phase 16: React dashboard with full platform control and analytics

.github/workflows/build.yml

@@ -88,3 +88,35 @@ jobs:
             SERVICE_CMD=${{ matrix.service.cmd }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+  build-dashboard:
+    needs: lint-and-test
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push dashboard
+        uses: docker/build-push-action@v6
+        with:
+          context: frontend
+          file: frontend/Dockerfile
+          push: true
+          tags: |
+            ${{ env.IMAGE_BASE }}/dashboard:${{ github.sha }}
+            ${{ env.IMAGE_BASE }}/dashboard:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max