrorNotification", "Parse error occurred"),
+                    ("NewStringNotificaton", "String is available for translation"),
+                    (
+                        "TranslationActivitySummaryNotification",
+                        "Translation activity summary",
+                    ),
+                    (
+                        "NewContributorNotificaton",
+                        "Contributor made their first translation",
+                    ),
+                    ("NewSuggestionNotificaton", "Suggestion was added"),
+                    ("LanguageTranslatedNotificaton", "Language was translated"),
+                    ("ComponentTranslatedNotificaton", "Component was translated"),
+                    ("NewCommentNotificaton", "Comment was added"),
+                    ("MentionCommentNotificaton", "You were mentioned in a comment"),
+                    (
+                        "LastAuthorCommentNotificaton",
+                        "Your translation received a comment",
+                    ),
+                    ("TranslatedStringNotificaton", "String was edited by user"),
+                    ("ApprovedStringNotificaton", "String was approved"),
+                    ("ChangedStringNotificaton", "String was changed"),
+                    (
+                        "NewTranslationNotificaton",
+                        "New language was added or requested",
+                    ),
+                    (
+                        "NewComponentNotificaton",
+                        "New translation component was created",
+                    ),
+                    ("NewAnnouncementNotificaton", "Announcement was published"),
+                    ("NewAlertNotificaton", "New alert emerged in a component"),
+                    ("MergeFailureNotification", "Repository operation failed"),
+                    ("PendingSuggestionsNotification", "Pending suggestions exist"),
+                    ("ToDoStringsNotification", "Unfinished strings exist"),
+                ],
+                max_length=100,
+            ),
+        ),
+    ]