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

selective-vpn-api/app/transport_handlers_actions_exec_health.go

@@ -0,0 +1,60 @@
+package app
+
+import (
+	"net/http"
+	"strings"
+	"time"
+)
+
+func handleTransportClientHealthAction(w http.ResponseWriter, r *http.Request, id string) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	transportMu.Lock()
+	st := loadTransportClientsState()
+	transportMu.Unlock()
+	idx := findTransportClientIndex(st.Items, id)
+	if idx < 0 {
+		writeJSON(w, http.StatusNotFound, TransportClientHealthResponse{
+			OK:      false,
+			Message: "not found",
+			Code:    "TRANSPORT_CLIENT_NOT_FOUND",
+		})
+		return
+	}
+	it := st.Items[idx]
+	now := time.Now().UTC()
+	backend := selectTransportBackend(it)
+	probe := backend.Health(it)
+	snapshot := applyTransportHealthProbeSnapshot(it, backend.ID(), probe, now)
+	resp := buildTransportHealthResponse(snapshot, now)
+	if !probe.OK && strings.TrimSpace(probe.Code) != "" {
+		resp.Code = probe.Code
+		if strings.TrimSpace(probe.Message) != "" {
+			resp.Message = probe.Message
+		}
+	}
+	writeJSON(w, http.StatusOK, resp)
+}
+
+func handleTransportClientMetricsAction(w http.ResponseWriter, r *http.Request, id string) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	transportMu.Lock()
+	st := loadTransportClientsState()
+	transportMu.Unlock()
+	idx := findTransportClientIndex(st.Items, id)
+	if idx < 0 {
+		writeJSON(w, http.StatusNotFound, TransportClientMetricsResponse{
+			OK:      false,
+			Message: "not found",
+			Code:    "TRANSPORT_CLIENT_NOT_FOUND",
+		})
+		return
+	}
+	it := st.Items[idx]
+	writeJSON(w, http.StatusOK, buildTransportMetricsResponse(it, time.Now().UTC()))
+}