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

lib/prisma.ts

@@ -0,0 +1,13 @@
+import { PrismaClient } from '@prisma/client'
+
+declare global {
+  var prisma: PrismaClient | undefined
+}
+
+const prisma = globalThis.prisma || new PrismaClient()
+
+if (process.env.NODE_ENV !== 'production') {
+  globalThis.prisma = prisma
+}
+
+export default prisma