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## Summary Closes #11. Mirrors ai_ml_operations/monica_site#15. - Direct-mail compose can target the postcard mailing list **or** find and select one or two USPS carrier routes by ZIP (optional radius). - Estimated cost is shown per route and for the selection (PCM design pricing, else `PCM_POSTCARD_PRICE_*` fallback). - Selected routes order through PCM `POST /order/postcard/with-list-count` — occupant addresses are not imported into Contacts. - Not official EDDM postage; PCM FirstClass/Standard purchased occupant lists on carrier routes. ## Test plan - [ ] Campaign compose: mailing-list audience still quotes list size × per-piece cost. - [ ] Switch to USPS carrier routes, search a ZIP, pick 1–2 routes, confirm household count + estimated cost. - [ ] Saving without a selection is rejected; saving with a quote creates one contact-less Message and shows the route panel on the report. - [ ] Send places `/order/postcard/with-list-count` (not per-recipient `/order/postcard`). - [ ] `uv run python manage.py test directmail.tests.CarrierRoutePostcardTests directmail.tests.PostcardDesignPickTests` Reviewed-on: #12