docs: add cloudflare chat storage binding notes

README.md

@@ -38,6 +38,15 @@ bun dev
 bun run build
 ```
 
+## Chat Storage on Cloudflare
+
+Create the following bindings in Cloudflare Pages for this project:
+
+- `CHAT_DB`: D1 database binding for chat messages.
+- `CHAT_IMAGES`: R2 bucket binding for chat image uploads.
+
+The chat API auto-creates the `chat_messages` table and index on first request.
+
 ## Release Instructions
 
 - Submit code to the `dev` branch.

README_cn.md

@@ -38,6 +38,15 @@ bun dev
 bun run build
 ```
 
+## Cloudflare 聊天存储配置
+
+请在 Cloudflare Pages 中为该项目绑定以下资源：
+
+- `CHAT_DB`：用于聊天消息存储的 D1 数据库。
+- `CHAT_IMAGES`：用于聊天图片上传的 R2 Bucket。
+
+聊天 API 会在首次请求时自动创建 `chat_messages` 表和索引。
+
 ## 发布说明
 
 - 提交代码到 `dev` 分支。