platform: modularize api/gui, add docs-tests-web foundation, and refresh root config

selective-vpn-api/app/transport_health_refresh_queue.go

@@ -0,0 +1,48 @@
+package app
+
+import (
+	"strings"
+	"time"
+)
+
+func transportHealthCandidate(item TransportClient) bool {
+	if strings.TrimSpace(item.ID) == "" {
+		return false
+	}
+	if !item.Enabled {
+		return false
+	}
+	switch normalizeTransportStatus(item.Status) {
+	case TransportClientUp, TransportClientStarting, TransportClientDegraded:
+		return true
+	default:
+		return false
+	}
+}
+
+func transportQueueHealthProbe(item TransportClient, force bool) bool {
+	now := time.Now()
+	if !transportHealthSWR.begin(item, force, now) {
+		return false
+	}
+	id := strings.TrimSpace(item.ID)
+	if id == "" {
+		transportHealthSWR.finishError(id, "missing client id", now)
+		return false
+	}
+	go transportRunHealthProbe(id)
+	return true
+}
+
+func transportScheduleBackgroundHealthRefresh(known []TransportClient, targets []TransportClient) {
+	if len(known) == 0 || len(targets) == 0 {
+		return
+	}
+	transportHealthSWR.syncKnownClients(known)
+	for _, it := range targets {
+		if !transportHealthCandidate(it) {
+			continue
+		}
+		transportQueueHealthProbe(it, false)
+	}
+}