fix(cd): 安裝 kubectl 到 runner

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/cd.yaml

@@ -83,14 +83,21 @@ jobs:
           echo "${{ secrets.KUBE_CONFIG_PROD }}" | base64 -d > ~/.kube/config
           chmod 600 ~/.kube/config
 
-      - name: Install Kustomize
+      - name: Install kubectl and Kustomize
         run: |
+          mkdir -p $HOME/.local/bin
+          # Install kubectl
+          if ! command -v kubectl &> /dev/null; then
+            curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
+            chmod +x kubectl
+            mv kubectl $HOME/.local/bin/
+          fi
+          # Install kustomize
           if ! command -v kustomize &> /dev/null; then
             curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
-            mkdir -p $HOME/.local/bin
             mv kustomize $HOME/.local/bin/
-            echo "$HOME/.local/bin" >> $GITHUB_PATH
           fi
+          echo "$HOME/.local/bin" >> $GITHUB_PATH
 
       - name: Generate image tag
         id: tag