Make hero badges more prominent with blue gradient

Redesign landing page with Home Assistant blue theme

v0.5.13: JSON-driven animation system + new landing page style

feat: add scrollable changelog section to landing page

\"fix: revert CSS to working version\"

\"style: adopt HA Material Design\"

\"fix: remove gap between hero and content\"

\"fix: smooth color transitions\"

\"style: adopt Home Assistant color scheme\"

更新内容

"refactor-use-reachy-mini-native-audio"

feat: adapt application for Reachy Mini Application Store

Reorganize file structure for Reachy Mini app

Restructure app for Reachy Mini App Assistant