ci: vendor micro:bit payload + build workflow (ROOT=/scratch/, upload artifact)

.github/workflows/ci.yml

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+name: Build
+
+# 触发：组织仓库的两个主分支 push + 手动（fork/PR 运行只做质检不上传，令牌只读）
+on:
+  push:
+    branches: [develop, codex/editor-backend-integration]
+  workflow_dispatch:
+
+env:
+  GH_PROXY: https://v4.gh-proxy.org
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    # npm ci（依赖树庞大）+ webpack 4 全量构建，runner 较慢，放宽超时
+    timeout-minutes: 60
+    steps:
+      - uses: https://gitea.com/actions/checkout@v4
+
+      # 1. 手动安装 Node（runner 没有 hostedtoolcache，与 Backend/Frontend CI 同款）
+      - name: Setup Node.js manually
+        run: |
+          NODE_VERSION="22.23.3"
+          NODE_HASH="35947643734"
+          echo "Downloading Node.js v${NODE_VERSION} via proxy..."
+          curl -fL "${GH_PROXY}/https://github.com/actions/node-versions/releases/download/${NODE_VERSION}-${NODE_HASH}/node-${NODE_VERSION}-linux-x64.tar.gz" -o node.tar.gz
+          sudo mkdir -p /opt/hostedtoolcache/node/${NODE_VERSION}/x64
+          sudo tar -zxvf node.tar.gz -C /opt/hostedtoolcache/node/${NODE_VERSION}/x64 --strip-components=1
+          echo "/opt/hostedtoolcache/node/${NODE_VERSION}/x64/bin" >> "$GITHUB_PATH"
+          /opt/hostedtoolcache/node/${NODE_VERSION}/x64/bin/node -v
+          /opt/hostedtoolcache/node/${NODE_VERSION}/x64/bin/npm -v
+
+      # 2. npm 镜像
+      - name: Configure npm mirror
+        run: npm config set registry https://registry.npmmirror.com
+
+      - name: Install dependencies
+        run: npm ci
+
+      # 3. micro:bit 包载入（生成物已提交入库则跳过；回退到脚本在线下载走 cross-fetch）
+      - name: Get micro:bit payload
+        run: |
+          if [ -f src/generated/microbit-hex-url.cjs ] && [ -f static/microbit/scratch-microbit-1.2.0.hex ]; then
+            echo "生成物已入库，跳过下载"
+          else
+            npm run prepublish
+          fi
+
+      # 4. 编辑器单元测试（Lint 跳过：menu-bar 存在既有的 24 项 lint 问题）
+      - name: Unit tests (sccn)
+        run: npx jest --runInBand test/unit/sccn test/unit/reducers/project-state-reducer.test.js
+
+      # 5. 生产构建：Webpack 4 需要 legacy OpenSSL；ROOT 决定部署子路径
+      - name: Build editor (ROOT=/scratch/)
+        env:
+          NODE_ENV: production
+          ROOT: /scratch/
+          NODE_OPTIONS: --openssl-legacy-provider
+        run: npm run build
+
+      # 6. 打包 build/（顶层无子目录，解压后直接是一组站点文件：editor.html、getter.js 等）
+      - name: Package build
+        run: |
+          set -eu
+          test -f build/editor.html
+          TARBALL="scratch-gui-build-${GITHUB_SHA::7}.tar.gz"
+          tar -czf "$TARBALL" -C build .
+          echo "--- 包内清单（前 20 行）---"
+          tar -tzf "$TARBALL" | head -20
+          echo "--- 大小 ---"
+          ls -lh "$TARBALL"
+
+      # 7. 上传为 Gitea Actions Artifact（push / 手动触发才上传）
+      - name: Upload build artifact
+        if: github.event_name != 'pull_request'
+        uses: https://gitea.com/actions/upload-artifact@v4
+        with:
+          name: scratch-gui-build-${{ github.sha }}
+          path: scratch-gui-build-*.tar.gz
+          retention-days: 30

src/generated/microbit-hex-url.cjs

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+// This file is generated by scripts/prepublish.mjs
+// Do not edit this file directly
+// This file relies on a loader to turn this `require` into a URL
+module.exports = require('../static/microbit/scratch-microbit-1.2.0.hex');
+