Show AS descriptions in AS path on prefix detail page

- Display AS descriptions alongside AS numbers in format: Description (ASN)
- Truncate descriptions longer than 20 characters with ellipsis
- Increase container max width to 1600px for better display
- Enable word wrapping for AS path cells to handle long paths
- Update mobile responsive styles for AS path display

internal/server/handlers.go

@@ -15,10 +15,16 @@ import (
 
 	"git.eeqj.de/sneak/routewatch/internal/database"
 	"git.eeqj.de/sneak/routewatch/internal/templates"
+	"git.eeqj.de/sneak/routewatch/pkg/asinfo"
 	"github.com/dustin/go-humanize"
 	"github.com/go-chi/chi/v5"
 )
 
+const (
+	// maxASDescriptionLength is the maximum length for AS descriptions in the UI
+	maxASDescriptionLength = 20
+)
+
 // handleRoot returns a handler that redirects to /status
 func (s *Server) handleRoot() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
@@ -645,12 +651,45 @@ func (s *Server) handlePrefixDetail() http.HandlerFunc {
 			origins = append(origins, origin)
 		}
 
+		// Create enhanced routes with AS path descriptions
+		type ASPathEntry struct {
+			Number      int
+			Description string
+		}
+		type EnhancedRoute struct {
+			database.LiveRoute
+			ASPathWithDesc []ASPathEntry
+		}
+
+		enhancedRoutes := make([]EnhancedRoute, len(routes))
+		for i, route := range routes {
+			enhancedRoute := EnhancedRoute{
+				LiveRoute:      route,
+				ASPathWithDesc: make([]ASPathEntry, len(route.ASPath)),
+			}
+
+			// Look up description for each AS in the path
+			for j, asn := range route.ASPath {
+				desc := asinfo.GetDescription(asn)
+				// Truncate description if longer than maxASDescriptionLength characters
+				if len(desc) > maxASDescriptionLength {
+					desc = desc[:maxASDescriptionLength] + "..."
+				}
+				enhancedRoute.ASPathWithDesc[j] = ASPathEntry{
+					Number:      asn,
+					Description: desc,
+				}
+			}
+
+			enhancedRoutes[i] = enhancedRoute
+		}
+
 		// Prepare template data
 		data := struct {
 			Prefix      string
 			MaskLength  int
 			IPVersion   int
-			Routes      []database.LiveRoute
+			Routes      []EnhancedRoute
 			Origins     []*ASNInfo
 			PeerCount   int
 			OriginCount int
@@ -658,7 +697,7 @@ func (s *Server) handlePrefixDetail() http.HandlerFunc {
 			Prefix:      prefix,
 			MaskLength:  maskLength,
 			IPVersion:   ipVersion,
-			Routes:      routes,
+			Routes:      enhancedRoutes,
 			Origins:     origins,
 			PeerCount:   len(routes),
 			OriginCount: len(originMap),