feat: sync animated-background from motion-primitives

[carere]

Summary

• Synced animated-background from motion-primitives into Zaidan registry (primitive: kobalte)
• Components synced: animated-background
• Components failed: none
• Components blocked: none

Components

Component	Transform	Review	Docs	Visual	QA	Notes
animated-background	SUCCESS	WARN	SUCCESS	PASS	PASS	2 review issues auto-fixed (data-slot attrs), dark mode fix applied

Verification Results

Check	Status	Details
Registry validation	PASS	102 items, 2 pre-existing issues (unrelated)
Component files exist	PASS	1/1 files found
MDX docs exist	PASS	1/1 docs found
Example files exist	PASS	1/1 examples found

Changes

New Registry: motion-primitives

• Added motion-primitives to REGISTRIES array in registries.ts
• Added velite collection in velite.config.ts
• Added to sidebar navigation (item-explorer.tsx, item-picker.tsx)

Component: animated-background

• Source: motion-primitives
• Architecture: React motion/react with layoutId + Children.map/cloneElement replaced with CSS transitions + imperative DOM approach
• Dependencies: Zero new deps (uses only SolidJS primitives + cn() utility)
• Examples: 4 variants (Animated Tabs, Animated Tabs Hover, Animated Card Background, Segmented Control)
• Docs: Full MDX with Installation, Examples, and Component API sections

🤖 Generated with Claude Code