Addresses review comments from PR #7 covering accessibility gaps, animation inconsistencies, misleading UX elements, and branding conflicts.

Accessibility

• Added aria-label to topic chips: aria-label="Search for ${topic.label} videos"
• Added prefers-reduced-motion support: motion-reduce:animate-none motion-reduce:opacity-100

Button Component Consistency

• Fixed gradient animation gap in danger/success variants
• Added missing hover:bg-[position:100%_0] to match primary button behavior

UX Fixes

• Suggested topics: Opens YouTube search in new tab instead of setting invalid search URL as input value
• Video preview card: Added "EXAMPLE OUTPUT PREVIEW" label, removed non-functional play button
• Navigation arrow: Added group class to button for proper group-hover:translate-x-1 behavior

Code Quality

• Consolidated duplicate shimmer animations (skeleton now uses shared keyframe)
• Removed unused CSS classes: .input-glow, .chip, .text-shadow-lg, .text-shadow-glow
• Simplified animation delays (removed unnecessary CSS custom property wrapper)

Branding

• Reverted "Video2Learn" → "UVAI.io" for consistency with layout.tsx metadata, dashboard, and playground

// Before: Sets invalid URL
onSelectTopic={(query) => {
  setVideoUrl(`https://www.youtube.com/results?search_query=${query}`);
}}

// After: Opens search in new tab
onSelectTopic={(query) => {
  const searchUrl = `https://www.youtube.com/results?search_query=${encodeURIComponent(query)}`;
  window.open(searchUrl, '_blank', 'noopener,noreferrer');
}}

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