Fix View Route on Map — use sessionStorage instead of URL params

Hop hashes are 1-2 byte truncated values that don't work in URL params.
Now passes raw hops via sessionStorage; map page reads them after nodes
load and resolves via prefix match against full public keys.

public/map.js

@@ -88,45 +88,56 @@
     onWS(wsHandler);
 
     loadNodes().then(() => {
-      // Check for highlight route param (from packet detail)
-      const hashQuery = location.hash.split('?')[1];
-      if (hashQuery) {
-        const params = new URLSearchParams(hashQuery);
-        const highlight = params.get('highlight');
-        if (highlight) drawPacketRoute(highlight.split(','));
+      // Check for route from packet detail (via sessionStorage)
+      const routeHopsJson = sessionStorage.getItem('map-route-hops');
+      if (routeHopsJson) {
+        sessionStorage.removeItem('map-route-hops');
+        try {
+          const hopKeys = JSON.parse(routeHopsJson);
+          drawPacketRoute(hopKeys);
+        } catch {}
       }
     });
   }
 
   function drawPacketRoute(hopKeys) {
-    // Resolve hop keys to positions
+    // Resolve hop short hashes to node positions via prefix match
     const positions = [];
     for (const hop of hopKeys) {
+      const hopLower = hop.toLowerCase();
       const node = nodes.find(n =>
-        n.public_key.toLowerCase().startsWith(hop.toLowerCase())
+        n.public_key.toLowerCase().startsWith(hopLower)
       );
       if (node && node.lat != null && node.lon != null && !(node.lat === 0 && node.lon === 0)) {
         positions.push({ lat: node.lat, lon: node.lon, name: node.name || hop });
       }
     }
-    if (positions.length < 2) return;
+    if (positions.length < 1) return;
 
-    // Draw route polyline
+    // Even a single node is worth showing (zoom to it)
     const coords = positions.map(p => [p.lat, p.lon]);
-    const routeLine = L.polyline(coords, {
-      color: '#f59e0b', weight: 3, opacity: 0.8, dashArray: '8 4'
-    }).addTo(markerLayer);
+
+    if (positions.length >= 2) {
+      // Draw route polyline
+      L.polyline(coords, {
+        color: '#f59e0b', weight: 3, opacity: 0.8, dashArray: '8 4'
+      }).addTo(markerLayer);
+    }
 
     // Add numbered markers at each hop
     positions.forEach((p, i) => {
       L.circleMarker([p.lat, p.lon], {
-        radius: 8, fillColor: i === 0 ? '#22c55e' : i === positions.length - 1 ? '#ef4444' : '#f59e0b',
+        radius: 10, fillColor: i === 0 ? '#22c55e' : i === positions.length - 1 ? '#ef4444' : '#f59e0b',
         fillOpacity: 0.9, color: '#fff', weight: 2
       }).addTo(markerLayer).bindTooltip(`${i + 1}. ${p.name}`, { permanent: true, direction: 'top', className: 'route-tooltip' });
     });
 
     // Fit map to route
-    map.fitBounds(L.latLngBounds(coords).pad(0.2));
+    if (coords.length >= 2) {
+      map.fitBounds(L.latLngBounds(coords).pad(0.3));
+    } else {
+      map.setView(coords[0], 13);
+    }
   }
 
   async function loadNodes() {

public/packets.js

@@ -445,7 +445,7 @@
         <dt>Timestamp</dt><dd>${pkt.timestamp}</dd>
         <dt>Path</dt><dd>${pathHops.length ? renderPath(pathHops) : '—'}</dd>
       </dl>
-      ${pathHops.length ? `<a class="detail-map-link" href="#/map?highlight=${encodeURIComponent(pathHops.join(','))}&packet=${pkt.hash || pkt.id}" onclick="event.stopPropagation()">🗺️ View route on map</a>` : ''}
+      ${pathHops.length ? `<button class="detail-map-link" id="viewRouteBtn">🗺️ View route on map</button>` : ''}
 
       ${hasRawHex ? `<div class="hex-legend">${buildHexLegend(ranges)}</div>
       <div class="hex-dump">${createColoredHexDump(pkt.raw_hex, ranges)}</div>` : ''}
@@ -459,7 +459,6 @@
     const replayBtn = panel.querySelector('.replay-live-btn');
     if (replayBtn) {
       replayBtn.addEventListener('click', () => {
-        // Store packet in sessionStorage for the live page to pick up
         const livePkt = {
           id: pkt.id, hash: pkt.hash,
           _ts: new Date(pkt.timestamp).getTime(),
@@ -470,6 +469,27 @@
         window.location.hash = '#/live';
       });
     }
+
+    // Wire up view route on map button
+    const routeBtn = document.getElementById('viewRouteBtn');
+    if (routeBtn && pathHops.length) {
+      routeBtn.addEventListener('click', async () => {
+        try {
+          const resp = await fetch('/api/resolve-hops?hops=' + encodeURIComponent(pathHops.join(',')));
+          const data = await resp.json();
+          // Build array of {hop, name, pubkey} with resolved full pubkeys
+          const resolvedHops = pathHops.map(h => {
+            const name = data.resolved[h];
+            // Find full pubkey from name if possible
+            return name || h;
+          });
+          sessionStorage.setItem('map-route-hops', JSON.stringify(pathHops));
+          window.location.hash = '#/map?route=1';
+        } catch {
+          window.location.hash = '#/map';
+        }
+      });
+    }
   }
 
   function escapeHtml(s) {