UI building as a separate step.

.github/workflows/build-ui.yaml

@@ -0,0 +1,20 @@
+name: buildUi
+
+on:
+  workflow_call:
+  paths-ignore:
+    - 'backend/**'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/pnpm-node-install
+        name: Install Node, pnpm and dependencies.
+        with:
+          node-version: 22.7.0
+          pnpm-version: 9.7.0
+          pnpm-install-args: --no-frozen-lockfile
+      - name: Build UI
+        run: pnpm run buildUi

.github/workflows/ci.yaml

@@ -21,10 +21,13 @@ jobs:
   lint-ui:
     uses: ./.github/workflows/lint-ui.yaml
     secrets: inherit
+  build-ui:
+    uses: ./.github/workflows/build-ui.yaml
+    secrets: inherit
   ci:
     runs-on: ubuntu-latest
     name: Run CI
-    needs: [mypy, pytest, e2e-tests, lint-ui]
+    needs: [mypy, pytest, e2e-tests, lint-ui, build-ui]
     steps:
       - name: 'Done'
         run: echo "Done"