feat: 添加Telegram Bot通知功能

✨ 新功能:
- 添加Telegram Bot通知支持
- 账目记录自动推送到Telegram
- 支持多个Bot配置管理
- 支持群组和个人通知

📊 数据库:
- 新增telegram_notification_configs表
- 存储Bot配置和通知类型

🔧 后端API:
- GET /api/telegram/notifications - 获取所有配置
- POST /api/telegram/notifications - 创建配置
- PUT /api/telegram/notifications/:id - 更新配置
- DELETE /api/telegram/notifications/:id - 删除配置
- POST /api/telegram/test - 测试Bot配置

💬 通知功能:
- 自动发送账目记录通知
- 包含交易类型、金额、分类、账户等信息
- 支持格式化显示(类型图标、状态标识)
- 配置创建时自动测试有效性

📝 文档:
- 添加完整的使用说明文档
- API接口说明和示例
- 常见问题解答

apps/backend/api/telegram/notifications.post.ts

@@ -0,0 +1,55 @@
+import { readBody } from 'h3';
+import db from '~/utils/sqlite';
+import { useResponseError, useResponseSuccess } from '~/utils/response';
+import { testTelegramConfig } from '~/utils/telegram-bot';
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody(event);
+
+  if (!body?.name || !body?.botToken || !body?.chatId) {
+    return useResponseError('缺少必填字段', -1);
+  }
+
+  const notificationTypes = Array.isArray(body.notificationTypes)
+    ? body.notificationTypes
+    : ['transaction'];
+
+  // 测试配置是否有效
+  const testResult = await testTelegramConfig(body.botToken, body.chatId);
+  if (!testResult.success) {
+    return useResponseError(
+      `Telegram配置测试失败: ${testResult.error}`,
+      -1,
+    );
+  }
+
+  const now = new Date().toISOString();
+
+  const result = db
+    .prepare<unknown, [string, string, string, string, number, string, string]>(
+      `
+      INSERT INTO telegram_notification_configs (name, bot_token, chat_id, notification_types, is_enabled, created_at, updated_at)
+      VALUES (?, ?, ?, ?, ?, ?, ?)
+    `,
+    )
+    .run(
+      body.name,
+      body.botToken,
+      body.chatId,
+      JSON.stringify(notificationTypes),
+      body.isEnabled !== false ? 1 : 0,
+      now,
+      now,
+    );
+
+  return useResponseSuccess({
+    id: result.lastInsertRowid,
+    name: body.name,
+    botToken: body.botToken,
+    chatId: body.chatId,
+    notificationTypes,
+    isEnabled: body.isEnabled !== false,
+    createdAt: now,
+    updatedAt: now,
+  });
+});