diff --git a/bot.py b/bot.py
index c50f939c..dcd2a3e1 100644
--- a/bot.py
+++ b/bot.py
@@ -12,8 +12,6 @@ from src.common.logger_manager import get_logger
 
 # from src.common.logger import LogConfig, CONFIRM_STYLE_CONFIG
 from src.common.crash_logger import install_crash_handler
-from src.main import MainSystem
-
 from src.main import MainSystem
 from src.plugins.group_nickname.nickname_processor import start_nickname_processor, stop_nickname_processor # <--- 添加这行导入
 import atexit
diff --git a/src/config/config.py b/src/config/config.py
index 6c4e3bb4..c3cae240 100644
--- a/src/config/config.py
+++ b/src/config/config.py
@@ -1,7 +1,7 @@
 import os
 import re
 from dataclasses import dataclass, field
-from typing import Dict, List, Optional, Tuple, Any
+from typing import Dict, List, Optional, Any
 from dateutil import tz
 
 import tomli
diff --git a/src/plugins/group_nickname/nickname_processor.py b/src/plugins/group_nickname/nickname_processor.py
index fc5944ab..df68fb78 100644
--- a/src/plugins/group_nickname/nickname_processor.py
+++ b/src/plugins/group_nickname/nickname_processor.py
@@ -4,37 +4,18 @@ import asyncio
 import traceback
 import threading
 import queue
-from typing import Dict, Optional, Any
+from typing import Dict, Optional
 
-# 数据库和日志导入
-from pymongo import MongoClient
 from pymongo.errors import OperationFailure, DuplicateKeyError # 引入 DuplicateKeyError
 from src.common.logger_manager import get_logger
 from src.common.database import db # 使用全局 db
+from .nickname_mapper import analyze_chat_for_nicknames
+from src.config.config import global_config
 
 logger = get_logger("nickname_processor")
 
-# --- 恢复导入全局 config ---
-try:
-    from src.config.config import global_config # <--- 直接导入全局配置
-except ImportError:
-    logger.critical("无法导入 global_config！")
-    # 提供一个默认的回退配置对象，如果 global_config 导入失败
-    class FallbackConfig:
-        ENABLE_NICKNAME_MAPPING = False
-        NICKNAME_QUEUE_MAX_SIZE = 100
-        NICKNAME_PROCESS_SLEEP_INTERVAL = 0.5
-    global_config = FallbackConfig()
-# ---------------------------
-
-# 绰号分析函数导入
-from .nickname_mapper import analyze_chat_for_nicknames
-
-# --- 使用 threading.Event ---
 _stop_event = threading.Event()
-# --------------------------
 
-# --- 数据库更新逻辑 (使用全局 db) - 修复 Race Condition 版 ---
 async def update_nickname_counts(platform: str, group_id: str, nickname_map: Dict[str, str]):
     """
     更新数据库中用户的群组绰号计数 (使用全局 db)。
@@ -100,7 +81,7 @@ async def update_nickname_counts(platform: str, group_id: str, nickname_map: Dic
 
             # 可选日志：记录是否创建了新文档
             if upsert_result.upserted_id:
-                 logger.debug(f"Upsert on person_id created new document: {person_id}")
+                logger.debug(f"Upsert on person_id created new document: {person_id}")
             # else:
             #    logger.debug(f"Upsert on person_id found existing document: {person_id}")
 
@@ -157,16 +138,16 @@ async def update_nickname_counts(platform: str, group_id: str, nickname_map: Dic
                         }
                     )
                     if update_result_push_group.modified_count > 0:
-                         logger.debug(f"为 person_id {person_id} 添加了新的群组 {group_id_str} 和绰号 '{nickname}'")
+                        logger.debug(f"为 person_id {person_id} 添加了新的群组 {group_id_str} 和绰号 '{nickname}'")
 
         except DuplicateKeyError as dk_err:
             # 这个错误理论上不应该再由步骤 2 的 upsert 触发。
             # 如果仍然出现，可能指示 person_id 生成逻辑问题或非常罕见的 MongoDB 内部情况。
             logger.error(f"数据库操作失败 (DuplicateKeyError): person_id {person_id}. 错误: {dk_err}. 这不应该发生，请检查 person_id 生成逻辑和数据库状态。")
         except OperationFailure as op_err:
-            logger.exception(f"数据库操作失败 (OperationFailure): 用户 {user_id_str}, 群组 {group_id_str}, 绰号 {nickname}")
+            logger.exception(f"数据库操作失败 (OperationFailure): 用户 {user_id_str}, 群组 {group_id_str}, 绰号 {nickname}({op_err})")
         except Exception as e:
-            logger.exception(f"更新用户 {user_id_str} 的绰号 '{nickname}' 时发生意外错误")
+            logger.exception(f"更新用户 {user_id_str} 的绰号 '{nickname}' 时发生意外错误：{e}")
 
 
 # --- 使用 queue.Queue ---
@@ -254,7 +235,8 @@ def _run_processor_thread(q: queue.Queue, stop_event: threading.Event):
                     all_tasks = asyncio.all_tasks(loop)
                     if all_tasks:
                         logger.info(f"(Thread ID: {thread_id}) Cancelling {len(all_tasks)} running tasks...")
-                        for task in all_tasks: task.cancel()
+                        for task in all_tasks:
+                            task.cancel()
                         loop.run_until_complete(asyncio.gather(*all_tasks, return_exceptions=True))
                         logger.info(f"(Thread ID: {thread_id}) All tasks cancelled.")
                     loop.stop()