fix pred candles viz

ANNOTATE/core/annotation_manager.py

@@ -46,7 +46,7 @@ class TradeAnnotation:
     
     def __post_init__(self):
         if self.created_at is None:
-            self.created_at = datetime.now().isoformat()
+            self.created_at = datetime.now(pytz.UTC).isoformat()
         if self.market_context is None:
             self.market_context = {}
 
@@ -96,7 +96,7 @@ class AnnotationManager:
             # Update metadata
             self.annotations_db["metadata"] = {
                 "total_annotations": len(self.annotations_db["annotations"]),
-                "last_updated": datetime.now().isoformat()
+                "last_updated": datetime.now(pytz.UTC).isoformat()
             }
             
             with open(self.annotations_file, 'w') as f:
@@ -451,7 +451,7 @@ class AnnotationManager:
         export_data = [asdict(ann) for ann in annotations]
         
         # Create export file
-        timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
+        timestamp = datetime.now(pytz.UTC).strftime('%Y%m%d_%H%M%S')
         export_file = self.storage_path / f"export_{timestamp}.{format_type}"
         
         if format_type == 'json':