fix(training): use selected chart and include TA-Lib span sources

src/app/api/training/start/route.ts

@@ -6,6 +6,7 @@ const INFERENCE_API_TIMEOUT = parseInt(process.env.INFERENCE_API_TIMEOUT || '100
 
 const TrainingStartRequestSchema = z.object({
   model_type: z.string().min(1, 'model_type must be a non-empty string'),
+  chart_id: z.number().int().positive().optional(),
 });
 
 export async function POST(request: NextRequest) {

src/app/page.tsx

@@ -856,7 +856,7 @@ export default function Home() {
 
           {/* Training Panel */}
           <div className="px-3 py-2 border-b border-sidebar-border">
-            <TrainingPanel />
+            <TrainingPanel activeChartId={activeChartId} />
           </div>
 
           {/* Predictions */}