Revamp intro loader: logo card with animated particles - #482

Motivation

• Replace the standalone mascot image on the intro screen with a logo-first animated treatment and add particle effects for a more branded, dynamic loading experience.

Description

• Removed the loader motion.img mascot and replaced it with a centered animated logo card that pulses and rotates (eatdoge/src/App.tsx).
• Added a new loaderParticles useMemo array and rendered animated particle spans behind the logo to create motion-rich background effects.
• Kept the existing loader copy and timing logic (preheating the crumbs and the loading timeout) to preserve the previous UX flow.
• All changes are contained to eatdoge/src/App.tsx and use existing Framer Motion patterns already present in the file.

Testing

• Ran npm run build in eatdoge/ which ran tsc and vite build and completed successfully.

Codex Task