hub: unified customer page, blocked status, dashboard merge

- Replace separate config detail and report detail pages with unified
  /customers/{id} page showing both config info and live report data
- Add "blocked" status for customers (hidden from dashboard, notifications
  suppressed, still accepts reports)
- Dashboard now shows config-only customers as "PENDING" status
- Customers list: all rows link to /customers/{id}, show BLOCKED badge
- New actions: block/unblock, push config to controller, auto-create
  config from report data
- /configs/{id} now redirects to /customers/{id}
- Add config-badge CSS classes for MANAGED/MANUAL/BLOCKED badges

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

hub/internal/api/handler.go

@@ -255,6 +255,15 @@ func (h *Handler) handleNotify(w http.ResponseWriter, r *http.Request) {
 
 	h.logger.Printf("[INFO] Notification from %s: %s (%s) — %s", payload.CustomerID, payload.EventType, payload.Severity, payload.Message)
 
+	// Check if customer is blocked
+	if h.store.IsCustomerBlocked(payload.CustomerID) {
+		h.logger.Printf("[INFO] Notification suppressed for blocked customer %s", payload.CustomerID)
+		h.store.LogNotification(payload.CustomerID, payload.EventType, payload.Severity, payload.Message, "skipped", "customer blocked")
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(`{"status":"ok","sent":false,"reason":"blocked"}`))
+		return
+	}
+
 	// Look up customer notification preferences
 	prefs, err := h.store.GetNotificationPrefs(payload.CustomerID)
 	if err != nil {