A field can be a place, and a question can be about one

`type: location` puts a pin on a map and stores {lat, lon, zoom}; a
record that holds one renders as a still, on a desk and in any
resource card. `place:` on a question is the counterpart to `event:`:
event makes a page an occasion with a time, place makes it somewhere,
shows the map under the question, and opens any location field on the
page there instead of on the globe.

Every tile and every still is fetched by portal and served from this
origin (src/maps.rs, MapLibre vendored in public/), so a page with a
map on it still talks to nobody but us: no third-party request, no
consent banner, and the token never leaves the server. MAPBOX_TOKEN
unset turns the whole thing off, the way GARAGE_* does for uploads.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/main.rs

@@ -151,6 +151,10 @@ async fn main() -> anyhow::Result<()> {
     let favicon_dark_path = format!("{}/favicon-dark.svg", leptos_options.site_root);
     let wordmark_path = format!("{}/wordmark.svg", leptos_options.site_root);
     let swiper_path = format!("{}/swiper-element-bundle.min.js", leptos_options.site_root);
+    // Vendored, not loaded from a CDN: a map must not be the one thing
+    // on the page that phones a stranger.
+    let maplibre_js = format!("{}/maplibre-gl.js", leptos_options.site_root);
+    let maplibre_css = format!("{}/maplibre-gl.css", leptos_options.site_root);
     let fonts_dir = format!("{}/fonts", leptos_options.site_root);
 
     let app = Router::new()
@@ -169,6 +173,12 @@ async fn main() -> anyhow::Result<()> {
         // Content-shipped assets (hero module etc.), same-origin.
         .route("/site/{*path}", get(content::site_asset_handler))
         .route("/automation/kv/{bucket}", get(content::automation_kv_handler))
+        // Maps, proxied: the browser asks this origin for every tile
+        // and every still, so nothing third-party loads in a page and
+        // the token stays here (see maps.rs).
+        .route("/map/style.json", get(portal::maps::style))
+        .route("/map/tiles/{z}/{x}/{y}", get(portal::maps::tile))
+        .route("/map/still/{place}/{size}", get(portal::maps::still))
         // no-cache = "revalidate before reuse", not "don't cache":
         // pkg files keep the same names across releases (portal.js,
         // portal.wasm), and without this browsers heuristically cache
@@ -193,6 +203,8 @@ async fn main() -> anyhow::Result<()> {
             "/swiper-element-bundle.min.js",
             ServeFile::new(swiper_path),
         )
+        .route_service("/maplibre-gl.js", ServeFile::new(maplibre_js))
+        .route_service("/maplibre-gl.css", ServeFile::new(maplibre_css))
         .leptos_routes_with_context(
             &state,
             routes,