fix(k8s): declare every theme type in big-demo so the account console loads (refs #177)

KC_SPI_THEME_DEFAULT applies to all theme types and Keycloak does not fall back
for one the theme lacks: the account console returned 500 (NPE on a null
theme). The theme is now one ConfigMap mounted as a directory with login,
account, admin and email types; the podspec gains `items` for that.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

infra/helm/big-reference/values.yaml

@@ -289,8 +289,14 @@ workloads:
     probe: { tcpSocket: { port: 8080 }, initialDelaySeconds: 15 }
     files:
       - { configMap: rr-kc-realms, mountPath: /opt/keycloak/data/import }
-      - { configMap: kc-theme, mountPath: /opt/keycloak/themes/big-demo/login/theme.properties, subPath: theme.properties }
-      - { configMap: kc-theme-js, mountPath: /opt/keycloak/themes/big-demo/login/resources/js/otp-autofill.js, subPath: otp-autofill.js }
+      - configMap: kc-theme
+        mountPath: /opt/keycloak/themes/big-demo
+        items:
+          - { key: login.properties, path: login/theme.properties }
+          - { key: otp-autofill.js, path: login/resources/js/otp-autofill.js }
+          - { key: account.properties, path: account/theme.properties }
+          - { key: admin.properties, path: admin/theme.properties }
+          - { key: email.properties, path: email/theme.properties }
 
   # ── Flowable (S-03) ─────────────────────────────────────────────────────────
   flowable-db: