first commit

client/public/manifest.webmanifest

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+{
+  "name": "影视星河设备管理系统",
+  "short_name": "设备管理",
+  "description": "影视星河设备管理系统 - 设备、人员、通知一站式管理",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#1a1a2e",
+  "theme_color": "#7c3aed",
+  "orientation": "portrait",
+  "lang": "zh-CN",
+  "icons": [
+    {
+      "src": "/assets/logo-icon.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/assets/logo-icon.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    }
+  ]
+}

client/public/sw.js

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+/* 简易 Service Worker：缓存静态资源，支持离线访问与 PWA 安装 */
+const CACHE_NAME = 'dms-cache-v1';
+const STATIC_ASSETS = [
+  '/',
+  '/index.html',
+  '/manifest.webmanifest',
+  '/assets/logo-icon.png',
+  '/assets/logo-white.png',
+  '/assets/logo-dark.png'
+];
+
+// 安装阶段：预缓存静态资源
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => cache.addAll(STATIC_ASSETS))
+  );
+  self.skipWaiting();
+});
+
+// 激活阶段：清理旧缓存
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) =>
+      Promise.all(keys.filter((k) => k !== CACHE_NAME).map((k) => caches.delete(k)))
+    )
+  );
+  self.clients.claim();
+});
+
+// 请求阶段：API 走网络，静态资源优先缓存
+self.addEventListener('fetch', (event) => {
+  const url = new URL(event.request.url);
+
+  // API 请求不缓存
+  if (url.pathname.startsWith('/api')) return;
+
+  event.respondWith(
+    caches.match(event.request).then((cached) => {
+      if (cached) return cached;
+      return fetch(event.request).then((response) => {
+        // 只缓存同源 GET 静态资源
+        if (event.request.method === 'GET' && url.origin === self.location.origin) {
+          const clone = response.clone();
+          caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
+        }
+        return response;
+      });
+    }).catch(() => caches.match('/index.html'))
+  );
+});