Added insert policy

Good, the insert policy is live. Now let me add the Toaster to the layout and add a navigation link to the create page from the navbar:

Good, I have full context. The form and page look correct. Now I need to:

1. Move the Toaster to the root layout so it's available on all pages
2. Add a "สร้าง Campaign" link in the navbar
3. Also remove the debug console.log statements from campaign-grid now that the form is working

Now remove the duplicate Toaster from the create page:

Now add a "สร้าง Campaign" link to the navbar:

Now clean up the debug logs from campaign-grid since we've confirmed the data exists:

The Create Campaign form is now fully wired. I added a dark-themed Toaster (sonner) to the root layout so toast notifications work on every page, added a glowing cyan "สร้าง Campaign" button with a PlusCircle icon to the navbar for easy access, removed the duplicate Toaster from the create page, and cleaned up the debug console.log statements from campaign-grid. The form at /campaign/create validates all required fields with pink error highlights, submits to Supabase via the browser client, shows success/error toasts, and redirects to the homepage on success.

Checked Supabase schema

I now have full context. I need to:

1. Create a Supabase Storage bucket called "thumbnails" with a public read policy
2. Add a thumbnail_url column to the campaigns table
3. Replace the gradient picker section in the form with a thumbnail image upload
4. Update the Campaign type, card, and info components to show the uploaded image

Let me start with the database changes:

Loaded Supabase tools

Loaded execute_sql