Create a sign-up form. The sign-up must include the following:

• Collect email and password
• Collect user age
• Add toggle switch to subscribe to newsletter
• Validate form input using Zod

I'll create a modern sign-up form with email, password, age fields, newsletter subscription toggle, and Zod validation. The form will have a clean design with proper error handling and user feedback through toast notifications.

Analyze the following errors and fix them:

• components/signup-form.svelte:4:22: ERROR: Could not resolve "sonner"

I'll fix the import error by updating the toast import to use the correct "svelte-sonner" package instead of "sonner".