Add tablet seller wizard and access controls

src/components/theme-toggle.tsx

@@ -0,0 +1,22 @@
+'use client'
+
+import { useTheme } from 'next-themes'
+import { Moon, Sun } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+
+export function ThemeToggle() {
+  const { resolvedTheme, setTheme } = useTheme()
+  const isDark = resolvedTheme === 'dark'
+
+  return (
+    <Button
+      variant="ghost"
+      size="icon"
+      onClick={() => setTheme(isDark ? 'light' : 'dark')}
+      title={isDark ? 'Mode clair' : 'Mode sombre'}
+      aria-label={isDark ? 'Activer le mode clair' : 'Activer le mode sombre'}
+    >
+      {isDark ? <Sun className="h-4 w-4" /> : <Moon className="h-4 w-4" />}
+    </Button>
+  )
+}