[LeonardNJU]

Problem

Delivery statuses stay stale when returning to webmail unless each shipping email is opened.

Changes

• Share one background poller between sidebar, periodic hooks and manual checks.
• On sidebar mount or tab focus, refresh active parcels no more than every 5 minutes.
• Add an accessible refresh icon at the upper-right of Deliveries content, next to the last lookup time.
• Manual refresh uses a 10-second minimum per parcel, respects provider Retry-After and the existing 20-parcel round limit.
• Keep the routine 30-minute poll and stop polling received, expired, stopped and delivered parcels.
• Add tests; update docs and package v1.2.0.

Verification

• 188 package tracking unit tests pass.
• Build and package checks pass (node scripts/build.mjs --check parcels and node scripts/check.mjs).

The host owns the collapsible sidebar section header, so the refresh icon sits directly under it on the right.

[LeonardNJU]

Follow-up (v1.2.1): moved the compact Refresh control and last checked time into the new sidebar-section-actions inline heading slot. This requires the companion Bulwark host change in webmail#1317, which keeps the collapsible heading and action button independent.

[rathlinus]

Merged with small changes: the last-check time uses api.i18n.formatTime when the host has it, so it follows the 12/24-hour setting (165207c). The row test now marks its parcels as just polled, because the refresh on opening the section could change their status before the assertion ran (b9d16c6).