Fix multi-timeframe analysis sync issues

- Ensure analysisInProgress flag is always reset in finally block
- Remove duplicate concurrency flag resets from progress handlers
- Fix inconsistent concurrency protection between single/multi timeframe
- Prevents sync issues when selecting multiple timeframes for analysis

components/AIAnalysisPanel.tsx

@@ -126,7 +126,6 @@ export default function AIAnalysisPanel({ onAnalysisComplete }: AIAnalysisPanelP
           setEventSource(null)
           // Reset UI state when analysis completes
           setLoading(false)
-          analysisInProgress.current = false
           setProgress(null)
         } else if (progressData.type === 'connected') {
           console.log(`🔍 EventSource connected for ${sessionId}`)
@@ -142,7 +141,6 @@ export default function AIAnalysisPanel({ onAnalysisComplete }: AIAnalysisPanelP
               console.log(`🔍 All steps completed for ${sessionId}, resetting UI state`)
               setTimeout(() => {
                 setLoading(false)
-                analysisInProgress.current = false
                 setProgress(null)
                 es.close()
                 setEventSource(null)
@@ -378,7 +376,6 @@ export default function AIAnalysisPanel({ onAnalysisComplete }: AIAnalysisPanelP
       
       // Reset loading state immediately on error
       setLoading(false)
-      analysisInProgress.current = false
       setProgress(null)
       
       // Mark current active step as error
@@ -398,11 +395,11 @@ export default function AIAnalysisPanel({ onAnalysisComplete }: AIAnalysisPanelP
         return prev
       })
     } finally {
-      // Only reset loading for multi-timeframe analysis
+      // Always reset concurrency flag, but only reset loading for multi-timeframe analysis
       // Single timeframe analysis loading state is managed by progress tracking
+      analysisInProgress.current = false
       if (analysisTimeframes.length > 1) {
         setLoading(false)
-        analysisInProgress.current = false
       }
     }
   }