Frontier UI 1.3.1 - photo fallbacks, self-starting Craft bridge, Apple Silicon

Photos for long queries, a self-starting Craft bridge, Apple Silicon. Thanks to @ondrejch for PR #1 and to u/PersonalCitron2328 for the Mac report.

• Photos for long or descriptive queries (PR #1 by @ondrejch): searches like "brown tabby Maine Coon cat" no longer come back empty - when a query finds fewer than three photos it tops up from shorter, more specific searches. Photos also load eagerly inside Open WebUI's sandbox.
• Follow-up: the fallback searches run in parallel within the photo time budget and never cost the photos the original query found; place cards (restaurants, shops) never get a photo of just the neighbourhood.
• Craft bridge starts with the container (s6 service in server/craft-apps/docker-compose.yml) - no more docker exec ... bridge.py after restarts.
• Apple Silicon / ARM hosts: platform: linux/amd64 for the Craft container.
• Maps: route lines come back after a basemap fallback or theme switch.
• Craft bridge /cli endpoint for agents; new regression tests.

Upgrading: download frontier_ui.py below and replace your installed tool. Craft desktop users: take the new server/craft-apps/docker-compose.yml (and server/craft-bridge/bridge.py), then docker compose up -d.

Full details in CHANGELOG.md.