Would the JS checks like to actually work?

Signed-off-by: copilotcoder <copilotcoder@darkhelm.org>

.gitea/workflows/cicd-checks.yaml

@@ -209,6 +209,34 @@ jobs:
               git -C /workspace config core.eol lf &&
               git -C /workspace add -A
             fi &&
+            case "${HOOK}" in
+              eslint|prettier|tsdoc-lint|typescript-check)
+                echo 'JS hook detected; ensuring frontend yarn install state exists' &&
+                cd /workspace/frontend &&
+                if [ ! -f '.yarn/install-state.gz' ]; then
+                  echo 'Missing .yarn/install-state.gz; running yarn install' &&
+                  install_ok=false &&
+                  for i in 1 2 3; do
+                    echo 'yarn install attempt' "$i"'/3' &&
+                    if timeout 1200 corepack yarn install --immutable --mode=skip-build; then
+                      install_ok=true
+                      break
+                    fi
+                    if [ "$i" -lt 3 ]; then
+                      echo 'yarn install failed; cleaning and retrying in 20s' &&
+                      rm -rf node_modules .yarn/install-state.gz .yarn/cache &&
+                      corepack yarn cache clean --all 2>/dev/null || true &&
+                      sleep 20
+                    fi
+                  done &&
+                  if [ "$install_ok" != 'true' ]; then
+                    echo '❌ Unable to prepare frontend dependencies for JS pre-commit hooks' &&
+                    exit 1
+                  fi
+                fi &&
+                cd /workspace
+                ;;
+            esac &&
             /workspace/backend/.venv/bin/pre-commit run ${HOOK} --all-files --show-diff-on-failure
           "