Retry WebUI release dependency installs in CI

.gitea/workflows/module-matrix.yml

@@ -43,6 +43,16 @@ jobs:
           node -e "const fs=require('fs'); const pkg=JSON.parse(fs.readFileSync('package.json')); const rel=JSON.parse(fs.readFileSync('package.release.json')); for (const key of ['dependencies','devDependencies','peerDependencies','optionalDependencies','overrides']) if (rel[key]) pkg[key]=rel[key]; fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2) + '\n');"
           rm -f package-lock.json
           npm cache clean --force
-          npm install --prefer-online
+          for attempt in 1 2 3; do
+            if npm install --prefer-online; then
+              break
+            fi
+            status=$?
+            if [ "$attempt" = 3 ]; then
+              exit "$status"
+            fi
+            sleep $((attempt * 10))
+            npm cache clean --force
+          done
       - name: Run module matrix and contract tests
         run: bash scripts/check-module-matrix.sh