Performance — image optimization pipeline

[raggopaluni]

Description

Optimize images before storage for fast load on all phones.

On admin upload:

1. Resize to max 800x800px
2. Convert to WebP
3. Compress to under 100KB
4. Store in Supabase storage
5. Serve via Supabase CDN

Libraries: browser-image-compression (React), Supabase storage transform.

Acceptance Criteria

• No product image over 100KB
• Images load under 1 second on 4G
• WebP format used
• Fallback to JPG on older browsers
• Admin sees preview before save

Dependencies

Issue #10