fix: ampel ci unbound variable GITHUB_SHA

.gitea/workflows/ampel-ci.yml

@@ -47,21 +47,23 @@ jobs:
                 echo "== Frontend: Push nach release-dist =="
                 git config --global user.name "Gitea Actions"
                 git config --global user.email "actions@gitea.local"
+                CURRENT_COMMIT=$(git rev-parse HEAD)
                 # Erzeuge (oder hole) den orphan branch 'release-dist'
                 git checkout --orphan release-dist 2>/dev/null || git checkout release-dist
                 git rm -rf . >/dev/null 2>&1 || true
+                
                 # Checkout nur frontend/dist vom aktuellen Stand
-                git checkout $GITHUB_SHA -- frontend/dist
+                git add -f frontend/dist
-                git add frontend/dist
+                
                 if ! git diff-index --quiet HEAD; then
-                  git commit -m "Automatischer Frontend Build ($GITHUB_SHA) [skip ci]"
+                  git commit -m "Automatischer Frontend Build ($CURRENT_COMMIT) [skip ci]"
                   # Push to release-dist. Token auth from runner is expected to work for Gitea Actions.
                   git push origin HEAD:release-dist -f
                 else
                   echo "Keine Änderungen am Frontend-Build."
                 fi
                 # Zurück zum originalen Branch für den Rest des Skripts
-                git checkout $GITHUB_SHA
+                git checkout $CURRENT_COMMIT
               fi
             fi
           fi