ci: libgl1 e libglib2.0-0 per opencv nel runner (#1)

Fixes #1

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -18,6 +18,13 @@ jobs:
           curl -LsSf https://astral.sh/uv/install.sh | sh
           echo "$HOME/.local/bin" >> "$GITHUB_PATH"
 
+      - name: Librerie di sistema per opencv
+        # #1: opencv-python (non headless: pm2d/gui.py usa imshow) vuole libGL e glib
+        run: |
+          SUDO=$(command -v sudo || true)
+          $SUDO apt-get update -qq
+          $SUDO apt-get install -y -qq libgl1 libglib2.0-0
+
       - name: Sync dipendenze
         run: uv sync