fix: drop turbopack, add webpack extensionAlias for SDK .js→.ts resolution

app/next.config.ts

@@ -3,6 +3,15 @@ import type { NextConfig } from 'next'
 const config: NextConfig = {
   reactStrictMode: true,
   transpilePackages: ['@solana/connector', '@solisting/sdk', '@descro/sdk'],
+  webpack(webpackConfig) {
+    // Workspace SDK packages use .js extensions on TypeScript imports (ESM convention)
+    // but have no compiled output — webpack must resolve .js → .ts
+    webpackConfig.resolve.extensionAlias = {
+      '.js': ['.ts', '.tsx', '.js'],
+      '.mjs': ['.mts', '.mjs'],
+    }
+    return webpackConfig
+  },
 }
 
 export default config

app/package.json

@@ -2,7 +2,7 @@
   "name": "solisting-app",
   "private": true,
   "scripts": {
-    "dev": "next dev --turbopack",
+    "dev": "next dev",
     "build": "next build",
     "start": "next start",
     "typecheck": "tsc --noEmit"