feat: add daily request limit and refactor access control (#759)

- Add daily request limit per IP in blacklist settings (1-1,000,000/day)
- Refactor access control logic: merge blacklist and rate limit checks
- Remove RATE_LIMIT_API_DAILY_REQUESTS env var, use database config instead
- Move x-custom-auth check earlier in middleware chain
- Add comprehensive English documentation (31 new guide pages)
- Improve code structure and error handling

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

vitepress-docs/docs/en/guide/feature/telegram.md

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+# Configure Telegram Bot
+
+Try it here: [@cf_temp_mail_bot](https://t.me/cf_temp_mail_bot)
+
+::: warning Note
+The default `worker.dev` domain certificate for worker is not supported by Telegram. Please use a custom domain when configuring Telegram Bot.
+:::
+
+> [!NOTE]
+> If you want to use Telegram Bot, please bind `KV` first
+>
+> If you don't need Telegram Bot, you can skip this step
+>
+> If you want Telegram to have stronger email parsing capabilities, refer to [Configure worker to use wasm for email parsing](/en/guide/feature/mail_parser_wasm_worker)
+
+## Telegram Bot Configuration
+
+Please first create a Telegram Bot, obtain the `token`, then execute the following command to add the `token` to secrets
+
+> [!NOTE]
+> If you find it troublesome, you can also put it in plain text under `[vars]` in `wrangler.toml`, but this is not recommended
+
+If you deployed via UI, you can add it under `Variables and Secrets` in the Cloudflare UI interface
+
+```bash
+# Switch to worker directory
+cd worker
+pnpm wrangler secret put TELEGRAM_BOT_TOKEN
+```
+
+## Bot
+
+- Can set whitelist users
+- Click `Initialize` to complete the configuration.
+- Click `View Status` to check the current configuration status.
+
+![telegram](/feature/telegram.png)
+
+## Mini App
+
+Can be deployed via command line or UI interface
+
+### UI Deployment
+
+For other steps, refer to `Frontend and Backend Separation Deployment` in [UI Deployment](/en/guide/cli/pages)
+
+> [!NOTE]
+> Download the zip from here, [telegram-frontend.zip](https://github.com/dreamhunter2333/cloudflare_temp_email/releases/latest/download/telegram-frontend.zip)
+>
+> Modify the index-xxx.js file in the zip, where xx is a random string
+>
+> Search for `https://temp-email-api.xxx.xxx`, replace it with your worker domain, then deploy the new zip file
+
+### Command Line Deployment
+
+```bash
+cd frontend
+pnpm install
+cp .env.example .env.prod
+# --project-name can create a separate pages for mini app, you can also share one pages, but may encounter js loading issues
+pnpm run deploy:telegram --project-name=<your_project_name>
+```
+
+- After deployment, please fill in the web URL in the `Settings` -> `Telegram Mini App` page `Telegram Mini App URL` in the admin backend.
+- Please execute `/setmenubutton` in `@BotFather`, then enter your web address to set the `Open App` button in the lower left corner.
+- Please execute `/newapp` in `@BotFather` to create a new app and register the mini app.