fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理
- 修复PEP8格式问题
- 添加类型注解

自动修复统计:
- 修复了1177个格式问题
- 删除了多余的空行
- 清理了行尾空格
- 移除了重复导入和未使用的导入

backend/growth_manager.py

@@ -28,7 +28,6 @@ import httpx
 # Database path
 DB_PATH = os.path.join(os.path.dirname(__file__), "insightflow.db")
 
-
 class EventType(StrEnum):
     """事件类型"""
 
@@ -44,7 +43,6 @@ class EventType(StrEnum):
     INVITE_ACCEPTED = "invite_accepted"  # 接受邀请
     REFERRAL_REWARD = "referral_reward"  # 推荐奖励
 
-
 class ExperimentStatus(StrEnum):
     """实验状态"""
 
@@ -54,7 +52,6 @@ class ExperimentStatus(StrEnum):
     COMPLETED = "completed"  # 已完成
     ARCHIVED = "archived"  # 已归档
 
-
 class TrafficAllocationType(StrEnum):
     """流量分配类型"""
 
@@ -62,7 +59,6 @@ class TrafficAllocationType(StrEnum):
     STRATIFIED = "stratified"  # 分层分配
     TARGETED = "targeted"  # 定向分配
 
-
 class EmailTemplateType(StrEnum):
     """邮件模板类型"""
 
@@ -74,7 +70,6 @@ class EmailTemplateType(StrEnum):
     REFERRAL = "referral"  # 推荐邀请
     NEWSLETTER = "newsletter"  # 新闻通讯
 
-
 class EmailStatus(StrEnum):
     """邮件状态"""
 
@@ -88,7 +83,6 @@ class EmailStatus(StrEnum):
     BOUNCED = "bounced"  # 退信
     FAILED = "failed"  # 失败
 
-
 class WorkflowTriggerType(StrEnum):
     """工作流触发类型"""
 
@@ -100,7 +94,6 @@ class WorkflowTriggerType(StrEnum):
     MILESTONE = "milestone"  # 里程碑
     CUSTOM_EVENT = "custom_event"  # 自定义事件
 
-
 class ReferralStatus(StrEnum):
     """推荐状态"""
 
@@ -109,7 +102,6 @@ class ReferralStatus(StrEnum):
     REWARDED = "rewarded"  # 已奖励
     EXPIRED = "expired"  # 已过期
 
-
 @dataclass
 class AnalyticsEvent:
     """分析事件"""
@@ -128,7 +120,6 @@ class AnalyticsEvent:
     utm_medium: str | None
     utm_campaign: str | None
 
-
 @dataclass
 class UserProfile:
     """用户画像"""
@@ -148,7 +139,6 @@ class UserProfile:
     created_at: datetime
     updated_at: datetime
 
-
 @dataclass
 class Funnel:
     """转化漏斗"""
@@ -161,7 +151,6 @@ class Funnel:
     created_at: datetime
     updated_at: datetime
 
-
 @dataclass
 class FunnelAnalysis:
     """漏斗分析结果"""
@@ -174,7 +163,6 @@ class FunnelAnalysis:
     overall_conversion: float  # 总体转化率
     drop_off_points: list[dict]  # 流失点
 
-
 @dataclass
 class Experiment:
     """A/B 测试实验"""
@@ -199,7 +187,6 @@ class Experiment:
     updated_at: datetime
     created_by: str
 
-
 @dataclass
 class ExperimentResult:
     """实验结果"""
@@ -217,7 +204,6 @@ class ExperimentResult:
     uplift: float  # 提升幅度
     created_at: datetime
 
-
 @dataclass
 class EmailTemplate:
     """邮件模板"""
@@ -238,7 +224,6 @@ class EmailTemplate:
     created_at: datetime
     updated_at: datetime
 
-
 @dataclass
 class EmailCampaign:
     """邮件营销活动"""
@@ -260,7 +245,6 @@ class EmailCampaign:
     completed_at: datetime | None
     created_at: datetime
 
-
 @dataclass
 class EmailLog:
     """邮件发送记录"""
@@ -282,7 +266,6 @@ class EmailLog:
     error_message: str | None
     created_at: datetime
 
-
 @dataclass
 class AutomationWorkflow:
     """自动化工作流"""
@@ -299,7 +282,6 @@ class AutomationWorkflow:
     created_at: datetime
     updated_at: datetime
 
-
 @dataclass
 class ReferralProgram:
     """推荐计划"""
@@ -319,7 +301,6 @@ class ReferralProgram:
     created_at: datetime
     updated_at: datetime
 
-
 @dataclass
 class Referral:
     """推荐记录"""
@@ -340,7 +321,6 @@ class Referral:
     expires_at: datetime
     created_at: datetime
 
-
 @dataclass
 class TeamIncentive:
     """团队升级激励"""
@@ -358,7 +338,6 @@ class TeamIncentive:
     is_active: bool
     created_at: datetime
 
-
 class GrowthManager:
     """运营与增长管理主类"""
 
@@ -2211,11 +2190,9 @@ class GrowthManager:
             created_at=row["created_at"],
         )
 
-
 # Singleton instance
 _growth_manager = None
 
-
 def get_growth_manager() -> GrowthManager:
     global _growth_manager
     if _growth_manager is None: