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/sw.js

@@ -1,6 +0,0 @@
-// Cyrene PWA Service Worker
-const CACHE = 'cyrene-v2'
-const URLS = ['/', '/index.html', '/images/cyrene-avatar.png']
-
-self.addEventListener('install', e => e.waitUntil(caches.open(CACHE).then(c => c.addAll(URLS))))
-self.addEventListener('fetch', e => e.respondWith(caches.match(e.request).then(r => r || fetch(e.request))))