feat: centralize npm build workflow

.github/workflows/npm-build.yml

@@ -0,0 +1,115 @@
+# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+# SPDX-License-Identifier: MIT
+
+name: Build Javascript
+
+on:
+  workflow_call:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: node-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  changes:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: read
+    outputs:
+      src: ${{ steps.changes.outputs.src }}
+    steps:
+      - name: Detect frontend changes
+        id: changes
+        uses: dorny/paths-filter@ceb8a2b8f2d89434be7ff52d3de7ec3738c5cc9d # v4.0.3
+        continue-on-error: true
+        with:
+          filters: |
+            src:
+              - '.github/workflows/**'
+              - 'src/**'
+              - 'appinfo/info.xml'
+              - 'package.json'
+              - 'package-lock.json'
+              - 'tsconfig.json'
+              - '**.js'
+              - '**.ts'
+              - '**.vue'
+
+  build:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: needs.changes.outputs.src != 'false'
+    name: NPM build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Read package.json node and npm engines version
+        id: versions
+        uses: skjnldsv/read-package-engines-version-actions@06d6baf7d8f41934ab630e97d9e6c0bc9c9ac5e4 # v3
+        with:
+          fallbackNode: '^24'
+          fallbackNpm: '^11.3'
+
+      - name: Set up node ${{ steps.versions.outputs.nodeVersion }}
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: ${{ steps.versions.outputs.nodeVersion }}
+
+      - name: Enforce package engine requirements
+        run: |
+          npm --version
+          npm config set engine-strict true
+
+      - name: Validate package-lock.json
+        run: |
+          npm exec --yes --package=npm-package-lock-add-resolved@1.1.4 -- npm-package-lock-add-resolved
+          git --no-pager diff --exit-code
+
+      - name: Install dependencies and build
+        env:
+          CYPRESS_INSTALL_BINARY: 0
+          PUPPETEER_SKIP_DOWNLOAD: true
+        run: |
+          npm ci
+          npm run build --if-present
+
+      - name: Check build changes
+        run: |
+          if [ -n "$(git status --porcelain)" ]; then
+            echo 'Please recompile and commit the assets. See the "Show changes on failure" step for details.'
+            exit 1
+          fi
+
+      - name: Show changes on failure
+        if: failure()
+        run: |
+          git status
+          git --no-pager diff
+          exit 1
+
+  summary:
+    permissions:
+      contents: none
+    runs-on: ubuntu-latest
+    needs:
+      - changes
+      - build
+    if: always()
+    name: node
+    steps:
+      - name: Summary status
+        env:
+          CHANGED: ${{ needs.changes.outputs.src }}
+          BUILD_RESULT: ${{ needs.build.result }}
+        run: |
+          if [ "$CHANGED" != "false" ] && [ "$BUILD_RESULT" != "success" ]; then
+            exit 1
+          fi

workflow-templates/npm-build.properties.json

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+{
+  "name": "Frontend build",
+  "description": "Install frontend dependencies, validate the lockfile, build assets and check for uncommitted build changes.",
+  "iconName": "octicon package",
+  "categories": [
+    "JavaScript"
+  ],
+  "filePatterns": [
+    "^package.json$"
+  ]
+}

workflow-templates/npm-build.properties.json.license

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+SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

workflow-templates/npm-build.yml

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+# SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# This workflow is published through the LibreCode organization catalog.
+# Implementation: LibreCodeCoop/github-workflows
+
+name: Build Javascript
+
+on: pull_request
+
+permissions:
+  contents: read
+
+jobs:
+  npm-build:
+    uses: LibreCodeCoop/github-workflows/.github/workflows/npm-build.yml@bab6f01a48474e6b00feb71882be2f4dafe928fc