Scheduled-result notifications: first lines, Open / Run again / Pause; a click opens

A run's own notification (run.notification, server dev) gives the body (the
result's first lines) and the actions with labels in the person's language;
they become the notification's action type. Every notification is
remembered by id (watch::Notes) so a click opens the chat or the task, and
Run again / Pause post /schedules/{id}/run|pause without the window. An
older server's run is said as before. Fixtures re-pinned at server dev
e0c2332, schedule.json added.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/ui/fixtures/SOURCE

@@ -1 +1 @@
-LLeMbas origin/dev (f7f2ff21d303d82e8c46fabed100311f300052c0) tests/fixtures/api_v2
+LLeMbas origin/dev (e0c2332d688f69e5a7efe157f8263eac02ac28d6) tests/fixtures/api_v2