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

backend/db_manager.py

@@ -17,7 +17,6 @@ DB_PATH = os.getenv("DB_PATH", "/app/data/insightflow.db")
 # Constants
 UUID_LENGTH = 8  # UUID 截断长度
 
-
 @dataclass
 class Project:
     id: str
@@ -26,7 +25,6 @@ class Project:
     created_at: str = ""
     updated_at: str = ""
 
-
 @dataclass
 class Entity:
     id: str
@@ -47,7 +45,6 @@ class Entity:
         if self.attributes is None:
             self.attributes = {}
 
-
 @dataclass
 class AttributeTemplate:
     """属性模板定义"""
@@ -68,7 +65,6 @@ class AttributeTemplate:
         if self.options is None:
             self.options = []
 
-
 @dataclass
 class EntityAttribute:
     """实体属性值"""
@@ -89,7 +85,6 @@ class EntityAttribute:
         if self.options is None:
             self.options = []
 
-
 @dataclass
 class AttributeHistory:
     """属性变更历史"""
@@ -103,7 +98,6 @@ class AttributeHistory:
     changed_at: str = ""
     change_reason: str = ""
 
-
 @dataclass
 class EntityMention:
     id: str
@@ -114,7 +108,6 @@ class EntityMention:
     text_snippet: str
     confidence: float = 1.0
 
-
 class DatabaseManager:
     def __init__(self, db_path: str = DB_PATH):
         self.db_path = db_path
@@ -1401,11 +1394,9 @@ class DatabaseManager:
         conn.close()
         return stats
 
-
 # Singleton instance
 _db_manager = None
 
-
 def get_db_manager() -> DatabaseManager:
     global _db_manager
     if _db_manager is None:

backend/llm_client.py

@@ -15,13 +15,11 @@ import httpx
 KIMI_API_KEY = os.getenv("KIMI_API_KEY", "")
 KIMI_BASE_URL = os.getenv("KIMI_BASE_URL", "https://api.kimi.com/coding")
 
-
 @dataclass
 class ChatMessage:
     role: str
     content: str
 
-
 @dataclass
 class EntityExtractionResult:
     name: str
@@ -29,7 +27,6 @@ class EntityExtractionResult:
     definition: str
     confidence: float
 
-
 @dataclass
 class RelationExtractionResult:
     source: str
@@ -37,7 +34,6 @@ class RelationExtractionResult:
     type: str
     confidence: float
 
-
 class LLMClient:
     """Kimi API 客户端"""
 
@@ -258,11 +254,9 @@ class LLMClient:
         messages = [ChatMessage(role="user", content=prompt)]
         return await self.chat(messages, temperature=0.3)
 
-
 # Singleton instance
 _llm_client = None
 
-
 def get_llm_client() -> LLMClient:
     global _llm_client
     if _llm_client is None:

backend/rate_limiter.py

@@ -12,7 +12,6 @@ from collections.abc import Callable
 from dataclasses import dataclass
 from functools import wraps
 
-
 @dataclass
 class RateLimitConfig:
     """限流配置"""
@@ -21,7 +20,6 @@ class RateLimitConfig:
     burst_size: int = 10  # 突发请求数
     window_size: int = 60  # 窗口大小（秒）
 
-
 @dataclass
 class RateLimitInfo:
     """限流信息"""
@@ -31,7 +29,6 @@ class RateLimitInfo:
     reset_time: int  # 重置时间戳
     retry_after: int  # 需要等待的秒数
 
-
 class SlidingWindowCounter:
     """滑动窗口计数器"""
 
@@ -63,7 +60,6 @@ class SlidingWindowCounter:
         for k in old_keys:
             self.requests.pop(k, None)
 
-
 class RateLimiter:
     """API 限流器"""
 
@@ -159,11 +155,9 @@ class RateLimiter:
             self.counters.clear()
             self.configs.clear()
 
-
 # 全局限流器实例
 _rate_limiter: RateLimiter | None = None
 
-
 def get_rate_limiter() -> RateLimiter:
     """获取限流器实例"""
     global _rate_limiter
@@ -173,7 +167,6 @@ def get_rate_limiter() -> RateLimiter:
 
 # 限流装饰器（用于函数级别限流）
 
-
 def rate_limit(requests_per_minute: int = 60, key_func: Callable | None = None) -> None:
     """
     限流装饰器
@@ -216,6 +209,5 @@ def rate_limit(requests_per_minute: int = 60, key_func: Callable | None = None)
 
     return decorator
 
-
 class RateLimitExceeded(Exception):
     """限流异常"""

backend/tingwu_client.py

@@ -8,7 +8,6 @@ import time
 from datetime import datetime
 from typing import Any
 
-
 class TingwuClient:
     def __init__(self):
         self.access_key = os.getenv("ALI_ACCESS_KEY", "")