fix(dashboard-next): add public dir, fix WalletButton SSR with dynamic import

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Alexis

dashboard-next/components/layout/Header.tsx

@@ -1,9 +1,11 @@
 'use client'
 import { useState } from 'react'
+import dynamic from 'next/dynamic'
 import { useDashboard } from '@/context/DashboardContext'
-import { WalletButton } from '@/components/wallet/WalletButton'
 import { TOKEN } from '@/lib/calculations'
 
+const WalletButton = dynamic(() => import('@/components/wallet/WalletButton').then(m => m.WalletButton), { ssr: false })
+
 export function Header() {
   const { loading, lastUpdated, refresh } = useDashboard()
   const [copied, setCopied] = useState(false)

dashboard-next/public/.gitkeep

@@ -0,0 +1 @@
+