[stable-22.1] ci(translations): Ensure there are no line breaks in strings

.github/workflows/lint-translations.yml

@@ -0,0 +1,39 @@
+# SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
+
+name: Lint translation files
+
+on:
+  pull_request:
+    branches: [ master, main, stable-* ]
+  push:
+    branches: [ master, main, stable-* ]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: lint-php-cs-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest-low
+
+    name: translations-string-xml
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+        with:
+          persist-credentials: false
+
+      - name: Check for new lines in translation strings
+        id: counter
+        run: |
+          grep -P '<string name' app/src/main/res/values/strings.xml | grep -vcP '</string>' | grep '^0$'
+
+      - name: Output
+        if: failure()
+        run: |
+          grep -P '<string name' app/src/main/res/values/strings.xml | grep -vP '</string>'