removed cancel request

src/core/providers/base_provider.py

@@ -4,29 +4,17 @@ from typing import Any, Callable, Dict, List, Optional
 
 class Loader(ABC):
     """Abstract base class for anime data loaders/providers."""
-
     @abstractmethod
-    def request_cancel(self) -> None:
-        """Request cancellation of any ongoing download.
-        
-        Sets an internal flag that downloads should check periodically
-        and abort if set. This enables graceful shutdown.
+    def subscribe_download_progress(self, handler):
+        """Subscribe a handler to the download_progress event.
+        Args:
+            handler: Callable to be called with progress dict.
         """
-
     @abstractmethod
-    def reset_cancel(self) -> None:
-        """Reset the cancellation flag.
-        
-        Should be called before starting a new download to ensure
-        it's not immediately cancelled.
-        """
-
-    @abstractmethod
-    def is_cancelled(self) -> bool:
-        """Check if cancellation has been requested.
-        
-        Returns:
-            bool: True if cancellation was requested
+    def unsubscribe_download_progress(self, handler):
+        """Unsubscribe a handler from the download_progress event.
+        Args:
+            handler: Callable previously subscribed.
         """
 
     @abstractmethod