Update AS path display to show handles with clickable links

- Change AS path from descriptions to handles (short names)
- Make each AS in the path a clickable link to /as/<asn>
- Add font-weight to AS links in path for better visibility
- Prevent word wrapping on all table columns except AS path
- Remove unused maxASDescriptionLength constant

internal/templates/prefix_detail.html

@@ -92,6 +92,7 @@
         .route-table td {
             padding: 12px;
             border-bottom: 1px solid #e0e0e0;
+            white-space: nowrap;
         }
         .route-table tr:hover {
             background: #f8f9fa;
@@ -117,9 +118,12 @@
             color: #666;
             max-width: 600px;
             word-wrap: break-word;
-            white-space: normal;
+            white-space: normal !important;
             line-height: 1.5;
         }
+        .as-path .as-link {
+            font-weight: 600;
+        }
         .age {
             color: #7f8c8d;
             font-size: 14px;
@@ -236,7 +240,7 @@
                             <a href="/as/{{.OriginASN}}" class="as-link">AS{{.OriginASN}}</a>
                         </td>
                         <td class="peer-ip">{{.PeerIP}}</td>
-                        <td class="as-path">{{range $i, $as := .ASPathWithDesc}}{{if $i}} → {{end}}{{if $as.Description}}{{$as.Description}} ({{$as.Number}}){{else}}AS{{$as.Number}}{{end}}{{end}}</td>
+                        <td class="as-path">{{range $i, $as := .ASPathWithHandle}}{{if $i}} → {{end}}<a href="/as/{{$as.Number}}" class="as-link">{{if $as.Handle}}{{$as.Handle}}{{else}}AS{{$as.Number}}{{end}}</a>{{end}}</td>
                         <td class="peer-ip">{{.NextHop}}</td>
                         <td>{{.LastUpdated.Format "2006-01-02 15:04:05"}}</td>
                         <td class="age">{{.LastUpdated | timeSince}}</td>