c2b1854df6
The "Send Test Email" button on the Update Notifications settings page called sendUpdateNotificationNow() — which bailed out with "No updates available" when the instance was already on the latest version. Admins on a current install had no way to verify their SMTP / recipient list was working until an update happened to be pending. Reported in #418 by @Rekoo-PS. Changes: - Add migration 087: insert a dedicated `version_update_test` email template (EN + DE, matching the existing version_update_available convention) with copy that reads as a config-check rather than as a real update notice. Subject prefixed with [TEST] so it's unambiguous in the inbox. Variables: current_version, channel, recipient_email. - Replace sendUpdateNotificationNow() with sendTestUpdateNotification() in updateNotificationService.js. The new path: - Always sends — no updateAvailable bail-out. - Uses the version_update_test template. - Falls back gracefully if checkForUpdates fails (so a transient GitHub API hiccup doesn't block a config-check email). - Does NOT update last_notified_version — that field stays owned by the real-update path so a test send doesn't shadow a future genuine notification for the same version. - Wire /admin/system/updates/notifications/send to the renamed function. No frontend change needed (the button already calls this endpoint). Verified locally with the dev mailhog: clicking Send Test Email on a 3.42.3-beta.0 instance (which has no pending update) delivers 4 emails to all admin recipients with subject "[TEST] PicPeak Update Notification — configuration check" and body interpolated correctly. Returns {success: true, successCount: 4, ...} — previously would have returned {success: false, message: "No updates available"}.