Prevent TA panel refresh when changing timeframes

- Removed automatic TA reload when switching timeframes
- TA panel now only loads on initial page load and when manually refreshed
- User must click Refresh button to update TA after timeframe change

src/api/dashboard/static/js/ui/chart.js

@@ -595,7 +595,7 @@ async loadTA() {
         
         this.allData.delete(interval);
         this.loadInitialData();
-        this.loadTA();
+        // Don't reload TA on timeframe switch - let user refresh manually
         
         window.clearSimulationResults?.();
         window.updateTimeframeDisplay?.();