fix(ingress): route test111 /api/* to Rust gateway so signup works

The SolidStart frontend (Vinxi 0.5.7) does not mount src/routes/api/* as
Nitro handlers in the production build. With only a single path rule
pointing to the frontend pod, every /api/* call fell through to
SolidStart's Not Found handler and returned the HTML shell page — making
the Sign Up button appear to do nothing.

Added an /api prefix rule before / so Traefik matches the longer
prefix and forwards signup/login/KB requests directly to the
nxtgauge-rust-gateway service on port 9100 (same backend that
api.nxtgauge.com already uses).

Verified:
- POST /api/auth/check-email -> 200 application/json
- POST /api/auth/register   -> 201 application/json
- GET  /                    -> 200 text/html (frontend shell)
- GET  /api/kb/categories   -> 200 application/json

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

@@ -16,6 +16,17 @@ spec:
     - host: test111.nxtgauge.com
       http:
         paths:
+          # /api/* routes to Rust gateway directly (signup, login, KB, etc.)
+          # so the SolidStart frontend (which has no /api/auth/* handler due to
+          # the Vinxi 0.5.7 file-based-route bug) does not have to proxy itself.
+          # More specific paths must come first — Traefik matches the longest prefix.
+          - path: /api
+            pathType: Prefix
+            backend:
+              service:
+                name: nxtgauge-rust-gateway
+                port:
+                  number: 9100
           - path: /
             pathType: Prefix
             backend: