Add ability to re-import individual ERROR/SKIPPED orders directly from
the order detail modal. Downloads narrow date range from GoMag API,
finds the specific order, and re-runs import_single_order().
Backend:
- New retry_service.py with retry_single_order() — downloads order_date
±1 day from GoMag, finds order by number, imports via import_service
- Guard: blocks retry during active sync (_sync_lock check)
- POST /api/orders/{order_number}/retry endpoint
Frontend:
- "Reimporta" button in modal footer (visible only for ERROR/SKIPPED)
- Spinner during retry, success/error feedback with auto-refresh
Cache-bust: shared.js?v=18
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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