ci-frontend.yml

# Frontend CI — install (frozen lockfile), lint (ESLint flat config), build.
# The committed pnpm-lock.yaml makes installs reproducible; the built SPA is
# uploaded as an artifact so a reviewer can download exactly what CI produced.
name: Frontend CI

on:
  push:
    branches: [master]
    paths:
      - 'frontend/**'
      - '.github/workflows/ci-frontend.yml'
  pull_request:
    paths:
      - 'frontend/**'
      - '.github/workflows/ci-frontend.yml'
  workflow_dispatch:

permissions:
  contents: read

concurrency:
  group: frontend-ci-${{ github.ref }}
  cancel-in-progress: true

defaults:
  run:
    working-directory: frontend

jobs:
  build:
    name: Lint & build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Set up pnpm
        # action-setup runs from the repo root, where there is no package.json,
        # so it can't read "packageManager" from frontend/package.json — pin the
        # version explicitly (keep in sync with frontend/package.json).
        uses: pnpm/action-setup@v4
        with:
          version: 9.12.0
      - name: Set up Node
        uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: pnpm
          cache-dependency-path: frontend/pnpm-lock.yaml
      - name: Install dependencies
        run: pnpm install --frozen-lockfile
      - name: ESLint
        run: pnpm run lint
      - name: Production build
        run: pnpm run build
      - name: Upload built SPA
        uses: actions/upload-artifact@v4
        with:
          name: frontend-dist
          path: frontend/dist
          retention-days: 7