fix: correct timeframe display in Bot Status for scalping strategies

- Add selectedTimeframes to automation status API response to show actual running timeframes
- Update Bot Status UI to display selectedTimeframes from API instead of local config state
- Fix issue where Bot Status showed '1h' instead of scalping timeframes '5m, 15m, 30m'
- Ensure selectedTimeframes are properly stored in database settings and retrieved in status
- Bot Status now correctly reflects the actual running automation configuration

UI Changes:
- Bot Status timeframes now shows: '5m, 15m, 30m' for scalping instead of '1h'
- Analysis Timer correctly shows 2-minute intervals for scalping strategies
- Status display is now synchronized with actual automation configuration

Backend Changes:
- Store selectedTimeframes in automation session settings
- Include selectedTimeframes in getStatus() API response
- Enhanced interval detection to support settings-based timeframes

app/automation-v2/page.js

@@ -364,7 +364,7 @@ export default function AutomationPageV2() {
                 <div className="p-2 bg-gray-800/30 rounded-lg mb-3">
                   <div className="text-xs text-gray-400">
                     Selected: <span className="text-cyan-400">
-                      {config.selectedTimeframes.map(tf => timeframes.find(t => t.value === tf)?.label).filter(Boolean).join(', ')}
+                      {(status.selectedTimeframes || [status.timeframe]).map(tf => timeframes.find(t => t.value === tf)?.label || tf).filter(Boolean).join(', ')}
                     </span>
                   </div>
                   <div className="text-xs text-gray-500 mt-1">
@@ -499,7 +499,7 @@ export default function AutomationPageV2() {
                 <div className="flex justify-between">
                   <span className="text-gray-300">Timeframes:</span>
                   <span className="text-cyan-400 font-semibold text-xs">
-                    {config.selectedTimeframes.map(tf => timeframes.find(t => t.value === tf)?.label).filter(Boolean).join(', ')}
+                    {(status.selectedTimeframes || [status.timeframe]).map(tf => timeframes.find(t => t.value === tf)?.label || tf).filter(Boolean).join(', ')}
                   </span>
                 </div>
               </div>