Fix: 修复历史图片计数不更新和历史面板显示暂无历史用户的问题

Fix: 修复首张文本场景图重复OCR问题，更新关于页技术栈徽章

Fix: background stays fixed, remove parallax scroll on about page

Fix: clean Qdrant cache when history empty, remove retest button

Fix: add /cover.png endpoint for static file serving

Fix: add /cover.png endpoint for static file serving

Fix: demo skip classify_scene, fix unpack error, fix cover path, update track name

Add cover bg, scene mode selector, single image upload, demo hides upload, about page format

Glassmorphism UI, about page, real demo images, skeleton loading, parallax

Add demo scene button, thread config, user expansion

Fix visualization: build before delete, add text scene vis, click-to-show

Add: DINOv2 threshold 0.5, patch match visualization, history image management

Fix paddlepaddle version to 2.6.2