feat(helm): add frontend deployment and service templates

Simple nginx-based deployment serving the React SPA on port 80,
no runtime env or volumes required.

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

infrastructure/helm/templates/frontend-service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "tod.fullname" . }}-frontend
+  labels:
+    {{- include "tod.componentLabels" (dict "context" . "component" "frontend") | nindent 4 }}
+spec:
+  type: ClusterIP
+  ports:
+    - name: http
+      port: {{ .Values.frontend.service.port }}
+      targetPort: http
+      protocol: TCP
+  selector:
+    {{- include "tod.componentSelectorLabels" (dict "context" . "component" "frontend") | nindent 4 }}