Persist official climb attempts with climbs pages

Record one attempt row per (ride, climb, occurrence) when a ride detail
loads, snapshotting distance, elevation gain, slope, cotacol and attempt
timestamps; a climbs-backfill CLI command seeds all existing rides.

New /climbs list page aggregates attempts (medians computed in Go, best
time as min duration) with sortable columns, and /climbs/{id} shows the
median scalar stats, a median normalized elevation profile (50 steps
over each attempt's own length), the full-precision recorded route of
the median-distance attempt on an OSM map, and every attempt with time
at second precision.

1 files changed, 65 insertions, 0 deletions

diff --git a/web/frontend/climb-map.ts b/web/frontend/climb-map.ts
new file mode 100644
index 0000000..909614d
--- /dev/null
+++ b/web/frontend/climb-map.ts
@@ -0,0 +1,65 @@
+import type { Map as LeafletMap } from "leaflet";
+
+interface ClimbMapPayload {
+  distanceKm: number;
+  elevations: number[];
+  route?: [number, number][];
+}
+
+interface ClimbMapEndpoints {
+  start: [number, number];
+  end: [number, number];
+  name: string;
+}
+
+const mountClimbMap = (): void => {
+  const element = document.getElementById("climb-map");
+  const endpointsElement = document.getElementById("climb-endpoints");
+  const profileElement = document.getElementById("climb-profile-data");
+  const leaflet = window.L;
+  if (!element || !endpointsElement || !profileElement || !leaflet) return;
+  const endpoints = JSON.parse(endpointsElement.textContent ?? "null") as ClimbMapEndpoints | null;
+  const profile = JSON.parse(profileElement.textContent ?? "null") as ClimbMapPayload | null;
+  if (!endpoints) return;
+  const route = (profile?.route ?? []).map(([lon, lat]) => [lat, lon] as [number, number]);
+  const line: [number, number][] = route.length > 1 ? route : [endpoints.start, endpoints.end];
+
+  const map: LeafletMap = leaflet.map(element);
+  leaflet
+    .tileLayer("https://tile.openstreetmap.org/{z}/{x}/{y}.png", {
+      maxZoom: 19,
+      attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
+    })
+    .addTo(map);
+
+  const startIcon = leaflet.divIcon({
+    className: "ride-map-climb-start-icon",
+    html: '<svg viewBox="0 0 24 24" aria-hidden="true"><circle cx="12" cy="12" r="6" fill="currentColor"/></svg>',
+    iconSize: [26, 26],
+    iconAnchor: [13, 13],
+  });
+  const endIcon = leaflet.divIcon({
+    className: "ride-map-climb-end-icon",
+    html: '<svg viewBox="0 0 24 24" aria-hidden="true"><path d="M5 3v18" stroke="currentColor" stroke-width="2"/><path d="M6 4h13v8H6Z" fill="currentColor"/><path d="M6 4h3.25v4H6ZM12.5 4h3.25v4H12.5ZM9.25 8h3.25v4H9.25ZM15.75 8H19v4h-3.25Z" fill="var(--color-forest)"/></svg>',
+    iconSize: [26, 26],
+    iconAnchor: [13, 13],
+  });
+  leaflet
+    .polyline(line, {
+      color: "var(--color-climb-route)",
+      weight: 4,
+      opacity: 0.9,
+    })
+    .addTo(map);
+  leaflet
+    .marker(endpoints.start, { icon: startIcon, alt: `${endpoints.name} start` })
+    .addTo(map)
+    .bindTooltip("Start");
+  leaflet
+    .marker(endpoints.end, { icon: endIcon, alt: `${endpoints.name} end` })
+    .addTo(map)
+    .bindTooltip("End");
+  map.fitBounds(leaflet.latLngBounds(line), { padding: [40, 40], maxZoom: 16 });
+};
+
+mountClimbMap();