Add Image Upload to Lovable App

Add image upload functionality to my Lovable app using Supabase Storage.

REQUIREMENTS:
1. Create a reusable ImageUpload component with drag-and-drop zone and click-to-browse. Accept images only (jpg, png, webp, gif) with a 5MB size limit.
2. Show an image preview immediately after selection (before upload) using URL.createObjectURL.
3. Compress images client-side before upload using browser-image-compression library. Target max 1MB and 1920px width.
4. Upload to Supabase Storage bucket with progress indicator (percentage bar).
5. Generate a unique filename using UUID to prevent collisions. Organize in folders by date (uploads/2024/03/uuid.jpg).
6. After successful upload, return the public URL and save it to the relevant table column.
7. Support multiple file uploads with a grid preview of selected images.
8. Add error handling for: file too large, wrong format, upload failure, and storage quota exceeded.
9. Include a delete button on uploaded images that removes from both Storage and database.

DATABASE:
- Create Supabase Storage bucket "uploads" with public access for images.
- RLS on storage: authenticated users can upload, anyone can read.

ENVIRONMENT VARIABLES:
- SUPABASE_URL (already set)
- SUPABASE_ANON_KEY (already set)

SECURITY:
- Validate file type server-side, not just client-side.
- Set max file size in Storage bucket policies.
- Use signed URLs for private uploads if needed.