chore: 清空 v2 实现，重建新架构骨架（人格化通用 Agent 运行时）

frontend/web/public/manifest.json

@@ -1,12 +0,0 @@
-{
-  "name": "Cyrene",
-  "short_name": "Cyrene",
-  "description": "LLM-powered AI companion platform",
-  "start_url": "/",
-  "display": "standalone",
-  "background_color": "#242424",
-  "theme_color": "#3482FF",
-  "icons": [
-    { "src": "/images/cyrene-avatar.png", "sizes": "512x512", "type": "image/png" }
-  ]
-}