feat: Add persistent settings and multiple layouts support

- Add settings manager to persist symbol, timeframe, and layouts
- Support multiple layouts for comprehensive chart analysis
- Remove debug screenshots for cleaner logs
- Update AI analysis with professional trading prompt
- Add multi-screenshot analysis for better trading insights
- Update analyze API to use saved settings and multiple layouts

app/api/screenshot/route.ts

@@ -0,0 +1,15 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { tradingViewCapture } from '../../../lib/tradingview'
+
+export async function POST(req: NextRequest) {
+  try {
+    const { symbol, filename } = await req.json()
+    if (!symbol || !filename) {
+      return NextResponse.json({ error: 'Missing symbol or filename' }, { status: 400 })
+    }
+    const filePath = await tradingViewCapture.capture(symbol, filename)
+    return NextResponse.json({ filePath })
+  } catch (e: any) {
+    return NextResponse.json({ error: e.message }, { status: 500 })
+  }
+}