feat: add K8s deployment manifest with GW_URL and BLAZOR_ENVIRONMENT

- Create k8s/staging/backoffice-deployment.yaml with env vars:
  GW_URL=https://cms.se.kbs1.ir (injected into appsettings at startup)
  BLAZOR_ENVIRONMENT=Staging
- Update CI/CD to apply K8s manifests on deploy (like CMS does)
- This makes configuration persistent across CI/CD deployments

.gitea/workflows/kub-deploy.yml

@@ -67,8 +67,15 @@ jobs:
       - name: Deploy to Kubernetes
         run: |
           export SSHPASS="${{ secrets.SERVER_PASSWORD }}"
+          
+          # Copy K8s manifests to server
+          sshpass -e scp -o StrictHostKeyChecking=no k8s/staging/backoffice-deployment.yaml root@${{ env.K8S_SERVER }}:/tmp/backoffice-deployment.yaml
+          
+          # Apply manifests and restart
           sshpass -e ssh -o StrictHostKeyChecking=no root@${{ env.K8S_SERVER }} "
-            kubectl rollout restart deployment/backoffice
-            kubectl rollout status deployment/backoffice --timeout=180s
+            kubectl apply -f /tmp/backoffice-deployment.yaml &&
+            kubectl rollout restart deployment/backoffice &&
+            kubectl rollout status deployment/backoffice --timeout=180s &&
+            rm -f /tmp/backoffice-deployment.yaml
           "
           echo "✅ Deployed!"