feat: merge report-only customers into Customers page, rename tab

- Customers page now shows ALL customers: both pre-configured (managed)
  and report-only (manual) — merged from customer_configs + reports tables
- Renamed "Configurations" → "Customers" in navigation tabs
- Renamed "+ New Configuration" → "+ Add Customer"
- Status column with ok/warn/down badges, version column, managed/manual badge

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hub/internal/web/configs.go

@@ -5,7 +5,9 @@ import (
 	"fmt"
 	"net/http"
 	"regexp"
+	"sort"
 	"strings"
+	"time"
 
 	"gitea.dooplex.hu/admin/felhom-hub/internal/configgen"
 	"gitea.dooplex.hu/admin/felhom-hub/internal/store"
@@ -13,7 +15,19 @@ import (
 
 var validCustomerID = regexp.MustCompile(`^[a-zA-Z0-9.\-]+$`)
 
-// handleConfigList shows all customer configurations.
+// customerListEntry is a merged view of a customer from both configs and reports.
+type customerListEntry struct {
+	CustomerID        string
+	CustomerName      string
+	Domain            string
+	HasConfig         bool
+	OverallStatus     string // ok, warn, down, disabled, "" if no reports
+	ControllerVersion string
+	TimeSinceReport   time.Duration
+	ConfigCreatedAt   time.Time
+}
+
+// handleConfigList shows all customers (merged from configs + reports).
 func (s *Server) handleConfigList(w http.ResponseWriter, r *http.Request) {
 	configs, err := s.store.ListCustomerConfigs()
 	if err != nil {
@@ -22,12 +36,73 @@ func (s *Server) handleConfigList(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	customers, err := s.store.GetCustomers()
+	if err != nil {
+		s.logger.Printf("[ERROR] Failed to list customers: %v", err)
+		http.Error(w, "Internal error", http.StatusInternalServerError)
+		return
+	}
+
+	// Build merged map keyed by customer_id
+	merged := make(map[string]*customerListEntry)
+
+	for _, cfg := range configs {
+		merged[cfg.CustomerID] = &customerListEntry{
+			CustomerID:      cfg.CustomerID,
+			CustomerName:    cfg.CustomerName,
+			Domain:          cfg.Domain,
+			HasConfig:       true,
+			ConfigCreatedAt: cfg.CreatedAt,
+		}
+	}
+
+	for _, c := range customers {
+		status := "ok"
+		if c.HealthStatus == "disabled" {
+			status = "disabled"
+		} else if c.TimeSinceReport > time.Hour {
+			status = "down"
+		} else if c.TimeSinceReport > 30*time.Minute || c.HealthStatus == "warn" {
+			status = "warn"
+		} else if c.HealthStatus == "fail" {
+			status = "down"
+		}
+
+		if entry, ok := merged[c.CustomerID]; ok {
+			// Config exists — enrich with report data
+			entry.OverallStatus = status
+			entry.ControllerVersion = c.ControllerVersion
+			entry.TimeSinceReport = c.TimeSinceReport
+			if entry.CustomerName == "" {
+				entry.CustomerName = c.CustomerName
+			}
+		} else {
+			// Report-only customer (no config)
+			merged[c.CustomerID] = &customerListEntry{
+				CustomerID:        c.CustomerID,
+				CustomerName:      c.CustomerName,
+				OverallStatus:     status,
+				ControllerVersion: c.ControllerVersion,
+				TimeSinceReport:   c.TimeSinceReport,
+			}
+		}
+	}
+
+	// Sort by customer_id
+	entries := make([]customerListEntry, 0, len(merged))
+	for _, e := range merged {
+		entries = append(entries, *e)
+	}
+	sort.Slice(entries, func(i, j int) bool {
+		return entries[i].CustomerID < entries[j].CustomerID
+	})
+
 	data := struct {
-		Configs   []store.CustomerConfig
+		Customers []customerListEntry
 		ActiveNav string
 		Flash     string
 	}{
-		Configs:   configs,
+		Customers: entries,
 		ActiveNav: "configs",
 		Flash:     r.URL.Query().Get("flash"),
 	}