Frontier UI 1.3.0 - keyless photos, units, routes & links, TextureCraft

Works out of the box with no SearXNG and no API keys, plus metric/imperial, reliable routes and links, and TextureCraft.

• Photos without SearXNG or keys: Wikipedia, Wikimedia Commons and Openverse (with credits). Optional: SearXNG, Brave, Google Programmable Search, Pexels, Unsplash. Keys stay server-side.
• Units: new units setting (auto follows the browser locale) with a per-user override. Weather and distances follow it.
• Routes on by default (walk, bike, drive, motorcycle), backup routers, and a clear reason when no route can be drawn.
• Map apps: Google Maps, Apple Maps, OpenStreetMap or GPX download (OsmAnd, Organic Maps, Garmin).
• Map links no longer hit ERR_BLOCKED_BY_RESPONSE: they open via Open WebUI when "iframe Sandbox Allow Same Origin" is on, directly on phones, otherwise the link is copied with a Copy / Try anyway panel.
• More reliable tool calls: spec is passed as a JSON object, stronger JSON repair, actionable errors. Literal "\n" text fixed.
• No WebGL? Maps show a static route sketch instead of breaking.
• TextureCraft (16th ArtCraft app): read, edit and convert GLB/glTF/FBX/USD/OBJ models.
• Regression and browser tests (Chromium, Firefox, WebKit) in tests/.

Upgrading: download frontier_ui.py below and replace your installed tool. If you use SearXNG, set searxng_url (now empty by default). temperature_unit is replaced by units.

Full details in CHANGELOG.md.