Add Emberwake Cloud Ecosystem deploy hub with AWS and generic spread templates.

Unified expandable panels with mermaid flows, ZIP export, connection tests, and Playwright smoke coverage.

server/internal/cloudmap/registry_test.go

@@ -0,0 +1,9 @@
+package cloudmap
+
+import "testing"
+
+func TestSeederDNSName(t *testing.T) {
+	if got := SeederDNSName("seeder", "prod.local"); got != "seeder.svc.prod.local" {
+		t.Fatalf("got %q", got)
+	}
+}