ci: use GitHub action steps on proxied runner

.gitea/workflows/build-windows-cross-linux.yml

@@ -13,13 +13,13 @@ on:
 
 jobs:
   cross-build-windows:
-    # Gitea act_runner 标签为 9950x；该工作流在 Linux Runner 中交叉编译 Windows x86_64 包。
-    runs-on: 9950x
+    # 使用可访问 GitHub 的 Gitea act_runner（runner-mihomo），可直接拉取 actions/checkout、actions/upload-artifact 等 GitHub Action。
+    runs-on: ubuntu-latest
     container:
       image: fedora:latest
 
     steps:
-      - name: Configure Fedora TUNA mirror
+      - name: Prepare action runtime
         run: |
           set -euo pipefail
           sed -e 's|^metalink=|#metalink=|g' \
@@ -29,23 +29,10 @@ jobs:
             sed -i 's|^enabled=1|enabled=0|g' /etc/yum.repos.d/fedora-cisco-openh264.repo
           fi
           dnf makecache --refresh -y
+          dnf install -y git nodejs
 
       - name: Checkout
-        run: |
-          set -euo pipefail
-          dnf install -y git rsync
-          WORKDIR="$(pwd)"
-          SRC_DIR="$(mktemp -d /tmp/chengnan-source.XXXXXX)"
-          REPO_URL="${GITHUB_SERVER_URL:-https://git.luochen570.cn}/${GITHUB_REPOSITORY}.git"
-          TOKEN="${GITHUB_TOKEN:-}"
-          if [ -n "$TOKEN" ]; then
-            git -c http.extraHeader="Authorization: token ${TOKEN}" \
-              clone --depth 1 --branch "${GITHUB_REF_NAME:-main}" "$REPO_URL" "$SRC_DIR"
-          else
-            git clone --depth 1 --branch "${GITHUB_REF_NAME:-main}" "$REPO_URL" "$SRC_DIR"
-          fi
-          rsync -a --delete "$SRC_DIR/" "$WORKDIR/"
-          rm -rf "$SRC_DIR"
+        uses: actions/checkout@v4
 
       - name: Install cross build dependencies
         run: |
@@ -147,7 +134,19 @@ jobs:
                   raise SystemExit(f'{part} is too large for the current Gitea upload path')
           PY
 
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: chengnan-windows-x86_64-cross
+          path: |
+            dist-windows-cross/chengnan-windows-x86_64-cross.zip
+            dist-windows-cross/chengnan-windows-x86_64-cross.zip.sha256
+            dist-windows-cross/chengnan-windows-x86_64-cross.zip.part-*
+            dist-windows-cross/chengnan-windows-x86_64-cross.zip.parts.sha256
+          if-no-files-found: error
+
       - name: Upload package to Gitea Packages
+        if: ${{ github.event_name != 'pull_request' }}
         env:
           PACKAGE_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
         run: |