diff --git a/bot.py b/bot.py
index 4cdb54ede..aeec5d0d6 100644
--- a/bot.py
+++ b/bot.py
@@ -296,8 +296,10 @@ class DatabaseManager:
             # 使用线程执行器运行潜在的阻塞操作
             await initialize_sql_database()
             elapsed_time = time.time() - start_time
+            
+            db_type = global_config.database.database_type if global_config else "unknown"
             logger.info(
-                f"数据库连接初始化成功，使用 {global_config.database.database_type} 数据库，耗时: {elapsed_time:.2f}秒"
+                f"数据库连接初始化成功，使用 {db_type} 数据库，耗时: {elapsed_time:.2f}秒"
             )
 
             return self
@@ -321,6 +323,10 @@ class ConfigurationValidator:
         try:
             from src.config.config import global_config
 
+            if global_config is None:
+                logger.error("全局配置未初始化")
+                return False
+
             # 检查必要的配置节
             required_sections = ["database", "bot"]
             for section in required_sections:
diff --git a/src/__init__.py b/src/__init__.py
index 907af17a3..0ac0c9576 100644
--- a/src/__init__.py
+++ b/src/__init__.py
@@ -8,7 +8,7 @@ from src.common.logger import get_logger
 egg = get_logger("小彩蛋")
 
 
-def weighted_choice(data: Sequence[str], weights: list[float] | None = None) -> str:
+def weighted_choice(data: Sequence[str], weights: Sequence[float] | None = None) -> str:
     """
     从 data 中按权重随机返回一条。
     若 weights 为 None，则所有元素权重默认为 1。
diff --git a/src/main.py b/src/main.py
index c5132f957..a6c437cea 100644
--- a/src/main.py
+++ b/src/main.py
@@ -7,7 +7,7 @@ import time
 import traceback
 from collections.abc import Callable, Coroutine
 from random import choices
-from typing import Any
+from typing import Any, cast
 
 from rich.traceback import install
 
@@ -172,6 +172,9 @@ class MainSystem:
                         logger.warning(f"{calc_name} 不是 BaseInterestCalculator 的有效子类")
                         continue
 
+                    # 显式转换类型以修复 Pyright 错误
+                    component_class = cast(type[BaseInterestCalculator], component_class)
+
                     # 创建组件实例
                     calculator_instance = component_class()