ci: avoid GitHub action downloads

.gitea/workflows/deploy.yml

@@ -28,15 +28,12 @@ jobs:
           --health-retries 20
     steps:
       - name: 检出 main
-        uses: actions/checkout@v4
+        uses: https://gitea.com/actions/checkout@v4
         with:
           ref: main
 
-      - name: 配置 Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.11"
-          cache: pip
+      - name: 显示 Python 版本
+        run: python3 --version
 
       - name: 安装 MySQL 编译依赖
         run: |
@@ -44,31 +41,31 @@ jobs:
           sudo apt-get install -y default-libmysqlclient-dev pkg-config
 
       - name: 安装测试依赖
-        run: pip install -r requirements-dev.txt
+        run: python3 -m pip install -r requirements-dev.txt
 
       - name: 检查迁移文件
         working-directory: backend
-        run: python manage.py makemigrations --check --dry-run
+        run: python3 manage.py makemigrations --check --dry-run
 
       - name: Django 系统检查
         working-directory: backend
-        run: python manage.py check
+        run: python3 manage.py check
 
       - name: ASGI 启动导入检查
         working-directory: backend
-        run: python -c "from config.asgi import application; print(type(application).__name__)"
+        run: python3 -c "from config.asgi import application; print(type(application).__name__)"
 
       - name: 运行测试
-        run: pytest -q
+        run: python3 -m pytest -q
 
       - name: MySQL 迁移与全量测试
         env:
           DATABASE_URL: mysql://root:ci-root-password@mysql:3306/hulumath
         run: |
-          python backend/manage.py check --database default
-          python backend/manage.py check_mysql
-          python backend/manage.py migrate --noinput
-          pytest -q
+          python3 backend/manage.py check --database default
+          python3 backend/manage.py check_mysql
+          python3 backend/manage.py migrate --noinput
+          python3 -m pytest -q
 
   deploy:
     if: ${{ github.event.pull_request.merged == true }}