fix: remove GitHub dependencies from CI/CD workflow

Replace all GitHub-hosted actions with shell commands to avoid
GitHub connectivity issues on China servers.

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

.gitea/workflows/deploy.yaml

@@ -27,56 +27,43 @@ jobs:
             echo "DOMAIN_WEB=qiyuan-log-center-web.test.airlabs.art" >> $GITHUB_ENV
           fi
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-        with:
-          config-inline: |
-            [registry."docker.io"]
-              mirrors = ["https://docker.m.daocloud.io", "https://docker.1panel.live", "https://hub.rat.dev"]
-
       - name: Login to Volcano Engine CR
-        uses: docker/login-action@v2
-        with:
-          registry: ${{ secrets.CR_SERVER }}
-          username: ${{ secrets.CR_USERNAME }}
-          password: ${{ secrets.CR_PASSWORD }}
+        run: |
+          echo "${{ secrets.CR_PASSWORD }}" | docker login --username "${{ secrets.CR_USERNAME }}" --password-stdin ${{ secrets.CR_SERVER }}
 
       # Build API Image
       - name: Build and Push API
         id: build-api
         run: |
           set -o pipefail
-          docker buildx build \
-            --push \
-            --provenance=false \
+          docker build \
             --tag ${{ secrets.CR_SERVER }}/${{ env.CR_ORG }}/log-center-api:latest \
             -f ./Dockerfile \
             . 2>&1 | tee /tmp/build-api.log
+          docker push ${{ secrets.CR_SERVER }}/${{ env.CR_ORG }}/log-center-api:latest 2>&1 | tee -a /tmp/build-api.log
 
       # Build Web Image
       - name: Build and Push Web
         id: build-web
         run: |
           set -o pipefail
-          docker buildx build \
-            --push \
-            --provenance=false \
+          docker build \
             --build-arg VITE_API_BASE_URL=https://${{ env.DOMAIN_API }} \
             --tag ${{ secrets.CR_SERVER }}/${{ env.CR_ORG }}/log-center-web:latest \
             -f ./web/Dockerfile \
             ./web 2>&1 | tee /tmp/build-web.log
+          docker push ${{ secrets.CR_SERVER }}/${{ env.CR_ORG }}/log-center-web:latest 2>&1 | tee -a /tmp/build-web.log
 
       # Build K8s Monitor Image
       - name: Build and Push K8s Monitor
         id: build-monitor
         run: |
           set -o pipefail
-          docker buildx build \
-            --push \
-            --provenance=false \
+          docker build \
             --tag ${{ secrets.CR_SERVER }}/${{ env.CR_ORG }}/k8s-pod-monitor:latest \
             -f ./k8s-monitor/Dockerfile \
             ./k8s-monitor 2>&1 | tee /tmp/build-monitor.log
+          docker push ${{ secrets.CR_SERVER }}/${{ env.CR_ORG }}/k8s-pod-monitor:latest 2>&1 | tee -a /tmp/build-monitor.log
 
       - name: Setup Kubectl
         run: |