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.

config/constants/chart_constants.py

@@ -0,0 +1,33 @@
+# Plotly Chart Colors
+CHART_COLORS = {
+    "primary_line": "#2196f3",  # Blue
+    "secondary_line": "#ff9800",  # Orange
+    "increasing_candle": "#26a69a",  # Green
+    "decreasing_candle": "#ef5350",  # Red
+    "neutral_line": "gray"
+}
+
+# UI Text Constants
+UI_TEXT = {
+    "no_data_available": "No data available",
+    "error_prefix": "Error: ",
+    "volume_analysis_title": "{symbol} Volume Analysis ({timeframe})",
+    "price_movement_title": "{symbol} Price Movement Analysis ({timeframe})",
+    "price_action_subplot": "Price Action",
+    "volume_analysis_subplot": "Volume Analysis",
+    "volume_ma_subplot": "Volume vs Moving Average",
+    "cumulative_returns_subplot": "Cumulative Returns",
+    "period_returns_subplot": "Period Returns (%)",
+    "price_range_subplot": "Price Range (%)",
+    "price_yaxis": "Price",
+    "volume_yaxis": "Volume",
+    "cumulative_return_yaxis": "Cumulative Return",
+    "returns_yaxis": "Returns (%)",
+    "range_yaxis": "Range (%)",
+    "price_trace_name": "Price",
+    "volume_trace_name": "Volume",
+    "volume_ma_trace_name": "Volume MA(20)",
+    "cumulative_return_trace_name": "Cumulative Return",
+    "returns_trace_name": "Returns (%)",
+    "range_trace_name": "Range %"
+}