Add AS peers display to AS detail page

- Added GetASPeers method to database to fetch all peering relationships
- Updated AS detail handler to fetch and pass peers to template
- Added peers section to AS detail page showing all peer ASNs with their info
- Added peer count to the info cards at the top of the page
- Shows handle, description, and first/last seen dates for each peer

internal/server/handlers.go

@@ -493,6 +493,14 @@ func (s *Server) handleASDetail() http.HandlerFunc {
 			return
 		}
 
+		// Get peers
+		peers, err := s.db.GetASPeersContext(r.Context(), asn)
+		if err != nil {
+			s.logger.Error("Failed to get AS peers", "error", err)
+			// Continue without peers rather than failing the whole request
+			peers = []database.ASPeer{}
+		}
+
 		// Group prefixes by IP version
 		const ipVersionV4 = 4
 		var ipv4Prefixes, ipv6Prefixes []database.LiveRoute
@@ -549,6 +557,8 @@ func (s *Server) handleASDetail() http.HandlerFunc {
 			TotalCount   int
 			IPv4Count    int
 			IPv6Count    int
+			Peers        []database.ASPeer
+			PeerCount    int
 		}{
 			ASN:          asInfo,
 			IPv4Prefixes: ipv4Prefixes,
@@ -556,6 +566,8 @@ func (s *Server) handleASDetail() http.HandlerFunc {
 			TotalCount:   len(prefixes),
 			IPv4Count:    len(ipv4Prefixes),
 			IPv6Count:    len(ipv6Prefixes),
+			Peers:        peers,
+			PeerCount:    len(peers),
 		}
 
 		// Check if context is still valid before writing response