fix: log level setting not taking effect after restart

- Import setup_logger in program.py and reapply log configuration after settings load
- Modify setup_logger to properly handle reconfiguration by updating existing handlers
- Ensure debug logging works correctly after restart when debug_enable is set

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: shinonomeow

backend/src/module/conf/log.py

@@ -19,16 +19,30 @@ def setup_logger(level: int = logging.INFO, reset: bool = False):
     logging.addLevelName(logging.WARNING, "WARNING:")
     LOGGING_FORMAT = "[%(asctime)s] %(levelname)-8s %(message)s"
     TIME_FORMAT = "%Y-%m-%d %H:%M:%S"
-    logging.basicConfig(
-        level=level,
-        format=LOGGING_FORMAT,
-        datefmt=TIME_FORMAT,
-        encoding="utf-8",
-        handlers=[
-            logging.FileHandler(LOG_PATH, encoding="utf-8"),
-            logging.StreamHandler(),
-        ],
-    )
+    
+    # 获取根日志器
+    root_logger = logging.getLogger()
+    
+    # 如果已经有处理器且不是重置模式，则更新现有配置
+    if root_logger.handlers and not reset:
+        # 更新根日志器的等级
+        root_logger.setLevel(level)
+        # 更新所有处理器的等级
+        for handler in root_logger.handlers:
+            handler.setLevel(level)
+    else:
+        # 首次配置或重置模式，使用 basicConfig
+        logging.basicConfig(
+            level=level,
+            format=LOGGING_FORMAT,
+            datefmt=TIME_FORMAT,
+            encoding="utf-8",
+            handlers=[
+                logging.FileHandler(LOG_PATH, encoding="utf-8"),
+                logging.StreamHandler(),
+            ],
+            force=reset,  # 强制重新配置如果是重置模式
+        )
     loggers_to_silence = [
         "httpx",
         "httpcore",

backend/src/module/core/program.py

@@ -1,6 +1,6 @@
 import logging
 
-from module.conf import VERSION, settings
+from module.conf import VERSION, settings, setup_logger
 
 from .aiocore import app_core
 from .status import ProgramStatus
@@ -56,6 +56,10 @@ async def start(self):
         logger.debug("[Program] loading settings...")
         settings.load()
         logger.debug("[Program] settings loaded.")
+        logger.debug("[Program] applying log configuration...")
+        # 重新应用日志配置以反映设置更改
+        setup_logger(level=logging.DEBUG if settings.log.debug_enable else logging.INFO)
+        logger.debug("[Program] log configuration applied.")
         logger.debug("[Program] starting application core...")
         await self.app_core.initialize()
         await self.app_core.start()