feat: generate blur data async on the backend

[cybervoid0]

generate blur data async on the backend

[Copilot]

Pull Request Overview

This PR migrates blur data generation from synchronous client-side processing to asynchronous server-side processing using Sharp library for better performance and user experience.

• Removed client-side getThumbnailBase64 function and moved blur generation to server
• Implemented new server-side blur data generation using Sharp with async processing via Next.js after() function
• Updated all image creation workflows to use the new async blur data generation pattern

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
utils/index.ts	Removed export of deprecated getThumbnailBase64 function
utils/images.ts	Removed client-side getThumbnailBase64 function implementation
server/images/blur.ts	New server-side blur data generation using Sharp library
server/images/actions.ts	Added async blur data creation workflow with database updates
scripts/tunnel.ts	Increased tunnel establishment timeout from 2s to 5s
components/ui/spinner.tsx	Changed LoadingOverlay positioning from absolute to fixed
components/elements/image/image.tsx	Added conditional blur placeholder logic
Multiple schema files	Updated image creation to use new async createImagesInDb function
Brand edit components	Improved loading states and image deletion handling

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[Copilot]

The quality option is not valid for PNG format in Sharp. This option is only available for JPEG format. Consider removing this line or switching to JPEG format if quality control is needed.

Suggested change

quality: 60, // Higher quality for better colors