fix: display correct number of machines on dashboard

Rename members to machines to be clearer.
Display the correct member count.

Closes siderolabs/talos#7127.

Signed-off-by: Utku Ozdemir <utku.ozdemir@siderolabs.com>

internal/pkg/dashboard/components/talosinfo.go

@@ -22,9 +22,9 @@ type talosInfoData struct {
 	stage           string
 	ready           string
 	typ             string
-	numMembersText string
+	numMachinesText string
 
-	numMembers int
+	machineIDSet map[string]struct{}
 }
 
 // TalosInfo represents the Talos info widget.
@@ -101,12 +101,12 @@ func (widget *TalosInfo) updateNodeData(data resourcedata.Data) {
 		}
 	case *cluster.Member:
 		if data.Deleted {
-			nodeData.numMembers--
+			delete(nodeData.machineIDSet, res.Metadata().ID())
 		} else {
-			nodeData.numMembers++
+			nodeData.machineIDSet[res.Metadata().ID()] = struct{}{}
 		}
 
-		nodeData.numMembersText = strconv.Itoa(nodeData.numMembers)
+		nodeData.numMachinesText = strconv.Itoa(len(nodeData.machineIDSet))
 	}
 }
 
@@ -119,7 +119,8 @@ func (widget *TalosInfo) getOrCreateNodeData(node string) *talosInfoData {
 			stage:           notAvailable,
 			ready:           notAvailable,
 			typ:             notAvailable,
-			numMembersText: notAvailable,
+			numMachinesText: notAvailable,
+			machineIDSet:    make(map[string]struct{}),
 		}
 
 		widget.nodeMap[node] = nodeData
@@ -154,8 +155,8 @@ func (widget *TalosInfo) redraw() {
 				Value: data.typ,
 			},
 			{
-				Name:  "MEMBERS",
+				Name:  "MACHINES",
-				Value: data.numMembersText,
+				Value: data.numMachinesText,
 			},
 		},
 	}