feat(telegram): 新增 Telegram 机器人通知与快捷审核功能

- 新增 Telegram 通知功能，支持通过机器人接收新评论通知
- 在 Telegram 消息中提供“批准”和“删除”按钮，支持快捷审核
- 新增后台 Telegram 设置页面，支持配置 Bot Token、Chat ID 和开关
- 新增 `/api/telegram/webhook` 端点处理按钮回调
- 更新邮件通知逻辑，统一使用评论设置中的 `adminEmail` 作为收件人
- 更新相关文档，包括功能说明和 API 文档

cwd-api/src/api/telegram/webhook.ts

@@ -0,0 +1,54 @@
+import { Context } from 'hono';
+import { Bindings } from '../../bindings';
+import { loadTelegramSettings, editMessageText, answerCallbackQuery } from '../../utils/telegram';
+
+export const telegramWebhook = async (c: Context<{ Bindings: Bindings }>) => {
+	try {
+		const settings = await loadTelegramSettings(c.env);
+		if (!settings.botToken) {
+			return c.text('Bot token not configured', 400);
+		}
+
+		const update = await c.req.json();
+		const { callback_query } = update;
+
+		if (callback_query) {
+			await handleCallbackQuery(c, settings.botToken, callback_query);
+		}
+
+		return c.text('OK');
+	} catch (e: any) {
+		console.error('Telegram Webhook Error:', e);
+		return c.text('Internal Server Error', 500);
+	}
+};
+
+async function handleCallbackQuery(c: Context<{ Bindings: Bindings }>, token: string, query: any) {
+	const { data, message, id } = query;
+	const chatId = message.chat.id;
+	const messageId = message.message_id;
+
+	if (!data) return;
+
+	const [action, commentIdStr] = data.split(':');
+	const commentId = parseInt(commentIdStr);
+
+	if (isNaN(commentId)) {
+		await answerCallbackQuery(token, id, 'Invalid Comment ID');
+		return;
+	}
+
+	if (action === 'approve') {
+		await c.env.CWD_DB.prepare('UPDATE Comment SET status = ? WHERE id = ?').bind('approved', commentId).run();
+
+		const newText = message.text + '\n\n✅ 已批准 (Approved)';
+		await editMessageText(token, chatId, messageId, newText);
+		await answerCallbackQuery(token, id, '评论已批准');
+	} else if (action === 'delete') {
+		await c.env.CWD_DB.prepare('DELETE FROM Comment WHERE id = ?').bind(commentId).run();
+
+		const newText = message.text + '\n\n🗑️ 已删除 (Deleted)';
+		await editMessageText(token, chatId, messageId, newText);
+		await answerCallbackQuery(token, id, '评论已删除');
+	}
+}