# Frontend - Kirana AI (React + Vite)

React 19 + Vite + Tailwind CSS v4 single-page app for browsing the catalog,
running semantic search, chatting with the RAG assistant, and (on
`/admin`) triggering ingestion of new brands.

Full setup steps are in the project documentation (`../docs/`). This file
is a fast local reference.

## Quick start

### One-click (Windows)

Double-click **`start_frontend.bat`**. It checks whether the backend is
reachable on port 8000 (just a warning, not a blocker) and starts the
Vite dev server.

### Manual

```bash
cd frontend
npm install
npm run dev
```

Open http://localhost:5173 - the Vite dev server proxies `/api/*` to
`http://localhost:8000` automatically (see `vite.config.js`), so make
sure the backend is running there first (`../backend/README.md`,
`../backend/start_backend.bat`).

If your backend runs somewhere else, set `VITE_API_BASE_URL` in a local
`.env` file (copy `.env.example`) instead of relying on the proxy.

## Production build

```bash
npm run build      # outputs to dist/
npm run preview    # serve the production build locally to sanity-check it
```

## Pages

- `/` - Browse & Search (sidebar brand/category filters, product grid,
  semantic search bar) with a toggle to **Ask AI**, a conversational RAG
  chat panel that cites which catalog products it used for each answer.
- `/admin` - Trigger ingestion of a new brand and watch job status.

## Structure

```
src/
├── api/client.js          # fetch wrapper for every backend endpoint
├── components/
│   ├── Sidebar.jsx / TopBar.jsx
│   ├── ProductCard.jsx / ProductGrid.jsx / ProductModal.jsx
│   ├── ChatPanel.jsx / ChatMessage.jsx
│   └── Atoms.jsx           # Spinner, EmptyState
├── pages/
│   ├── HomePage.jsx
│   └── AdminPage.jsx
├── App.jsx                 # routes
├── main.jsx
└── index.css                # Tailwind v4 theme tokens ("Kirana Ledger" palette)
```