⚡️(ci) prebuild drive frontend and serve via nginx for e2e

Replace the per-shard \`yarn dev\` with a single static build
job whose output is shared as an artifact and served by stock
nginx using the production vhost. Cuts e2e startup cost and
exercises the same bundle we ship.

.github/workflows/drive-frontend.yml

@@ -62,9 +62,44 @@ jobs:
           cd src/frontend/apps/drive
           yarn test
 
+  build-frontend-e2e:
+    runs-on: ubuntu-latest
+    needs: install-front
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22.x"
+
+      - name: Restore the frontend cache
+        uses: actions/cache@v4
+        with:
+          path: "src/frontend/**/node_modules"
+          key: front-node_modules-${{ hashFiles('src/frontend/**/yarn.lock') }}
+          fail-on-cache-miss: true
+
+      - name: Build frontend (static export, .env.development)
+        run: |
+          cd src/frontend/apps/drive
+          set -a
+          . ./.env.development
+          set +a
+          yarn build
+
+      - name: Upload frontend bundle
+        uses: actions/upload-artifact@v4
+        with:
+          name: drive-frontend-out
+          path: src/frontend/apps/drive/out
+          retention-days: 1
+          if-no-files-found: error
+
   test-e2e:
     runs-on: ubuntu-latest
-    needs: [install-front, build-mails]
+    needs: [install-front, build-mails, build-frontend-e2e]
     strategy:
       fail-fast: false
       matrix:
@@ -123,18 +158,31 @@ jobs:
           cd src/frontend/apps/e2e
           npx playwright install-deps ${{ matrix.browser }}
 
+      - name: Download frontend bundle
+        uses: actions/download-artifact@v4
+        with:
+          name: drive-frontend-out
+          path: src/frontend/apps/drive/out
+
       - name: Start Docker services
         run: |
           make bootstrap-e2e
 
-      - name: Start frontend
+      - name: Serve frontend (stock nginx + prod vhost)
         run: |
-          cd src/frontend && yarn dev &
+          docker run -d --rm --name drive-static -p 3000:3000 \
+            -v "$PWD/src/frontend/apps/drive/out:/usr/share/nginx/html:ro" \
+            -v "$PWD/src/frontend/apps/drive/conf/default.conf:/etc/nginx/conf.d/default.conf:ro" \
+            nginx:1.25
 
       - name: Wait for Keycloak to be ready
         run: |
           timeout 30 bash -c 'while [[ "$(curl -s -o /dev/null -w ''%{http_code}'' http://localhost:8083/)" != "302" ]]; do echo "Waiting for Keycloak..." && sleep 2; done' && echo "Keycloak is ready!"
 
+      - name: Wait for frontend to be ready
+        run: |
+          timeout 30 bash -c 'while [[ "$(curl -s -o /dev/null -w ''%{http_code}'' http://localhost:3000/)" != "200" ]]; do echo "Waiting for frontend..." && sleep 1; done' && echo "Frontend is ready!"
+
       - name: Run e2e tests
         run: |
           cd src/frontend/apps/e2e