fix: use manual checkout instead of GitHub Actions

Gitea Actions runner cannot fetch actions from GitHub (connection reset).
Revert to manual git clone for checkout and direct tool installation.

.gitea/workflows/test.yml

@@ -15,17 +15,14 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.12'
+        run: |
+          git clone --depth 1 --branch ${{ github.ref_name }} http://gitea:3000/jimmy/nas-tools.git .
+          git checkout ${{ github.sha }}
 
       - name: Install dependencies
         run: |
           cd dashboard/backend
-          python -m venv venv
+          python3 -m venv venv
           . venv/bin/activate
           pip install -r requirements.txt
           pip install -r requirements-dev.txt
@@ -51,12 +48,14 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        run: |
+          git clone --depth 1 --branch ${{ github.ref_name }} http://gitea:3000/jimmy/nas-tools.git .
+          git checkout ${{ github.sha }}
 
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '20'
+      - name: Install Node.js
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
+          apt-get install -y nodejs
 
       - name: Install dependencies
         run: |