Rename frontend: assay-frontend -> nyx

nyx is the unified frontend, assay is the backend runtime.
K8s deployment, service, image all renamed to nyx.
Ingress catch-all route updated to point to nyx service.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

k8s/assay-ingress.yaml

@@ -58,6 +58,6 @@ spec:
             pathType: Prefix
             backend:
               service:
-                name: assay-frontend
+                name: nyx
                 port:
                   number: 80

k8s/nyx.yaml

@@ -1,13 +1,13 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: assay-frontend
+  name: nyx
   namespace: default
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: assay-frontend
+      app: nyx
   strategy:
     type: RollingUpdate
     rollingUpdate:
@@ -16,11 +16,11 @@ spec:
   template:
     metadata:
       labels:
-        app: assay-frontend
+        app: nyx
     spec:
       containers:
         - name: nginx
-          image: docker.io/library/assay-frontend:latest
+          image: docker.io/library/nyx:latest
           imagePullPolicy: Never
           ports:
             - containerPort: 80
@@ -47,11 +47,11 @@ spec:
 apiVersion: v1
 kind: Service
 metadata:
-  name: assay-frontend
+  name: nyx
   namespace: default
 spec:
   selector:
-    app: assay-frontend
+    app: nyx
   ports:
     - port: 80
       targetPort: 80