feat: add nxtgauge.com/www ingress rules, drop coming-soon from cluster kustomization

Forgot to stage these in 643ab49 - the actual ingress host rules and
the removal of the apps/nxtgauge-coming-soon reference from
clusters/production/kustomization.yaml, without which nothing in the
previous commit actually took effect.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/nxtgauge-frontend-solid/base/ingress.yaml

@@ -12,6 +12,14 @@ spec:
     - hosts:
         - test111.nxtgauge.com
       secretName: test111-tls
+    # nxtgauge.com/www serve the SAME app/deployment as test111 - the only
+    # difference is src/middleware.ts redirects "/" on these two hosts to
+    # /coming-soon (pre-launch placeholder) while test111 shows the real
+    # app. No separate service/deployment needed.
+    - hosts:
+        - nxtgauge.com
+        - www.nxtgauge.com
+      secretName: nxtgauge-com-tls
   rules:
     - host: test111.nxtgauge.com
       http:
@@ -34,3 +42,37 @@ spec:
                 name: nxtgauge-frontend-solid
                 port:
                   number: 80
+    - host: nxtgauge.com
+      http:
+        paths:
+          - path: /api
+            pathType: Prefix
+            backend:
+              service:
+                name: nxtgauge-rust-gateway
+                port:
+                  number: 9100
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: nxtgauge-frontend-solid
+                port:
+                  number: 80
+    - host: www.nxtgauge.com
+      http:
+        paths:
+          - path: /api
+            pathType: Prefix
+            backend:
+              service:
+                name: nxtgauge-rust-gateway
+                port:
+                  number: 9100
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: nxtgauge-frontend-solid
+                port:
+                  number: 80

clusters/production/kustomization.yaml

@@ -5,7 +5,6 @@ resources:
   - ../../apps/nxtgauge-backend-rust/overlays/prod
   - ../../apps/nxtgauge-frontend-solid/overlays/prod
   - ../../apps/nxtgauge-admin-solid/overlays/prod
-  - ../../apps/nxtgauge-coming-soon/overlays/prod
   - ../../apps/nxtgauge-ai-assistant/overlays/prod
   - ../../apps/github-actions-runners/base
   - ../../apps/ollama/base