# AI Image Generator Flow

## Setup

1.  **Install Dependencies**:
    ```bash
    npm install
    ```

2.  **Environment Variables**:
    A `.env` file has been created. Ensure the following keys are correct:
    *   `R2_ACCOUNT_ID`: Your Cloudflare Account ID.
    *   `R2_ACCESS_KEY_ID`: Your R2 Access Key ID.
    *   `R2_SECRET_ACCESS_KEY`: Your R2 Secret Access Key.
    *   `R2_BUCKET_NAME`: The name of your R2 bucket (Default: `ai-flow`).
    *   `API_KEY`: Your Wuyin Keji API Key.

3.  **Run Server**:
    ```bash
    node server.js
    ```
    Access at `http://localhost:3000`.

## Features

1.  **Upload**: Uploads reference images to Cloudflare R2.
2.  **Prompt Generation**: Uses LLM to generate prompts based on `prompt.md` template.
3.  **Image Generation**: Uses NanoBanana to generate images from prompts.
4.  **History**: Saves generated images and prompts locally.
5.  **Batch Download**: Download all generated images.

## Notes
*   Ensure your R2 bucket allows public access or configure a custom domain in `.env` as `R2_PUBLIC_DOMAIN`.
*   The application saves state to browser `localStorage` to prevent data loss on refresh.