Upload latest code and optimized prompts (v6)

README.md

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+# 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.