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/screenshots/[filename]/route.ts

@@ -0,0 +1,22 @@
+import { NextRequest, NextResponse } from 'next/server'
+import fs from 'fs/promises'
+import path from 'path'
+
+export async function GET(
+  request: NextRequest,
+  context: any
+) {
+  try {
+    const screenshotsDir = path.join(process.cwd(), 'screenshots')
+    const filePath = path.join(screenshotsDir, context.params.filename)
+    const file = await fs.readFile(filePath)
+    return new NextResponse(file, {
+      headers: {
+        'Content-Type': 'image/png',
+        'Content-Disposition': `inline; filename="${context.params.filename}"`
+      }
+    })
+  } catch (e: any) {
+    return NextResponse.json({ error: e.message }, { status: 404 })
+  }
+}