fix: 使用 body: '' 获取邮件内容

- 使用 body: '' 替代 rfc822: true，尝试获取完整邮件内容
- 添加多种获取方式的回退逻辑

src/app/api/monitor/scan-emails/route.ts

@@ -208,15 +208,15 @@ async function scanEmails(
         }
 
         try {
-          // 使用 rfc822 获取完整邮件内容（兼容性最好）
-          const msg = await client.fetchOne(uid, { uid: true, rfc822: true }, { uid: true })
+          // 使用 body: '' 获取完整邮件内容
+          const msg = await client.fetchOne(uid, { uid: true, body: '' }, { uid: true })
           if (!msg) {
             console.log(`[Scan] 邮件 ${uid} 获取失败，跳过`)
             continue
           }
 
-          // 优先使用 source，其次使用 rfc822
-          const rawSource = (msg as any).source || (msg as any).rfc822
+          // 尝试多种方式获取邮件内容
+          const rawSource = (msg as any).source || (msg as any).body || (msg as any).rfc822
           if (!rawSource) {
             console.log(`[Scan] 邮件 ${uid} 无内容，跳过 (keys: ${Object.keys(msg).join(',')})`)
             continue