feat(core): 支持已注册账号自动登录流程

- 在 Account 模型添加 source 字段区分账号来源
- 注册引擎检测到已注册账号时自动切换到登录流程
- 已注册账号跳过密码设置和账户创建步骤
- 优化注册表单响应解析逻辑

src/config/constants.py

@@ -66,6 +66,12 @@ OPENAI_API_ENDPOINTS = {
     "select_workspace": "https://auth.openai.com/api/accounts/workspace/select",
 }
 
+# OpenAI 页面类型（用于判断账号状态）
+OPENAI_PAGE_TYPES = {
+    "EMAIL_OTP_VERIFICATION": "email_otp_verification",  # 已注册账号，需要 OTP 验证
+    "PASSWORD_REGISTRATION": "password",  # 新账号，需要设置密码
+}
+
 # ============================================================================
 # 邮箱服务相关常量
 # ============================================================================

src/database/crud.py

@@ -30,7 +30,8 @@ def create_account(
     proxy_used: Optional[str] = None,
     expires_at: Optional['datetime'] = None,
     extra_data: Optional[Dict[str, Any]] = None,
-    status: Optional[str] = None
+    status: Optional[str] = None,
+    source: Optional[str] = None
 ) -> Account:
     """创建新账户"""
     db_account = Account(
@@ -49,6 +50,7 @@ def create_account(
         expires_at=expires_at,
         extra_data=extra_data or {},
         status=status or 'active',
+        source=source or 'register',
         registered_at=datetime.utcnow()
     )
     db.add(db_account)

src/database/session.py

@@ -94,6 +94,7 @@ class DatabaseSessionManager:
             # (表名, 列名, 列类型)
             ("accounts", "cpa_uploaded", "BOOLEAN DEFAULT 0"),
             ("accounts", "cpa_uploaded_at", "DATETIME"),
+            ("accounts", "source", "VARCHAR(20) DEFAULT 'register'"),
         ]
 
         with self.engine.connect() as conn: