hub v0.31.0: accept 'critical' severity at event ingest + UI badges/CSS; event_test.go (red-proofed); REUSE.md §1/§3 updated

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSK5g6qYLknKj8u3QAFEr6

hub/internal/web/server.go

@@ -497,10 +497,11 @@ func (s *Server) handleDashboard(w http.ResponseWriter, r *http.Request) {
 
 	type dashboardCustomer struct {
 		store.CustomerSummary
-		OverallStatus string // "ok", "warn", "down", "pending"
-		BackupAge     string
-		EventErrors   int
-		EventWarnings int
+		OverallStatus  string // "ok", "warn", "down", "pending"
+		BackupAge      string
+		EventCriticals int
+		EventErrors    int
+		EventWarnings  int
 	}
 
 	// Build map of report customers keyed by ID
@@ -537,6 +538,7 @@ func (s *Server) handleDashboard(w http.ResponseWriter, r *http.Request) {
 
 		// Event counts (last 24h)
 		if counts, err := s.store.CountEventsBySeverity(c.CustomerID, time.Now().Add(-24*time.Hour)); err == nil {
+			dc.EventCriticals = counts["critical"]
 			dc.EventErrors = counts["error"]
 			dc.EventWarnings = counts["warning"]
 		}