fix: login without selecting INBOX first so conn.list() returns all folders

src/email_client.py

@@ -1,6 +1,7 @@
 import imaplib
 import email
 import logging
+import re
 from email.header import decode_header
 from email.utils import parsedate_to_datetime, parseaddr
 from typing import Optional
@@ -89,7 +90,7 @@ def _select_mailbox(conn, mailbox: str = "INBOX"):
         raise RuntimeError(f"无法选择邮箱 {mailbox}: {data}")
 
 
-def _login_and_prepare(account: EmailAccount, timeout: int = 30):
+def _login_and_prepare(account: EmailAccount, timeout: int = 30, select_inbox: bool = True):
     logger.info("连接 %s:%d (超时%ds)", account.imap_server, account.imap_port, timeout)
     if account.use_ssl:
         conn = imaplib.IMAP4_SSL(account.imap_server, account.imap_port, timeout=timeout)
@@ -102,13 +103,14 @@ def _login_and_prepare(account: EmailAccount, timeout: int = 30):
     if _check_provider(account.username, _PROVIDERS_NEED_ID):
         logger.info("发送 ID 命令 (126/163 兼容)")
         _send_id_command(conn)
-    _select_mailbox(conn)
-    logger.info("已选择 INBOX")
+    if select_inbox:
+        _select_mailbox(conn)
+        logger.info("已选择 INBOX")
     return conn
 
 
 def fetch_unseen_emails(account: EmailAccount) -> list[Email]:
-    conn = _login_and_prepare(account)
+    conn = _login_and_prepare(account, select_inbox=False)
 
     # 列出所有文件夹
     _, folder_data = conn.list()
@@ -117,10 +119,12 @@ def fetch_unseen_emails(account: EmailAccount) -> list[Email]:
         for item in folder_data:
             if item is None:
                 continue
-            parts = item.decode("utf-8", errors="replace").split(' " ')
-            if len(parts) >= 2:
-                folder_name = parts[1].strip('"')
-                folders.append(folder_name)
+            line = item.decode("utf-8", errors="replace")
+            # IMAP LIST 格式: (flags) "delimiter" "folder_name"
+            # 用正则提取最后一个引号内的内容
+            m = re.search(r'"([^"]*)"\s*$', line)
+            if m:
+                folders.append(m.group(1))
     if not folders:
         folders = ["INBOX"]
     logger.info("扫描文件夹: %s", ", ".join(folders))
@@ -182,7 +186,7 @@ def mark_as_seen(account: EmailAccount, uids_with_folder: list[tuple[bytes, str]
     if not uids_with_folder:
         return
     logger.info("标记 %d 封邮件为已读", len(uids_with_folder))
-    conn = _login_and_prepare(account)
+    conn = _login_and_prepare(account, select_inbox=False)
     # 按文件夹分组
     from collections import defaultdict
     by_folder: dict[str, list[bytes]] = defaultdict(list)