🔒 Implement concurrency protection and remove marketing text

- Add analysisInProgress useRef to prevent multiple simultaneous analyses
- Protect all analysis entry points (performAnalysis, quickAnalyze, etc.)
- Update button disabled state to include concurrency check
- Remove marketing text from analysis page and AIAnalysisPanel
- Fix remaining TypeScript compilation errors in chart components
- Ensure clean UI without promotional content

Fixes sync issues caused by overlapping analysis sessions

app/simple-test/page.tsx

@@ -38,7 +38,7 @@ export default function SimpleTest() {
         setStatus('Chart created')
         
         // Add series
-        const series = chart.addCandlestickSeries({
+        const series = (chart as any).addCandlestickSeries({
           upColor: '#00ff00',
           downColor: '#ff0000',
         })