优化结构

internal/global/resources.go

@@ -238,6 +238,15 @@ func normalizeInterface[T any](value T) T {
 
 var defaultResources = NewResourceRegistry()
 
+// Install publishes resources assembled by the composition root and returns
+// the process-wide registry for lifecycle wiring.
+func Install(resources Resources) *ResourceRegistry {
+	defaultResources.Replace(resources)
+	return defaultResources
+}
+
+func DefaultRegistry() *ResourceRegistry { return defaultResources }
+
 func ResourceSnapshot() Resources { return defaultResources.Snapshot() }
 
 func ReplaceResources(resources Resources) { defaultResources.Replace(resources) }