diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index ae41022..a5100b3 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -620,7 +620,7 @@
       <workItem from="1747299661166" duration="4649000" />
       <workItem from="1747311432043" duration="2883000" />
       <workItem from="1747380029603" duration="10381000" />
-      <workItem from="1747403732304" duration="980000" />
+      <workItem from="1747403732304" duration="6270000" />
     </task>
     <servers />
   </component>
@@ -628,7 +628,7 @@
     <option name="version" value="3" />
   </component>
   <component name="com.intellij.coverage.CoverageDataManagerImpl">
-    <SUITE FILE_PATH="coverage/filetranslate$app_test__1_.coverage" NAME="app_test (1) 覆盖结果" MODIFIED="1747404483499" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/tests" />
+    <SUITE FILE_PATH="coverage/filetranslate$app_test__1_.coverage" NAME="app_test (1) 覆盖结果" MODIFIED="1747441337057" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/tests" />
     <SUITE FILE_PATH="coverage/filetranslate$test.coverage" NAME="test 覆盖结果" MODIFIED="1747301959211" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/tests" />
     <SUITE FILE_PATH="coverage/filetranslate$convert.coverage" NAME="convert 覆盖结果" MODIFIED="1746963490689" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/docutranslate/utils" />
     <SUITE FILE_PATH="coverage/PDFtranslate$PDFtranslater__1_.coverage" NAME="PDFtranslater (1) 覆盖结果" MODIFIED="1746633258205" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/pdftranslate_packages" />
diff --git a/docutranslate/app.py b/docutranslate/app.py
index 5baa3be..c4ffbc4 100644
--- a/docutranslate/app.py
+++ b/docutranslate/app.py
@@ -775,21 +775,21 @@ class QueueAndHistoryHandler(logging.Handler):
 async def startup_event():
     app.state.main_event_loop = asyncio.get_running_loop()
 
-    # Clear ALL existing handlers (not just checking if any exist)
+    # 清除所有现有的处理器
     for handler in translater_logger.handlers[:]:
         translater_logger.removeHandler(handler)
 
-    # Configure the new handler
+    # 配置新的处理器
     queue_handler = QueueAndHistoryHandler(log_queue, log_history, MAX_LOG_HISTORY)
     queue_handler.setLevel(logging.INFO)
     queue_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
 
-    # Add the handler and configure the logger
+    # 添加处理器并配置日志记录器
     translater_logger.addHandler(queue_handler)
-    translater_logger.propagate = False
+    translater_logger.propagate = False  # 这一点很重要，防止日志重复
     translater_logger.setLevel(logging.INFO)
 
-    # Clear the log history for a fresh start
+    # 清空日志历史，重新开始
     log_history.clear()
 
     translater_logger.info("应用启动完成，日志队列/历史处理器已正确配置。")
diff --git a/docutranslate/utils/convert.py b/docutranslate/utils/convert.py
index 5bfb16b..902f8ff 100644
--- a/docutranslate/utils/convert.py
+++ b/docutranslate/utils/convert.py
@@ -1,4 +1,3 @@
-import asyncio
 import os
 from huggingface_hub.errors import LocalEntryNotFoundError
 from docling.datamodel.base_models import InputFormat