feat: VLAN in FDB, persist vlan, enrich port-devices with hostname, UI columns

Made-with: Cursor

internal/api/handler.go

@@ -364,8 +364,30 @@ func (h *Handler) getScanPortDevices(w http.ResponseWriter, r *http.Request) {
 		}
 		limit = n
 	}
+	snmpItems := h.store.ListSNMPResults(id, 200000)
+	ipToName := make(map[string]string, len(snmpItems))
+	for _, s := range snmpItems {
+		if !s.Success {
+			continue
+		}
+		name := strings.TrimSpace(s.SysName)
+		if name == "" {
+			continue
+		}
+		if _, ok := ipToName[s.IP]; !ok {
+			ipToName[s.IP] = name
+		}
+	}
+	items := h.store.ListPortDeviceResults(id, ip, ifIndex, limit)
+	for i := range items {
+		if lip := strings.TrimSpace(items[i].LearnedIP); lip != "" {
+			if nm, ok := ipToName[lip]; ok {
+				items[i].Hostname = nm
+			}
+		}
+	}
 	writeJSON(w, http.StatusOK, map[string]any{
-		"items": h.store.ListPortDeviceResults(id, ip, ifIndex, limit),
+		"items": items,
 	})
 }