修复IMAP连接：支持非SSL端口143

- IMAP服务器 111.229.206.54 只开放143端口（非SSL），993不通
- 默认配置改为端口143、ssl=False
- EmailVerifier 增加 use_ssl 参数，支持 IMAP4 和 IMAP4_SSL
- Account 模型增加 email_imap_ssl 字段
- 数据库迁移：新增列 + 修正旧数据端口和SSL设置
- 导入账号时自动填充 ssl 配置

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

web/backend/database.py

@@ -51,6 +51,20 @@ def _migrate():
             conn.execute(text("ALTER TABLE users ADD COLUMN custom_permissions JSON DEFAULT NULL"))
             conn.commit()
 
+        # 检查 accounts.email_imap_ssl 列是否存在
+        result = conn.execute(text("PRAGMA table_info(accounts)"))
+        columns = [row[1] for row in result]
+        if 'email_imap_ssl' not in columns:
+            # 旧数据端口993的默认True（SSL），其他端口默认False
+            conn.execute(text("ALTER TABLE accounts ADD COLUMN email_imap_ssl BOOLEAN DEFAULT 1"))
+            conn.commit()
+            # 修正旧数据中使用 111.229.206.54 的账号：端口改为143，SSL改为False
+            conn.execute(text(
+                "UPDATE accounts SET email_imap_port = 143, email_imap_ssl = 0 "
+                "WHERE email_imap_server = '111.229.206.54'"
+            ))
+            conn.commit()
+
 
 def _seed():
     """写入默认超管账号和角色。"""

web/backend/models.py

@@ -42,6 +42,7 @@ class Account(Base):
     email_password = Column(String(256), nullable=False)
     email_imap_server = Column(String(128), default="")
     email_imap_port = Column(Integer, default=993)
+    email_imap_ssl = Column(Boolean, default=True)
     assigned_to = Column(Integer, ForeignKey("users.id"), nullable=True, index=True)
     tag = Column(String(64), default="")
     remark = Column(String(256), default="")

web/backend/routers/accounts.py

@@ -121,6 +121,7 @@ def import_accounts(
             email_password=email_password,
             email_imap_server=email_cfg['server'],
             email_imap_port=email_cfg.get('port', 993),
+            email_imap_ssl=email_cfg.get('ssl', True),
             tag=tag,
         ))
 

web/backend/services/login_service.py

@@ -122,6 +122,7 @@ class LoginBatchRunner:
                     email_password=acc_info["email_password"],
                     email_imap_server=acc_info["email_imap_server"] or "",
                     email_imap_port=acc_info["email_imap_port"] or 993,
+                    email_imap_ssl=acc_info["email_imap_ssl"],
                 )
 
                 loginer = DouyuLogin(
@@ -205,6 +206,7 @@ class LoginBatchRunner:
                     "email_password": acc.email_password,
                     "email_imap_server": acc.email_imap_server or "",
                     "email_imap_port": acc.email_imap_port or 993,
+                    "email_imap_ssl": acc.email_imap_ssl if acc.email_imap_ssl is not None else True,
                 },
             })