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feat: add support for super stickers in chat and overlay components, including image display, accessibility labels, and backend parsing enhancements

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Yusuf İpek
2025-10-12 21:37:53 +03:00
parent da1499733f
commit 1678117d16
10 changed files with 138 additions and 15 deletions
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memory-bank/systemPatterns.md
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- **Image Proxy Pattern**: Backend `/proxy/image` endpoint caches YouTube CDN images (avatars, badges, emojis) with MD5-hashed keys, 24hr TTL, and 1000-image LRU eviction. Returns stale cache on 429 errors or network failures. Frontend `proxyImageUrl()` helper transparently rewrites YouTube CDN URLs to use proxy.
- **Smart Message Storage**: Intelligent trimming system preserves all superchats and memberships for entire session while limiting regular messages to 200 most recent. Trimming occurs on every message addition to prevent special message loss. Uses order-preserving algorithm that identifies special messages by index and removes only oldest regular messages.
- **Overlay Animation System**: Two-state approach with `message` (backend data) and `displayMessage` (UI state) enables smooth fade transitions when switching messages. 300ms fade-out followed by content swap and automatic fade-in.
- **Super Sticker Parsing**: Backend `extractSuperChatInfo()` function detects super stickers via `item.sticker` array. Extracts largest image (144x144px) from sticker thumbnails array, handles protocol-relative URLs by converting to HTTPS, and captures accessibility labels for screen readers. Frontend conditionally renders stickers with error handling that hides broken images via `onError` handler.