实物电路上传识别，PWA支持

public/manifest.webmanifest

@@ -0,0 +1,18 @@
+{
+  "name": "AI 电路实验室",
+  "short_name": "AI电路实验室",
+  "start_url": "/",
+  "scope": "/",
+  "display": "standalone",
+  "background_color": "#ffffff",
+  "theme_color": "#ffffff",
+  "description": "一个可安装的 PWA：在浏览器中体验交互式电路虚拟实验室。",
+  "icons": [
+    {
+      "src": "/icon.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    }
+  ]
+}

public/sw.js

@@ -0,0 +1,61 @@
+// Basic service worker for PWA installability and future caching
+// Generated by Copilot — you can extend with runtime caching if needed.
+
+const CACHE_NAME = 'cvl-cache-v1';
+const APP_SHELL = [
+  '/',
+  '/index.html',
+  '/icon.png',
+  // Vite will handle asset hashing; we keep shell minimal to avoid stale caches.
+];
+
+self.addEventListener('install', (event) => {
+  // Skip waiting so updates activate faster.
+  self.skipWaiting();
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => cache.addAll(APP_SHELL)).catch(() => void 0)
+  );
+});
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) =>
+      Promise.all(
+        keys.map((k) => (k === CACHE_NAME ? undefined : caches.delete(k)))
+      )
+    )
+  );
+  // Take control of uncontrolled clients as soon as possible.
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', (event) => {
+  const { request } = event;
+  // Only handle GET requests and same-origin.
+  if (request.method !== 'GET' || new URL(request.url).origin !== self.location.origin) {
+    return;
+  }
+  // Network-first for HTML navigations; cache-first for others.
+  if (request.mode === 'navigate') {
+    event.respondWith(
+      fetch(request)
+        .then((resp) => {
+          const copy = resp.clone();
+          caches.open(CACHE_NAME).then((cache) => cache.put('/', copy)).catch(() => void 0);
+          return resp;
+        })
+        .catch(() => caches.match('/') || caches.match('/index.html'))
+    );
+  } else {
+    event.respondWith(
+      caches.match(request).then((cached) =>
+        cached ||
+        fetch(request).then((resp) => {
+          const copy = resp.clone();
+          caches.open(CACHE_NAME).then((cache) => cache.put(request, copy)).catch(() => void 0);
+          return resp;
+        }).catch(() => cached)
+      )
+    );
+  }
+});

public/vite.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>