ci: GitHub Actions 三平台自动构建流水线

- .github/workflows/build-engine.yml: push tag v*.*.* 触发
  windows-latest / macos-latest / ubuntu-latest 三平台并行构建
  构建完成后自动创建 GitHub Release 并上传三个二进制附件
- testpilot_engine.spec: 改用 sysconfig.get_path('purelib')
  跨平台获取 site-packages，兼容 Windows/macOS/Linux 路径差异

Author: zcj220

.github/workflows/build-engine.yml

@@ -0,0 +1,116 @@
+name: Build Engine
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'        # 触发：推送 v1.2.3 格式的 tag
+  workflow_dispatch:    # 允许手动触发（调试用）
+
+permissions:
+  contents: write       # 允许创建 Release 并上传附件
+
+jobs:
+  build:
+    name: Build (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: windows-latest
+            artifact_name: testpilot-engine-windows.exe
+            exe_path: dist/testpilot-engine.exe
+          - os: macos-latest
+            artifact_name: testpilot-engine-macos
+            exe_path: dist/testpilot-engine
+          - os: ubuntu-latest
+            artifact_name: testpilot-engine-linux
+            exe_path: dist/testpilot-engine
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+
+      - name: Install Poetry
+        uses: snok/install-poetry@v1
+        with:
+          version: '1.8.5'
+          virtualenvs-create: true
+          virtualenvs-in-project: true
+
+      - name: Cache Poetry venv
+        uses: actions/cache@v4
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-py310-${{ hashFiles('poetry.lock') }}
+          restore-keys: |
+            venv-${{ runner.os }}-py310-
+
+      - name: Install dependencies
+        run: poetry install --no-interaction --no-root
+
+      - name: Install Playwright browsers
+        run: poetry run playwright install chromium
+
+      - name: Install PyInstaller
+        run: poetry run pip install pyinstaller --quiet
+
+      - name: Build with PyInstaller
+        run: poetry run pyinstaller testpilot_engine.spec --clean --noconfirm
+
+      - name: Rename artifact (Windows)
+        if: matrix.os == 'windows-latest'
+        run: mv dist/testpilot-engine.exe dist/${{ matrix.artifact_name }}
+        shell: bash
+
+      - name: Rename artifact (macOS/Linux)
+        if: matrix.os != 'windows-latest'
+        run: mv dist/testpilot-engine dist/${{ matrix.artifact_name }}
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact_name }}
+          path: dist/${{ matrix.artifact_name }}
+          retention-days: 7
+
+  release:
+    name: Create Release
+    needs: build
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts/
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          name: TestPilot Engine ${{ github.ref_name }}
+          body: |
+            ## TestPilot AI 引擎 ${{ github.ref_name }}
+
+            下载对应平台的引擎文件，放到任意目录后双击运行即可。
+            无需安装 Python、Node.js 或任何依赖。
+
+            | 平台 | 文件 | 说明 |
+            |------|------|------|
+            | Windows | `testpilot-engine-windows.exe` | 双击运行 |
+            | macOS | `testpilot-engine-macos` | `chmod +x` 后运行 |
+            | Linux | `testpilot-engine-linux` | `chmod +x` 后运行 |
+
+            引擎启动后在 `http://127.0.0.1:8900` 提供服务，VS Code 插件会自动连接。
+          files: |
+            artifacts/testpilot-engine-windows.exe/testpilot-engine-windows.exe
+            artifacts/testpilot-engine-macos/testpilot-engine-macos
+            artifacts/testpilot-engine-linux/testpilot-engine-linux
+          draft: false
+          prerelease: false

testpilot_engine.spec

@@ -10,7 +10,12 @@ from pathlib import Path
 
 # ── 基本路径 ──────────────────────────────────────────────────
 project_dir = Path(SPECPATH)
-venv_site_packages = project_dir / '.venv' / 'lib' / 'site-packages'
+
+# 跨平台查找 site-packages：
+#   Windows: .venv/lib/site-packages
+#   macOS/Linux: .venv/lib/python3.x/site-packages
+import sysconfig
+venv_site_packages = Path(sysconfig.get_path('purelib'))
 
 # ── 需要随二进制一起携带的数据目录 ────────────────────────────
 datas = [