Optimize LoRA scanning and caching with asynchronous improvements

- Implement asynchronous directory scanning with concurrent tasks
- Add fallback mechanism for uninitialized cache
- Improve error handling and logging during file processing
- Enhance file scanning with safer async recursive traversal

lora_manager.py

@@ -5,6 +5,7 @@ from .routes.lora_routes import LoraRoutes
 from .routes.api_routes import ApiRoutes
 from .services.lora_scanner import LoraScanner
 from .services.file_monitor import LoraFileMonitor
+from .services.lora_cache import LoraCache
 
 class LoraManager:
     """Main entry point for LoRA Manager plugin"""
@@ -45,8 +46,8 @@ class LoraManager:
     async def _schedule_cache_init(cls, scanner: LoraScanner):
         """Schedule cache initialization in the running event loop"""
         try:
-            # Create the initialization task
-            asyncio.create_task(cls._initialize_cache(scanner))
+            # 创建低优先级的初始化任务
+            asyncio.create_task(cls._initialize_cache(scanner), name='lora_cache_init')
         except Exception as e:
             print(f"LoRA Manager: Error scheduling cache initialization: {e}")
     
@@ -54,6 +55,15 @@ class LoraManager:
     async def _initialize_cache(cls, scanner: LoraScanner):
         """Initialize cache in background"""
         try:
+            # 设置初始缓存占位
+            scanner._cache = LoraCache(
+                raw_data=[],
+                sorted_by_name=[],
+                sorted_by_date=[],
+                folders=[]
+            )
+            
+            # 分阶段加载缓存
             await scanner.get_cached_data(force_refresh=True)
             print("LoRA Manager: Cache initialization completed")
         except Exception as e: