Remove deprecated app_new.py and consolidate main application logic into main.py

- Deleted `app_new.py`, which was previously the main entry point for the dashboard application, to streamline the codebase.
- Consolidated the application initialization and callback registration logic into `main.py`, enhancing modularity and maintainability.
- Updated the logging and error handling practices in `main.py` to ensure consistent application behavior and improved debugging capabilities.

These changes simplify the application structure, aligning with project standards for modularity and maintainability.

data/common/aggregation/utils.py

@@ -7,6 +7,7 @@ and trade data aggregation.
 
 import re
 from typing import List, Tuple
+from utils.timeframe_utils import load_timeframe_options
 
 from ..data_types import StandardizedTrade, OHLCVCandle
 
@@ -42,7 +43,7 @@ def validate_timeframe(timeframe: str) -> bool:
     Returns:
         True if supported, False otherwise
     """
-    supported = ['1s', '5s', '10s', '15s', '30s', '1m', '5m', '15m', '30m', '1h', '4h', '1d']
+    supported = [item['value'] for item in load_timeframe_options()]
     return timeframe in supported