feat(map): draw multi-leg flights as connected legs with a marker per airport

Both the Leaflet and Mapbox overlays now render a flight over all its waypoints:
one great-circle arc per leg and a marker at every airport, with the label
showing the full route and the summed distance. A single-leg flight is unchanged.

Also drops the floating stats badge that was drawn on transport arcs.

client/src/components/Map/ReservationOverlay.tsx

@@ -158,6 +158,7 @@ interface TransportItem {
   res: Reservation
   from: ReservationEndpoint
   to: ReservationEndpoint
+  waypoints: ReservationEndpoint[]
   type: TransportType
   arcs: [number, number][][]
   primaryArc: [number, number][]
@@ -353,15 +354,29 @@ export default function ReservationOverlay({ reservations, showConnections, show
     const out: TransportItem[] = []
     for (const r of reservations) {
       if (!TRANSPORT_TYPES.includes(r.type as TransportType)) continue
-      const eps = r.endpoints || []
-      const from = eps.find(e => e.role === 'from')
-      const to = eps.find(e => e.role === 'to')
-      if (!from || !to) continue
+      // Ordered waypoints (from · stops · to). A single-leg booking has exactly two,
+      // so the arc + markers below are byte-identical to before for it.
+      const waypoints = (r.endpoints || [])
+        .filter(e => e.role === 'from' || e.role === 'to' || e.role === 'stop')
+        .slice()
+        .sort((a, b) => (a.sequence ?? 0) - (b.sequence ?? 0))
+      if (waypoints.length < 2) continue
+      const from = waypoints[0]
+      const to = waypoints[waypoints.length - 1]
       const type = r.type as TransportType
       const isGeo = TYPE_META[type].geodesic
-      const arcs = isGeo
-        ? splitAntimeridian(greatCircle([from.lat, from.lng], [to.lat, to.lng]))
-        : [[[from.lat, from.lng], [to.lat, to.lng]] as [number, number][]]
+      // One arc per leg (between consecutive waypoints), concatenated.
+      const arcs: [number, number][][] = []
+      let distanceKm = 0
+      for (let i = 0; i < waypoints.length - 1; i++) {
+        const a = waypoints[i]
+        const b = waypoints[i + 1]
+        const segArcs = isGeo
+          ? splitAntimeridian(greatCircle([a.lat, a.lng], [b.lat, b.lng]))
+          : [[[a.lat, a.lng], [b.lat, b.lng]] as [number, number][]]
+        arcs.push(...segArcs)
+        distanceKm += haversineKm([a.lat, a.lng], [b.lat, b.lng])
+      }
       const primaryIdx = arcs.reduce((best, seg, idx, all) => seg.length > all[best].length ? idx : best, 0)
       const primaryArc = arcs[primaryIdx] ?? []
       const fallback: [number, number] = primaryArc.length > 0
@@ -369,12 +384,15 @@ export default function ReservationOverlay({ reservations, showConnections, show
         : [(from.lat + to.lat) / 2, (from.lng + to.lng) / 2]
 
       const duration = computeDuration(from, to, r.reservation_time || null, r.reservation_end_time || null)
-      const distance = `${Math.round(haversineKm([from.lat, from.lng], [to.lat, to.lng]))} km`
-      const mainLabel = from.code && to.code ? `${from.code} → ${to.code}` : null
+      const distance = `${Math.round(distanceKm)} km`
+      // Show the full route (FRA → BER → HND) when every waypoint has a code.
+      const mainLabel = waypoints.every(w => w.code)
+        ? waypoints.map(w => w.code).join(' → ')
+        : (from.code && to.code ? `${from.code} → ${to.code}` : null)
       const subParts = [duration, distance].filter(Boolean) as string[]
       const subLabel = subParts.length > 0 ? subParts.join(' · ') : null
 
-      out.push({ res: r, from, to, type, arcs, primaryArc, fallback, mainLabel, subLabel })
+      out.push({ res: r, from, to, waypoints, type, arcs, primaryArc, fallback, mainLabel, subLabel })
     }
     return out
   }, [reservations])
@@ -416,38 +434,21 @@ export default function ReservationOverlay({ reservations, showConnections, show
         />
       )))}
 
-      {visibleItems.flatMap(item => [
+      {visibleItems.flatMap(item => item.waypoints.map((wp, wi) => (
         <Marker
-          key={`from-${item.res.id}`}
-          position={[item.from.lat, item.from.lng]}
-          icon={endpointIcon(item.type, showEndpointLabels && labelVisibleIds.has(item.res.id) ? (item.from.code || cleanName(item.from.name)) : null)}
+          key={`wp-${item.res.id}-${wi}`}
+          position={[wp.lat, wp.lng]}
+          icon={endpointIcon(item.type, showEndpointLabels && labelVisibleIds.has(item.res.id) ? (wp.code || cleanName(wp.name)) : null)}
           pane={ENDPOINT_PANE}
           zIndexOffset={1000}
           eventHandlers={{ click: () => onEndpointClick?.(item.res.id) }}
         >
           <Tooltip direction="top" offset={[0, -8]} opacity={1} className="map-tooltip">
-            <div style={{ fontWeight: 600, fontSize: 12 }}>{item.from.name}</div>
+            <div style={{ fontWeight: 600, fontSize: 12 }}>{wp.name}</div>
             {item.res.title && <div className="text-content-muted" style={{ fontSize: 11 }}>{item.res.title}</div>}
           </Tooltip>
-        </Marker>,
-        <Marker
-          key={`to-${item.res.id}`}
-          position={[item.to.lat, item.to.lng]}
-          icon={endpointIcon(item.type, showEndpointLabels && labelVisibleIds.has(item.res.id) ? (item.to.code || cleanName(item.to.name)) : null)}
-          pane={ENDPOINT_PANE}
-          zIndexOffset={1000}
-          eventHandlers={{ click: () => onEndpointClick?.(item.res.id) }}
-        >
-          <Tooltip direction="top" offset={[0, -8]} opacity={1} className="map-tooltip">
-            <div style={{ fontWeight: 600, fontSize: 12 }}>{item.to.name}</div>
-            {item.res.title && <div className="text-content-muted" style={{ fontSize: 11 }}>{item.res.title}</div>}
-          </Tooltip>
-        </Marker>,
-      ])}
-
-      {showStats && visibleItems.map(item => item.type === 'flight' && (item.mainLabel || item.subLabel) && labelVisibleIds.has(item.res.id) && (
-        <StatsLabel key={`stats-${item.res.id}`} item={item} />
-      ))}
+        </Marker>
+      )))}
     </>
   )
 }

client/src/components/Map/reservationsMapbox.ts

@@ -126,6 +126,7 @@ interface TransportItem {
   res: Reservation
   from: ReservationEndpoint
   to: ReservationEndpoint
+  waypoints: ReservationEndpoint[]
   type: TransportType
   arcs: [number, number][][]
   primaryArc: [number, number][]
@@ -137,23 +138,38 @@ function buildItems(reservations: Reservation[]): TransportItem[] {
   const out: TransportItem[] = []
   for (const r of reservations) {
     if (!TRANSPORT_TYPES.includes(r.type as TransportType)) continue
-    const eps = r.endpoints || []
-    const from = eps.find(e => e.role === 'from')
-    const to = eps.find(e => e.role === 'to')
-    if (!from || !to) continue
+    // Ordered waypoints (from · stops · to); a single-leg booking has exactly two.
+    const waypoints = (r.endpoints || [])
+      .filter(e => e.role === 'from' || e.role === 'to' || e.role === 'stop')
+      .slice()
+      .sort((a, b) => (a.sequence ?? 0) - (b.sequence ?? 0))
+    if (waypoints.length < 2) continue
+    const from = waypoints[0]
+    const to = waypoints[waypoints.length - 1]
     const type = r.type as TransportType
     const isGeo = TYPE_META[type].geodesic
-    const arcs = isGeo
-      ? splitAntimeridian(greatCircle([from.lat, from.lng], [to.lat, to.lng]))
-      : [[[from.lat, from.lng], [to.lat, to.lng]] as [number, number][]]
+    // One arc per leg (between consecutive waypoints), concatenated.
+    const arcs: [number, number][][] = []
+    let distanceKm = 0
+    for (let i = 0; i < waypoints.length - 1; i++) {
+      const a = waypoints[i]
+      const b = waypoints[i + 1]
+      const segArcs = isGeo
+        ? splitAntimeridian(greatCircle([a.lat, a.lng], [b.lat, b.lng]))
+        : [[[a.lat, a.lng], [b.lat, b.lng]] as [number, number][]]
+      arcs.push(...segArcs)
+      distanceKm += haversineKm([a.lat, a.lng], [b.lat, b.lng])
+    }
     const primaryIdx = arcs.reduce((best, seg, idx, all) => seg.length > all[best].length ? idx : best, 0)
     const primaryArc = arcs[primaryIdx] ?? []
     const duration = computeDuration(from, to, r.reservation_time || null, r.reservation_end_time || null)
-    const distance = `${Math.round(haversineKm([from.lat, from.lng], [to.lat, to.lng]))} km`
-    const mainLabel = from.code && to.code ? `${from.code} → ${to.code}` : null
+    const distance = `${Math.round(distanceKm)} km`
+    const mainLabel = waypoints.every(w => w.code)
+      ? waypoints.map(w => w.code).join(' → ')
+      : (from.code && to.code ? `${from.code} → ${to.code}` : null)
     const subParts = [duration, distance].filter(Boolean) as string[]
     const subLabel = subParts.length > 0 ? subParts.join(' · ') : null
-    out.push({ res: r, from, to, type, arcs, primaryArc, mainLabel, subLabel })
+    out.push({ res: r, from, to, waypoints, type, arcs, primaryArc, mainLabel, subLabel })
   }
   return out
 }
@@ -321,7 +337,7 @@ export class ReservationMapboxOverlay {
     if (show) {
       for (const item of visibleItems) {
         const showLabel = this.opts.showEndpointLabels && labelVisibleIds.has(item.res.id)
-        for (const ep of [item.from, item.to]) {
+        for (const ep of item.waypoints) {
           const label = showLabel ? (ep.code || cleanName(ep.name)) : null
           const el = document.createElement('div')
           el.innerHTML = endpointMarkerHtml(item.type, label)
@@ -342,29 +358,10 @@ export class ReservationMapboxOverlay {
       }
     }
 
-    // ── stats label (flights only) ──────────────────────────────────
+    // Stats badge removed — the floating route/duration label on the arc is no
+    // longer drawn; only the connection line and the airport markers remain.
     this.statsMarkers.forEach(s => s.marker.remove())
     this.statsMarkers = []
-    if (show && this.opts.showStats) {
-      for (const item of visibleItems) {
-        if (item.type !== 'flight') continue
-        if (!labelVisibleIds.has(item.res.id)) continue
-        if (!item.mainLabel && !item.subLabel) continue
-        const arc = item.primaryArc
-        if (arc.length < 2) continue
-        const mid = arc[Math.floor(arc.length / 2)]!
-        const { html, width, height } = buildStatsHtml(item.mainLabel, item.subLabel)
-        const el = document.createElement('div')
-        el.style.cssText = `width:${width}px;height:${height}px;pointer-events:none;`
-        el.innerHTML = html
-        const marker = new mapboxgl.Marker({ element: el, anchor: 'center' })
-          .setLngLat([mid[1], mid[0]])
-          .addTo(map)
-        this.statsMarkers.push({ marker, arc })
-      }
-    }
-    // Prime rotation once so labels don't flash horizontal on first paint.
-    this.updateStatsRotation()
   }
 
   // Match the Leaflet overlay's "rotate the label along the arc" look.