feat(ui): add responsive dashboard and LuCI states

agent/go/cmd/rmm-agent/main.go

@@ -301,6 +301,7 @@ func buildInventory(cfg config) map[string]any {
 		"default_route":   firstLine(commandOutput("ip", "route", "show", "default")),
 		"wan_ip":          wanIP(),
 		"dhcp_leases":     dhcpLeases(),
+		"neighbors":       neighbors(),
 		"wifi_clients":    wifiClients(),
 	}
 }
@@ -1357,6 +1358,37 @@ func dhcpLeases() []map[string]string {
 	return leases
 }
 
+func neighbors() []map[string]string {
+	return parseIPNeighbors(commandOutput("ip", "neigh", "show"))
+}
+
+func parseIPNeighbors(output string) []map[string]string {
+	result := make([]map[string]string, 0)
+	for _, line := range strings.Split(output, "\n") {
+		fields := strings.Fields(line)
+		if len(fields) < 3 {
+			continue
+		}
+		neighbor := map[string]string{
+			"ip":    fields[0],
+			"state": strings.ToUpper(fields[len(fields)-1]),
+		}
+		for index := 1; index+1 < len(fields); index++ {
+			switch fields[index] {
+			case "dev":
+				neighbor["interface"] = fields[index+1]
+			case "lladdr":
+				neighbor["mac"] = strings.ToUpper(fields[index+1])
+			}
+		}
+		if neighbor["interface"] == "" {
+			continue
+		}
+		result = append(result, neighbor)
+	}
+	return result
+}
+
 func wifiClients() []map[string]string {
 	if _, err := exec.LookPath("iwinfo"); err != nil {
 		return []map[string]string{}

agent/go/cmd/rmm-agent/main_test.go

@@ -78,6 +78,26 @@ func TestLooksLikeMAC(t *testing.T) {
 	}
 }
 
+func TestParseIPNeighbors(t *testing.T) {
+	output := `10.10.10.2 dev br-lan lladdr 10:ff:e0:21:bc:b9 REACHABLE
+10.10.10.190 dev br-lan FAILED
+fe80::1234 dev br-lan lladdr aa:bb:cc:dd:ee:ff router STALE`
+
+	neighbors := parseIPNeighbors(output)
+	if len(neighbors) != 3 {
+		t.Fatalf("expected 3 neighbors, got %d", len(neighbors))
+	}
+	if neighbors[0]["mac"] != "10:FF:E0:21:BC:B9" || neighbors[0]["state"] != "REACHABLE" {
+		t.Fatalf("unexpected reachable neighbor: %#v", neighbors[0])
+	}
+	if neighbors[1]["ip"] != "10.10.10.190" || neighbors[1]["state"] != "FAILED" {
+		t.Fatalf("unexpected failed neighbor: %#v", neighbors[1])
+	}
+	if neighbors[2]["interface"] != "br-lan" || neighbors[2]["state"] != "STALE" {
+		t.Fatalf("unexpected stale neighbor: %#v", neighbors[2])
+	}
+}
+
 func TestParsePacketLossBusyBox(t *testing.T) {
 	output := `PING 10.10.10.10 (10.10.10.10): 56 data bytes
 64 bytes from 10.10.10.10: seq=0 ttl=64 time=1.157 ms