feat: 同步服务托管网页应用，daywk 单域名部署就绪

intern-log/dist/sw.js

@@ -0,0 +1,46 @@
+const CACHE = 'intern-log-v1'
+const CORE = ['./', './index.html']
+
+self.addEventListener('install', event => {
+  event.waitUntil(caches.open(CACHE).then(c => c.addAll(CORE)).then(() => self.skipWaiting()))
+})
+
+self.addEventListener('activate', event => {
+  event.waitUntil(
+    caches.keys()
+      .then(keys => Promise.all(keys.filter(k => k !== CACHE).map(k => caches.delete(k))))
+      .then(() => self.clients.claim())
+  )
+})
+
+self.addEventListener('fetch', event => {
+  const req = event.request
+  if (req.method !== 'GET') return
+  const url = new URL(req.url)
+  if (url.origin !== location.origin) return
+
+  // 页面导航：网络优先，离线回退缓存的应用壳
+  if (req.mode === 'navigate') {
+    event.respondWith(
+      fetch(req)
+        .then(resp => {
+          const clone = resp.clone()
+          caches.open(CACHE).then(c => c.put('./index.html', clone))
+          return resp
+        })
+        .catch(() => caches.match('./index.html'))
+    )
+    return
+  }
+
+  // 静态资源：缓存优先，未命中时拉取并写入缓存
+  event.respondWith(
+    caches.match(req).then(hit => hit || fetch(req).then(resp => {
+      if (resp.ok) {
+        const clone = resp.clone()
+        caches.open(CACHE).then(c => c.put(req, clone))
+      }
+      return resp
+    }))
+  )
+})