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
- 修复缺失的urllib.parse导入

backend/test_multimodal.py

@@ -19,18 +19,21 @@ print("\n1. 测试模块导入...")
 
 try:
     from multimodal_processor import get_multimodal_processor
+
     print("   ✓ multimodal_processor 导入成功")
 except ImportError as e:
     print(f"   ✗ multimodal_processor 导入失败: {e}")
 
 try:
     from image_processor import get_image_processor
+
     print("   ✓ image_processor 导入成功")
 except ImportError as e:
     print(f"   ✗ image_processor 导入失败: {e}")
 
 try:
     from multimodal_entity_linker import get_multimodal_entity_linker
+
     print("   ✓ multimodal_entity_linker 导入成功")
 except ImportError as e:
     print(f"   ✗ multimodal_entity_linker 导入失败: {e}")
@@ -110,7 +113,7 @@ try:
     for dir_name, dir_path in [
         ("视频", processor.video_dir),
         ("帧", processor.frames_dir),
-        ("音频", processor.audio_dir)
+        ("音频", processor.audio_dir),
     ]:
         if os.path.exists(dir_path):
             print(f"   ✓ {dir_name}目录存在: {dir_path}")
@@ -125,11 +128,12 @@ print("\n6. 测试数据库多模态方法...")
 
 try:
     from db_manager import get_db_manager
+
     db = get_db_manager()
 
     # 检查多模态表是否存在
     conn = db.get_conn()
-    tables = ['videos', 'video_frames', 'images', 'multimodal_mentions', 'multimodal_entity_links']
+    tables = ["videos", "video_frames", "images", "multimodal_mentions", "multimodal_entity_links"]
 
     for table in tables:
         try: