Good changes

server-rs/src/data/travel_time.rs

@@ -8,11 +8,13 @@ use polars::lazy::frame::LazyFrame;
 use rustc_hash::{FxHashMap, FxHashSet};
 use tracing::info;
 
-/// Per-postcode travel time data: median and optional best-case (transit only).
-#[derive(Clone, Copy)]
+/// Per-postcode travel time data: median, optional best-case (transit only),
+/// and optional journey instructions (JSON leg array, transit only with --paths).
+#[derive(Clone)]
 pub struct TravelDataRow {
     pub minutes: i16,
     pub best_minutes: Option<i16>,
+    pub journey: Option<Arc<str>>,
 }
 
 /// Cached postcode → travel time data for a single destination file.
@@ -198,17 +200,26 @@ impl TravelTimeStore {
             .column("best_minutes")
             .ok()
             .map(|col| col.i16().expect("'best_minutes' is not i16"));
+        let journeys = df
+            .column("journey")
+            .ok()
+            .map(|col| col.str().expect("'journey' is not string"));
 
         let mut map = FxHashMap::default();
         map.reserve(df.height());
         for (i, (pc, min)) in postcodes.into_iter().zip(minutes.into_iter()).enumerate() {
             if let (Some(pc), Some(min)) = (pc, min) {
                 let best_min = best.as_ref().and_then(|b| b.get(i));
+                let journey = journeys
+                    .as_ref()
+                    .and_then(|j| j.get(i))
+                    .map(Arc::from);
                 map.insert(
                     pc.to_string(),
                     TravelDataRow {
                         minutes: min,
                         best_minutes: best_min,
+                        journey,
                     },
                 );
             }